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Home Return to list Fire Weather Warning 0027 Issued by the Denver / Boulder Forecast Office
Action: New Issued At: 2026-03-20 13:46:52 948 WWUS85 KBOU 201846 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 1246 PM MDT Fri Mar 20 2026 ...WIDESPREAD CRITICAL FIRE WEATHER CONDITIONS PEAKING SATURDAY... All-time record March heat, exceptionally low humidity, and periods of breezy winds will continue to drive critical fire weather conditions through Saturday. Today, the highest fire danger will be localized to the Cheyenne Ridge and vicinity where winds will be strongest. Breezy winds will become expansive on Saturday coinciding with highly anomalous heat and single-digit humidity, extending into the foothills and high mountain valleys. COZ249-251-202000- /O.CAN.KBOU.FW.A.0021.260321T1700Z-260322T0400Z/ Washington County-Phillips County- 1246 PM MDT Fri Mar 20 2026 ...FIRE WEATHER WATCH IS CANCELLED FOR WIND AND LOW RELATIVE HUMIDITY FOR WASHINGTON COUNTY AND PHILLIPS COUNTY... FIRE ZONES 249 AND 251... The National Weather Service in Denver has cancelled the Fire Weather Watch. Winds are forecast to be light through most of the afternoon hours on Saturday, allowing the watch to be cancelled. Elevated fire weather conditions are still expected due the well above normal temperatures and exceptionally dry humidity. $$ COZ238-242-210300- /O.UPG.KBOU.FW.A.0021.260321T1700Z-260322T0400Z/ /O.NEW.KBOU.FW.W.0027.260321T2000Z-260322T0400Z/ /O.CON.KBOU.FW.W.0026.000000T0000Z-260321T0100Z/ Larimer County Below 6000 Feet/Northwest Weld County- Northeast Weld County- 1246 PM MDT Fri Mar 20 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE CHEYENNE RIDGE AREA AND PAWNEE NATIONAL GRASSLANDS... ...RED FLAG WARNING IN EFFECT FROM 2 PM TO 10 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE NORTHERN I-25 CORRIDOR INCLUDING FORT COLLINS... FIRE WEATHER ZONES 238 AND 242... The National Weather Service in Denver has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 2 PM to 10 PM MDT Saturday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zones 238 and 242. * TIMING...For the first Red Flag Warning, until 7 PM MDT this evening. For the second Red Flag Warning, from 2 PM to 10 PM MDT Saturday. * WINDS...West 10 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 5 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ239>241-243>245-248-250-210300- /O.UPG.KBOU.FW.A.0021.260321T1700Z-260322T0400Z/ /O.NEW.KBOU.FW.W.0027.260321T2000Z-260322T0400Z/ Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County- Elbert/Central and East Douglas Counties Above 6000 Feet- Central and South Weld County-Morgan County- Central and East Adams and Arapahoe Counties-Logan County- Sedgwick County- 1246 PM MDT Fri Mar 20 2026 ...RED FLAG WARNING IN EFFECT FROM 2 PM TO 10 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE I-25 CORRIDOR, PALMER DIVIDE, AND NORTHEAST PLAINS ALONG I-76... The National Weather Service in Denver has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 2 PM to 10 PM MDT Saturday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zones 239, 240, 241, 243, 244, 245, 248 and 250. * TIMING...From 2 PM to 10 PM MDT Saturday. * WINDS...West 10 to 15 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 3 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ214>216-210300- /O.UPG.KBOU.FW.A.0021.260321T1700Z-260322T0400Z/ /O.NEW.KBOU.FW.W.0027.260321T1700Z-260322T0400Z/ Central and Southeast Park County- Larimer and Boulder Counties Between 6000 and 9000 Feet- Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- 1246 PM MDT Fri Mar 20 2026 ...RED FLAG WARNING IN EFFECT FROM 11 AM TO 10 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE FRONT RANGE FOOTHILLS AND SOUTH PARK... FIRE WEATHER ZONES 214 THROUGH 216... The National Weather Service in Denver has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 11 AM to 10 PM MDT Saturday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zones 214, 215 and 216. * TIMING...From 11 AM to 10 PM MDT Saturday. * WINDS...West 10 to 20 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low as 5 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ211-213-210300- /O.UPG.KBOU.FW.A.0021.260321T1700Z-260322T0400Z/ /O.NEW.KBOU.FW.W.0027.260321T1700Z-260322T0400Z/ Jackson County Below 9000 Feet- Grand and Summit Counties Below 9000 Feet- 1246 PM MDT Fri Mar 20 2026 ...RED FLAG WARNING IN EFFECT FROM 11 AM TO 10 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR NORTH PARK AND MIDDLE PARK... FIRE WEATHER ZONES 211 AND 213... The National Weather Service in Denver has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 11 AM to 10 PM MDT Saturday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zones 211 and 213. * TIMING...From 11 AM to 10 PM MDT Saturday. * WINDS...West 10 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 7 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ Action: New Issued At: 2026-03-20 13:46:52 948 WWUS85 KBOU 201846 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 1246 PM MDT Fri Mar 20 2026 ...WIDESPREAD CRITICAL FIRE WEATHER CONDITIONS PEAKING SATURDAY... All-time record March heat, exceptionally low humidity, and periods of breezy winds will continue to drive critical fire weather conditions through Saturday. Today, the highest fire danger will be localized to the Cheyenne Ridge and vicinity where winds will be strongest. Breezy winds will become expansive on Saturday coinciding with highly anomalous heat and single-digit humidity, extending into the foothills and high mountain valleys. COZ249-251-202000- /O.CAN.KBOU.FW.A.0021.260321T1700Z-260322T0400Z/ Washington County-Phillips County- 1246 PM MDT Fri Mar 20 2026 ...FIRE WEATHER WATCH IS CANCELLED FOR WIND AND LOW RELATIVE HUMIDITY FOR WASHINGTON COUNTY AND PHILLIPS COUNTY... FIRE ZONES 249 AND 251... The National Weather Service in Denver has cancelled the Fire Weather Watch. Winds are forecast to be light through most of the afternoon hours on Saturday, allowing the watch to be cancelled. Elevated fire weather conditions are still expected due the well above normal temperatures and exceptionally dry humidity. $$ COZ238-242-210300- /O.UPG.KBOU.FW.A.0021.260321T1700Z-260322T0400Z/ /O.NEW.KBOU.FW.W.0027.260321T2000Z-260322T0400Z/ /O.CON.KBOU.FW.W.0026.000000T0000Z-260321T0100Z/ Larimer County Below 6000 Feet/Northwest Weld County- Northeast Weld County- 1246 PM MDT Fri Mar 20 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE CHEYENNE RIDGE AREA AND PAWNEE NATIONAL GRASSLANDS... ...RED FLAG WARNING IN EFFECT FROM 2 PM TO 10 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE NORTHERN I-25 CORRIDOR INCLUDING FORT COLLINS... FIRE WEATHER ZONES 238 AND 242... The National Weather Service in Denver has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 2 PM to 10 PM MDT Saturday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zones 238 and 242. * TIMING...For the first Red Flag Warning, until 7 PM MDT this evening. For the second Red Flag Warning, from 2 PM to 10 PM MDT Saturday. * WINDS...West 10 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 5 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ239>241-243>245-248-250-210300- /O.UPG.KBOU.FW.A.0021.260321T1700Z-260322T0400Z/ /O.NEW.KBOU.FW.W.0027.260321T2000Z-260322T0400Z/ Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County- Elbert/Central and East Douglas Counties Above 6000 Feet- Central and South Weld County-Morgan County- Central and East Adams and Arapahoe Counties-Logan County- Sedgwick County- 1246 PM MDT Fri Mar 20 2026 ...RED FLAG WARNING IN EFFECT FROM 2 PM TO 10 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE I-25 CORRIDOR, PALMER DIVIDE, AND NORTHEAST PLAINS ALONG I-76... The National Weather Service in Denver has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 2 PM to 10 PM MDT Saturday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zones 239, 240, 241, 243, 244, 245, 248 and 250. * TIMING...From 2 PM to 10 PM MDT Saturday. * WINDS...West 10 to 15 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 3 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ214>216-210300- /O.UPG.KBOU.FW.A.0021.260321T1700Z-260322T0400Z/ /O.NEW.KBOU.FW.W.0027.260321T1700Z-260322T0400Z/ Central and Southeast Park County- Larimer and Boulder Counties Between 6000 and 9000 Feet- Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- 1246 PM MDT Fri Mar 20 2026 ...RED FLAG WARNING IN EFFECT FROM 11 AM TO 10 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE FRONT RANGE FOOTHILLS AND SOUTH PARK... FIRE WEATHER ZONES 214 THROUGH 216... The National Weather Service in Denver has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 11 AM to 10 PM MDT Saturday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zones 214, 215 and 216. * TIMING...From 11 AM to 10 PM MDT Saturday. * WINDS...West 10 to 20 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low as 5 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ211-213-210300- /O.UPG.KBOU.FW.A.0021.260321T1700Z-260322T0400Z/ /O.NEW.KBOU.FW.W.0027.260321T1700Z-260322T0400Z/ Jackson County Below 9000 Feet- Grand and Summit Counties Below 9000 Feet- 1246 PM MDT Fri Mar 20 2026 ...RED FLAG WARNING IN EFFECT FROM 11 AM TO 10 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR NORTH PARK AND MIDDLE PARK... FIRE WEATHER ZONES 211 AND 213... The National Weather Service in Denver has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 11 AM to 10 PM MDT Saturday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zones 211 and 213. * TIMING...From 11 AM to 10 PM MDT Saturday. * WINDS...West 10 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 7 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ Action: New Issued At: 2026-03-20 13:46:52 948 WWUS85 KBOU 201846 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 1246 PM MDT Fri Mar 20 2026 ...WIDESPREAD CRITICAL FIRE WEATHER CONDITIONS PEAKING SATURDAY... All-time record March heat, exceptionally low humidity, and periods of breezy winds will continue to drive critical fire weather conditions through Saturday. Today, the highest fire danger will be localized to the Cheyenne Ridge and vicinity where winds will be strongest. Breezy winds will become expansive on Saturday coinciding with highly anomalous heat and single-digit humidity, extending into the foothills and high mountain valleys. COZ249-251-202000- /O.CAN.KBOU.FW.A.0021.260321T1700Z-260322T0400Z/ Washington County-Phillips County- 1246 PM MDT Fri Mar 20 2026 ...FIRE WEATHER WATCH IS CANCELLED FOR WIND AND LOW RELATIVE HUMIDITY FOR WASHINGTON COUNTY AND PHILLIPS COUNTY... FIRE ZONES 249 AND 251... The National Weather Service in Denver has cancelled the Fire Weather Watch. Winds are forecast to be light through most of the afternoon hours on Saturday, allowing the watch to be cancelled. Elevated fire weather conditions are still expected due the well above normal temperatures and exceptionally dry humidity. $$ COZ238-242-210300- /O.UPG.KBOU.FW.A.0021.260321T1700Z-260322T0400Z/ /O.NEW.KBOU.FW.W.0027.260321T2000Z-260322T0400Z/ /O.CON.KBOU.FW.W.0026.000000T0000Z-260321T0100Z/ Larimer County Below 6000 Feet/Northwest Weld County- Northeast Weld County- 1246 PM MDT Fri Mar 20 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE CHEYENNE RIDGE AREA AND PAWNEE NATIONAL GRASSLANDS... ...RED FLAG WARNING IN EFFECT FROM 2 PM TO 10 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE NORTHERN I-25 CORRIDOR INCLUDING FORT COLLINS... FIRE WEATHER ZONES 238 AND 242... The National Weather Service in Denver has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 2 PM to 10 PM MDT Saturday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zones 238 and 242. * TIMING...For the first Red Flag Warning, until 7 PM MDT this evening. For the second Red Flag Warning, from 2 PM to 10 PM MDT Saturday. * WINDS...West 10 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 5 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ239>241-243>245-248-250-210300- /O.UPG.KBOU.FW.A.0021.260321T1700Z-260322T0400Z/ /O.NEW.KBOU.FW.W.0027.260321T2000Z-260322T0400Z/ Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County- Elbert/Central and East Douglas Counties Above 6000 Feet- Central and South Weld County-Morgan County- Central and East Adams and Arapahoe Counties-Logan County- Sedgwick County- 1246 PM MDT Fri Mar 20 2026 ...RED FLAG WARNING IN EFFECT FROM 2 PM TO 10 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE I-25 CORRIDOR, PALMER DIVIDE, AND NORTHEAST PLAINS ALONG I-76... The National Weather Service in Denver has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 2 PM to 10 PM MDT Saturday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zones 239, 240, 241, 243, 244, 245, 248 and 250. * TIMING...From 2 PM to 10 PM MDT Saturday. * WINDS...West 10 to 15 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 3 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ214>216-210300- /O.UPG.KBOU.FW.A.0021.260321T1700Z-260322T0400Z/ /O.NEW.KBOU.FW.W.0027.260321T1700Z-260322T0400Z/ Central and Southeast Park County- Larimer and Boulder Counties Between 6000 and 9000 Feet- Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- 1246 PM MDT Fri Mar 20 2026 ...RED FLAG WARNING IN EFFECT FROM 11 AM TO 10 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE FRONT RANGE FOOTHILLS AND SOUTH PARK... FIRE WEATHER ZONES 214 THROUGH 216... The National Weather Service in Denver has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 11 AM to 10 PM MDT Saturday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zones 214, 215 and 216. * TIMING...From 11 AM to 10 PM MDT Saturday. * WINDS...West 10 to 20 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low as 5 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ211-213-210300- /O.UPG.KBOU.FW.A.0021.260321T1700Z-260322T0400Z/ /O.NEW.KBOU.FW.W.0027.260321T1700Z-260322T0400Z/ Jackson County Below 9000 Feet- Grand and Summit Counties Below 9000 Feet- 1246 PM MDT Fri Mar 20 2026 ...RED FLAG WARNING IN EFFECT FROM 11 AM TO 10 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR NORTH PARK AND MIDDLE PARK... FIRE WEATHER ZONES 211 AND 213... The National Weather Service in Denver has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 11 AM to 10 PM MDT Saturday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zones 211 and 213. * TIMING...From 11 AM to 10 PM MDT Saturday. * WINDS...West 10 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 7 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ Action: New Issued At: 2026-03-20 13:46:52 948 WWUS85 KBOU 201846 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 1246 PM MDT Fri Mar 20 2026 ...WIDESPREAD CRITICAL FIRE WEATHER CONDITIONS PEAKING SATURDAY... All-time record March heat, exceptionally low humidity, and periods of breezy winds will continue to drive critical fire weather conditions through Saturday. Today, the highest fire danger will be localized to the Cheyenne Ridge and vicinity where winds will be strongest. Breezy winds will become expansive on Saturday coinciding with highly anomalous heat and single-digit humidity, extending into the foothills and high mountain valleys. COZ249-251-202000- /O.CAN.KBOU.FW.A.0021.260321T1700Z-260322T0400Z/ Washington County-Phillips County- 1246 PM MDT Fri Mar 20 2026 ...FIRE WEATHER WATCH IS CANCELLED FOR WIND AND LOW RELATIVE HUMIDITY FOR WASHINGTON COUNTY AND PHILLIPS COUNTY... FIRE ZONES 249 AND 251... The National Weather Service in Denver has cancelled the Fire Weather Watch. Winds are forecast to be light through most of the afternoon hours on Saturday, allowing the watch to be cancelled. Elevated fire weather conditions are still expected due the well above normal temperatures and exceptionally dry humidity. $$ COZ238-242-210300- /O.UPG.KBOU.FW.A.0021.260321T1700Z-260322T0400Z/ /O.NEW.KBOU.FW.W.0027.260321T2000Z-260322T0400Z/ /O.CON.KBOU.FW.W.0026.000000T0000Z-260321T0100Z/ Larimer County Below 6000 Feet/Northwest Weld County- Northeast Weld County- 1246 PM MDT Fri Mar 20 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE CHEYENNE RIDGE AREA AND PAWNEE NATIONAL GRASSLANDS... ...RED FLAG WARNING IN EFFECT FROM 2 PM TO 10 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE NORTHERN I-25 CORRIDOR INCLUDING FORT COLLINS... FIRE WEATHER ZONES 238 AND 242... The National Weather Service in Denver has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 2 PM to 10 PM MDT Saturday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zones 238 and 242. * TIMING...For the first Red Flag Warning, until 7 PM MDT this evening. For the second Red Flag Warning, from 2 PM to 10 PM MDT Saturday. * WINDS...West 10 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 5 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ239>241-243>245-248-250-210300- /O.UPG.KBOU.FW.A.0021.260321T1700Z-260322T0400Z/ /O.NEW.KBOU.FW.W.0027.260321T2000Z-260322T0400Z/ Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County- Elbert/Central and East Douglas Counties Above 6000 Feet- Central and South Weld County-Morgan County- Central and East Adams and Arapahoe Counties-Logan County- Sedgwick County- 1246 PM MDT Fri Mar 20 2026 ...RED FLAG WARNING IN EFFECT FROM 2 PM TO 10 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE I-25 CORRIDOR, PALMER DIVIDE, AND NORTHEAST PLAINS ALONG I-76... The National Weather Service in Denver has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 2 PM to 10 PM MDT Saturday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zones 239, 240, 241, 243, 244, 245, 248 and 250. * TIMING...From 2 PM to 10 PM MDT Saturday. * WINDS...West 10 to 15 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 3 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ214>216-210300- /O.UPG.KBOU.FW.A.0021.260321T1700Z-260322T0400Z/ /O.NEW.KBOU.FW.W.0027.260321T1700Z-260322T0400Z/ Central and Southeast Park County- Larimer and Boulder Counties Between 6000 and 9000 Feet- Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- 1246 PM MDT Fri Mar 20 2026 ...RED FLAG WARNING IN EFFECT FROM 11 AM TO 10 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE FRONT RANGE FOOTHILLS AND SOUTH PARK... FIRE WEATHER ZONES 214 THROUGH 216... The National Weather Service in Denver has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 11 AM to 10 PM MDT Saturday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zones 214, 215 and 216. * TIMING...From 11 AM to 10 PM MDT Saturday. * WINDS...West 10 to 20 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low as 5 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ211-213-210300- /O.UPG.KBOU.FW.A.0021.260321T1700Z-260322T0400Z/ /O.NEW.KBOU.FW.W.0027.260321T1700Z-260322T0400Z/ Jackson County Below 9000 Feet- Grand and Summit Counties Below 9000 Feet- 1246 PM MDT Fri Mar 20 2026 ...RED FLAG WARNING IN EFFECT FROM 11 AM TO 10 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR NORTH PARK AND MIDDLE PARK... FIRE WEATHER ZONES 211 AND 213... The National Weather Service in Denver has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 11 AM to 10 PM MDT Saturday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zones 211 and 213. * TIMING...From 11 AM to 10 PM MDT Saturday. * WINDS...West 10 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 7 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ Action: Continued Issued At: 2026-03-20 19:56:04 378 WWUS85 KBOU 210055 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 655 PM MDT Fri Mar 20 2026 ...WIDESPREAD CRITICAL FIRE WEATHER CONDITIONS PEAKING SATURDAY... All-time record March heat, exceptionally low humidity, and periods of breezy winds will continue to drive critical fire weather conditions through Saturday. COZ238-242-211300- /O.EXP.KBOU.FW.W.0026.000000T0000Z-260321T0100Z/ /O.CON.KBOU.FW.W.0027.260321T2000Z-260322T0400Z/ Larimer County Below 6000 Feet/Northwest Weld County- Northeast Weld County- 655 PM MDT Fri Mar 20 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM 2 PM TO 10 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE CHEYENNE RIDGE AREA AND PAWNEE NATIONAL GRASSLANDS... ...RED FLAG WARNING WILL EXPIRE AT 7 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE CHEYENNE RIDGE AREA AND PAWNEE NATIONAL GRASSLANDS... * AFFECTED AREA...Fire Weather Zones 238 and 242. * TIMING...From 2 PM to 10 PM MDT Saturday. * WINDS...West 10 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 5 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ239>241-243>245-248-250-211300- /O.CON.KBOU.FW.W.0027.260321T2000Z-260322T0400Z/ Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County- Elbert/Central and East Douglas Counties Above 6000 Feet- Central and South Weld County-Morgan County- Central and East Adams and Arapahoe Counties-Logan County- Sedgwick County- 655 PM MDT Fri Mar 20 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM 2 PM TO 10 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE I-25 CORRIDOR, PALMER DIVIDE, AND NORTHEAST PLAINS ALONG I-76... * AFFECTED AREA...Fire Weather Zones 239, 240, 241, 243, 244, 245, 248 and 250. * TIMING...From 2 PM to 10 PM MDT Saturday. * WINDS...West 10 to 15 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 4 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ214>216-211300- /O.CON.KBOU.FW.W.0027.260321T1700Z-260322T0400Z/ Central and Southeast Park County- Larimer and Boulder Counties Between 6000 and 9000 Feet- Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- 655 PM MDT Fri Mar 20 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM TO 10 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE FRONT RANGE FOOTHILLS AND SOUTH PARK...FIRE WEATHER ZONES 214 THROUGH 216... * AFFECTED AREA...Fire Weather Zones 214, 215 and 216. * TIMING...From 11 AM to 10 PM MDT Saturday. * WINDS...West 10 to 20 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low as 5 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ211-213-211300- /O.CON.KBOU.FW.W.0027.260321T1700Z-260322T0400Z/ Jackson County Below 9000 Feet- Grand and Summit Counties Below 9000 Feet- 655 PM MDT Fri Mar 20 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM TO 10 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR NORTH PARK AND MIDDLE PARK...FIRE WEATHER ZONES 211 AND 213... * AFFECTED AREA...Fire Weather Zones 211 and 213. * TIMING...From 11 AM to 10 PM MDT Saturday. * WINDS...West 10 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 7 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ Action: Continued Issued At: 2026-03-20 19:56:04 378 WWUS85 KBOU 210055 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 655 PM MDT Fri Mar 20 2026 ...WIDESPREAD CRITICAL FIRE WEATHER CONDITIONS PEAKING SATURDAY... All-time record March heat, exceptionally low humidity, and periods of breezy winds will continue to drive critical fire weather conditions through Saturday. COZ238-242-211300- /O.EXP.KBOU.FW.W.0026.000000T0000Z-260321T0100Z/ /O.CON.KBOU.FW.W.0027.260321T2000Z-260322T0400Z/ Larimer County Below 6000 Feet/Northwest Weld County- Northeast Weld County- 655 PM MDT Fri Mar 20 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM 2 PM TO 10 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE CHEYENNE RIDGE AREA AND PAWNEE NATIONAL GRASSLANDS... ...RED FLAG WARNING WILL EXPIRE AT 7 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE CHEYENNE RIDGE AREA AND PAWNEE NATIONAL GRASSLANDS... * AFFECTED AREA...Fire Weather Zones 238 and 242. * TIMING...From 2 PM to 10 PM MDT Saturday. * WINDS...West 10 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 5 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ239>241-243>245-248-250-211300- /O.CON.KBOU.FW.W.0027.260321T2000Z-260322T0400Z/ Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County- Elbert/Central and East Douglas Counties Above 6000 Feet- Central and South Weld County-Morgan County- Central and East Adams and Arapahoe Counties-Logan County- Sedgwick County- 655 PM MDT Fri Mar 20 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM 2 PM TO 10 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE I-25 CORRIDOR, PALMER DIVIDE, AND NORTHEAST PLAINS ALONG I-76... * AFFECTED AREA...Fire Weather Zones 239, 240, 241, 243, 244, 245, 248 and 250. * TIMING...From 2 PM to 10 PM MDT Saturday. * WINDS...West 10 to 15 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 4 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ214>216-211300- /O.CON.KBOU.FW.W.0027.260321T1700Z-260322T0400Z/ Central and Southeast Park County- Larimer and Boulder Counties Between 6000 and 9000 Feet- Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- 655 PM MDT Fri Mar 20 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM TO 10 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE FRONT RANGE FOOTHILLS AND SOUTH PARK...FIRE WEATHER ZONES 214 THROUGH 216... * AFFECTED AREA...Fire Weather Zones 214, 215 and 216. * TIMING...From 11 AM to 10 PM MDT Saturday. * WINDS...West 10 to 20 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low as 5 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ211-213-211300- /O.CON.KBOU.FW.W.0027.260321T1700Z-260322T0400Z/ Jackson County Below 9000 Feet- Grand and Summit Counties Below 9000 Feet- 655 PM MDT Fri Mar 20 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM TO 10 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR NORTH PARK AND MIDDLE PARK...FIRE WEATHER ZONES 211 AND 213... * AFFECTED AREA...Fire Weather Zones 211 and 213. * TIMING...From 11 AM to 10 PM MDT Saturday. * WINDS...West 10 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 7 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ Action: Continued Issued At: 2026-03-20 19:56:04 378 WWUS85 KBOU 210055 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 655 PM MDT Fri Mar 20 2026 ...WIDESPREAD CRITICAL FIRE WEATHER CONDITIONS PEAKING SATURDAY... All-time record March heat, exceptionally low humidity, and periods of breezy winds will continue to drive critical fire weather conditions through Saturday. COZ238-242-211300- /O.EXP.KBOU.FW.W.0026.000000T0000Z-260321T0100Z/ /O.CON.KBOU.FW.W.0027.260321T2000Z-260322T0400Z/ Larimer County Below 6000 Feet/Northwest Weld County- Northeast Weld County- 655 PM MDT Fri Mar 20 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM 2 PM TO 10 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE CHEYENNE RIDGE AREA AND PAWNEE NATIONAL GRASSLANDS... ...RED FLAG WARNING WILL EXPIRE AT 7 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE CHEYENNE RIDGE AREA AND PAWNEE NATIONAL GRASSLANDS... * AFFECTED AREA...Fire Weather Zones 238 and 242. * TIMING...From 2 PM to 10 PM MDT Saturday. * WINDS...West 10 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 5 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ239>241-243>245-248-250-211300- /O.CON.KBOU.FW.W.0027.260321T2000Z-260322T0400Z/ Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County- Elbert/Central and East Douglas Counties Above 6000 Feet- Central and South Weld County-Morgan County- Central and East Adams and Arapahoe Counties-Logan County- Sedgwick County- 655 PM MDT Fri Mar 20 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM 2 PM TO 10 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE I-25 CORRIDOR, PALMER DIVIDE, AND NORTHEAST PLAINS ALONG I-76... * AFFECTED AREA...Fire Weather Zones 239, 240, 241, 243, 244, 245, 248 and 250. * TIMING...From 2 PM to 10 PM MDT Saturday. * WINDS...West 10 to 15 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 4 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ214>216-211300- /O.CON.KBOU.FW.W.0027.260321T1700Z-260322T0400Z/ Central and Southeast Park County- Larimer and Boulder Counties Between 6000 and 9000 Feet- Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- 655 PM MDT Fri Mar 20 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM TO 10 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE FRONT RANGE FOOTHILLS AND SOUTH PARK...FIRE WEATHER ZONES 214 THROUGH 216... * AFFECTED AREA...Fire Weather Zones 214, 215 and 216. * TIMING...From 11 AM to 10 PM MDT Saturday. * WINDS...West 10 to 20 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low as 5 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ211-213-211300- /O.CON.KBOU.FW.W.0027.260321T1700Z-260322T0400Z/ Jackson County Below 9000 Feet- Grand and Summit Counties Below 9000 Feet- 655 PM MDT Fri Mar 20 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM TO 10 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR NORTH PARK AND MIDDLE PARK...FIRE WEATHER ZONES 211 AND 213... * AFFECTED AREA...Fire Weather Zones 211 and 213. * TIMING...From 11 AM to 10 PM MDT Saturday. * WINDS...West 10 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 7 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ Action: Continued Issued At: 2026-03-20 19:56:04 378 WWUS85 KBOU 210055 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 655 PM MDT Fri Mar 20 2026 ...WIDESPREAD CRITICAL FIRE WEATHER CONDITIONS PEAKING SATURDAY... All-time record March heat, exceptionally low humidity, and periods of breezy winds will continue to drive critical fire weather conditions through Saturday. COZ238-242-211300- /O.EXP.KBOU.FW.W.0026.000000T0000Z-260321T0100Z/ /O.CON.KBOU.FW.W.0027.260321T2000Z-260322T0400Z/ Larimer County Below 6000 Feet/Northwest Weld County- Northeast Weld County- 655 PM MDT Fri Mar 20 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM 2 PM TO 10 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE CHEYENNE RIDGE AREA AND PAWNEE NATIONAL GRASSLANDS... ...RED FLAG WARNING WILL EXPIRE AT 7 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE CHEYENNE RIDGE AREA AND PAWNEE NATIONAL GRASSLANDS... * AFFECTED AREA...Fire Weather Zones 238 and 242. * TIMING...From 2 PM to 10 PM MDT Saturday. * WINDS...West 10 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 5 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ239>241-243>245-248-250-211300- /O.CON.KBOU.FW.W.0027.260321T2000Z-260322T0400Z/ Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County- Elbert/Central and East Douglas Counties Above 6000 Feet- Central and South Weld County-Morgan County- Central and East Adams and Arapahoe Counties-Logan County- Sedgwick County- 655 PM MDT Fri Mar 20 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM 2 PM TO 10 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE I-25 CORRIDOR, PALMER DIVIDE, AND NORTHEAST PLAINS ALONG I-76... * AFFECTED AREA...Fire Weather Zones 239, 240, 241, 243, 244, 245, 248 and 250. * TIMING...From 2 PM to 10 PM MDT Saturday. * WINDS...West 10 to 15 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 4 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ214>216-211300- /O.CON.KBOU.FW.W.0027.260321T1700Z-260322T0400Z/ Central and Southeast Park County- Larimer and Boulder Counties Between 6000 and 9000 Feet- Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- 655 PM MDT Fri Mar 20 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM TO 10 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE FRONT RANGE FOOTHILLS AND SOUTH PARK...FIRE WEATHER ZONES 214 THROUGH 216... * AFFECTED AREA...Fire Weather Zones 214, 215 and 216. * TIMING...From 11 AM to 10 PM MDT Saturday. * WINDS...West 10 to 20 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low as 5 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ211-213-211300- /O.CON.KBOU.FW.W.0027.260321T1700Z-260322T0400Z/ Jackson County Below 9000 Feet- Grand and Summit Counties Below 9000 Feet- 655 PM MDT Fri Mar 20 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM TO 10 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR NORTH PARK AND MIDDLE PARK...FIRE WEATHER ZONES 211 AND 213... * AFFECTED AREA...Fire Weather Zones 211 and 213. * TIMING...From 11 AM to 10 PM MDT Saturday. * WINDS...West 10 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 7 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ Action: Continued Issued At: 2026-03-21 06:43:09 174 WWUS85 KBOU 211142 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 542 AM MDT Sat Mar 21 2026 ...WIDESPREAD CRITICAL FIRE WEATHER CONDITIONS TODAY... All-time record March heat, exceptionally low humidity, and periods of breezy winds will drive critical fire weather conditions this afternoon, most pronounced above 6,000 ft and west of I-25 where winds will be strongest. COZ238>245-248-250-220400- /O.CON.KBOU.FW.W.0027.260321T2000Z-260322T0400Z/ Larimer County Below 6000 Feet/Northwest Weld County- Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County- Elbert/Central and East Douglas Counties Above 6000 Feet- Northeast Weld County-Central and South Weld County-Morgan County- Central and East Adams and Arapahoe Counties-Logan County- Sedgwick County- 542 AM MDT Sat Mar 21 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM 2 PM THIS AFTERNOON TO 10 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE CHEYENNE RIDGE AREA AND PAWNEE NATIONAL GRASSLANDS... * AFFECTED AREA...Fire Weather Zones 238, 239, 240, 241, 242, 243, 244, 245, 248 and 250. * TIMING...From 2 PM this afternoon to 10 PM MDT this evening. * WINDS...West 10 to 20 mph with gusts 25 to 35 mph. * RELATIVE HUMIDITY...As low as 3 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ214>216-220400- /O.CON.KBOU.FW.W.0027.260321T1700Z-260322T0400Z/ Central and Southeast Park County- Larimer and Boulder Counties Between 6000 and 9000 Feet- Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- 542 AM MDT Sat Mar 21 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 10 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE FRONT RANGE FOOTHILLS AND SOUTH PARK...FIRE WEATHER ZONES 214 THROUGH 216... * AFFECTED AREA...Fire Weather Zones 214, 215 and 216. * TIMING...From 11 AM this morning to 10 PM MDT this evening. * WINDS...West 15 to 20 mph with gusts 35 to 40 mph. * RELATIVE HUMIDITY...4 to 9 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ211-213-220400- /O.CON.KBOU.FW.W.0027.260321T1700Z-260322T0400Z/ Jackson County Below 9000 Feet- Grand and Summit Counties Below 9000 Feet- 542 AM MDT Sat Mar 21 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 10 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR NORTH PARK AND MIDDLE PARK...FIRE WEATHER ZONES 211 AND 213... * AFFECTED AREA...Fire Weather Zones 211 and 213. * TIMING...From 11 AM this morning to 10 PM MDT this evening. * WINDS...West 15 to 20 mph with gusts 35 to 40 mph. * RELATIVE HUMIDITY...5 to 10 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ Rodriguez Action: Continued Issued At: 2026-03-21 06:43:09 174 WWUS85 KBOU 211142 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 542 AM MDT Sat Mar 21 2026 ...WIDESPREAD CRITICAL FIRE WEATHER CONDITIONS TODAY... All-time record March heat, exceptionally low humidity, and periods of breezy winds will drive critical fire weather conditions this afternoon, most pronounced above 6,000 ft and west of I-25 where winds will be strongest. COZ238>245-248-250-220400- /O.CON.KBOU.FW.W.0027.260321T2000Z-260322T0400Z/ Larimer County Below 6000 Feet/Northwest Weld County- Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County- Elbert/Central and East Douglas Counties Above 6000 Feet- Northeast Weld County-Central and South Weld County-Morgan County- Central and East Adams and Arapahoe Counties-Logan County- Sedgwick County- 542 AM MDT Sat Mar 21 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM 2 PM THIS AFTERNOON TO 10 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE CHEYENNE RIDGE AREA AND PAWNEE NATIONAL GRASSLANDS... * AFFECTED AREA...Fire Weather Zones 238, 239, 240, 241, 242, 243, 244, 245, 248 and 250. * TIMING...From 2 PM this afternoon to 10 PM MDT this evening. * WINDS...West 10 to 20 mph with gusts 25 to 35 mph. * RELATIVE HUMIDITY...As low as 3 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ214>216-220400- /O.CON.KBOU.FW.W.0027.260321T1700Z-260322T0400Z/ Central and Southeast Park County- Larimer and Boulder Counties Between 6000 and 9000 Feet- Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- 542 AM MDT Sat Mar 21 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 10 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE FRONT RANGE FOOTHILLS AND SOUTH PARK...FIRE WEATHER ZONES 214 THROUGH 216... * AFFECTED AREA...Fire Weather Zones 214, 215 and 216. * TIMING...From 11 AM this morning to 10 PM MDT this evening. * WINDS...West 15 to 20 mph with gusts 35 to 40 mph. * RELATIVE HUMIDITY...4 to 9 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ211-213-220400- /O.CON.KBOU.FW.W.0027.260321T1700Z-260322T0400Z/ Jackson County Below 9000 Feet- Grand and Summit Counties Below 9000 Feet- 542 AM MDT Sat Mar 21 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 10 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR NORTH PARK AND MIDDLE PARK...FIRE WEATHER ZONES 211 AND 213... * AFFECTED AREA...Fire Weather Zones 211 and 213. * TIMING...From 11 AM this morning to 10 PM MDT this evening. * WINDS...West 15 to 20 mph with gusts 35 to 40 mph. * RELATIVE HUMIDITY...5 to 10 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ Rodriguez Action: Continued Issued At: 2026-03-21 06:43:09 174 WWUS85 KBOU 211142 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 542 AM MDT Sat Mar 21 2026 ...WIDESPREAD CRITICAL FIRE WEATHER CONDITIONS TODAY... All-time record March heat, exceptionally low humidity, and periods of breezy winds will drive critical fire weather conditions this afternoon, most pronounced above 6,000 ft and west of I-25 where winds will be strongest. COZ238>245-248-250-220400- /O.CON.KBOU.FW.W.0027.260321T2000Z-260322T0400Z/ Larimer County Below 6000 Feet/Northwest Weld County- Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County- Elbert/Central and East Douglas Counties Above 6000 Feet- Northeast Weld County-Central and South Weld County-Morgan County- Central and East Adams and Arapahoe Counties-Logan County- Sedgwick County- 542 AM MDT Sat Mar 21 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM 2 PM THIS AFTERNOON TO 10 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE CHEYENNE RIDGE AREA AND PAWNEE NATIONAL GRASSLANDS... * AFFECTED AREA...Fire Weather Zones 238, 239, 240, 241, 242, 243, 244, 245, 248 and 250. * TIMING...From 2 PM this afternoon to 10 PM MDT this evening. * WINDS...West 10 to 20 mph with gusts 25 to 35 mph. * RELATIVE HUMIDITY...As low as 3 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ214>216-220400- /O.CON.KBOU.FW.W.0027.260321T1700Z-260322T0400Z/ Central and Southeast Park County- Larimer and Boulder Counties Between 6000 and 9000 Feet- Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- 542 AM MDT Sat Mar 21 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 10 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE FRONT RANGE FOOTHILLS AND SOUTH PARK...FIRE WEATHER ZONES 214 THROUGH 216... * AFFECTED AREA...Fire Weather Zones 214, 215 and 216. * TIMING...From 11 AM this morning to 10 PM MDT this evening. * WINDS...West 15 to 20 mph with gusts 35 to 40 mph. * RELATIVE HUMIDITY...4 to 9 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ211-213-220400- /O.CON.KBOU.FW.W.0027.260321T1700Z-260322T0400Z/ Jackson County Below 9000 Feet- Grand and Summit Counties Below 9000 Feet- 542 AM MDT Sat Mar 21 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 10 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR NORTH PARK AND MIDDLE PARK...FIRE WEATHER ZONES 211 AND 213... * AFFECTED AREA...Fire Weather Zones 211 and 213. * TIMING...From 11 AM this morning to 10 PM MDT this evening. * WINDS...West 15 to 20 mph with gusts 35 to 40 mph. * RELATIVE HUMIDITY...5 to 10 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ Rodriguez Action: Continued Issued At: 2026-03-21 12:54:22 174 WWUS85 KBOU 211754 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 1154 AM MDT Sat Mar 21 2026 ...WIDESPREAD CRITICAL FIRE WEATHER CONDITIONS TODAY... All-time record March heat, exceptionally low humidity, and periods of breezy winds will drive critical fire weather conditions this afternoon, most pronounced above 6,000 ft and west of I-25 where winds will be strongest. COZ238>245-248-250-220400- /O.CON.KBOU.FW.W.0027.260321T2000Z-260322T0400Z/ Larimer County Below 6000 Feet/Northwest Weld County- Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County- Elbert/Central and East Douglas Counties Above 6000 Feet- Northeast Weld County-Central and South Weld County-Morgan County- Central and East Adams and Arapahoe Counties-Logan County- Sedgwick County- 1154 AM MDT Sat Mar 21 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE I-25 CORRIDOR, PALMER DIVIDE, AND NORTHEAST PLAINS ALONG I-76... * AFFECTED AREA...Fire Weather Zones 238, 239, 240, 241, 242, 243, 244, 245, 248 and 250. * TIMING...From 2 PM this afternoon to 10 PM MDT this evening. * WINDS...West 10 to 15 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 4 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ214>216-220400- /O.CON.KBOU.FW.W.0027.000000T0000Z-260322T0400Z/ Central and Southeast Park County- Larimer and Boulder Counties Between 6000 and 9000 Feet- Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- 1154 AM MDT Sat Mar 21 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE FRONT RANGE FOOTHILLS AND SOUTH PARK...FIRE WEATHER ZONES 214 THROUGH 216... * AFFECTED AREA...Fire Weather Zones 214, 215 and 216. * TIMING...Until 10 PM MDT this evening. * WINDS...West 15 to 25 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...4 to 9 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ211-213-220400- /O.CON.KBOU.FW.W.0027.000000T0000Z-260322T0400Z/ Jackson County Below 9000 Feet- Grand and Summit Counties Below 9000 Feet- 1154 AM MDT Sat Mar 21 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR NORTH PARK AND MIDDLE PARK...FIRE WEATHER ZONES 211 AND 213... * AFFECTED AREA...Fire Weather Zones 211 and 213. * TIMING...Until 10 PM MDT this evening. * WINDS...West 15 to 25 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...6 to 10 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ Action: Continued Issued At: 2026-03-21 12:54:22 174 WWUS85 KBOU 211754 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 1154 AM MDT Sat Mar 21 2026 ...WIDESPREAD CRITICAL FIRE WEATHER CONDITIONS TODAY... All-time record March heat, exceptionally low humidity, and periods of breezy winds will drive critical fire weather conditions this afternoon, most pronounced above 6,000 ft and west of I-25 where winds will be strongest. COZ238>245-248-250-220400- /O.CON.KBOU.FW.W.0027.260321T2000Z-260322T0400Z/ Larimer County Below 6000 Feet/Northwest Weld County- Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County- Elbert/Central and East Douglas Counties Above 6000 Feet- Northeast Weld County-Central and South Weld County-Morgan County- Central and East Adams and Arapahoe Counties-Logan County- Sedgwick County- 1154 AM MDT Sat Mar 21 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE I-25 CORRIDOR, PALMER DIVIDE, AND NORTHEAST PLAINS ALONG I-76... * AFFECTED AREA...Fire Weather Zones 238, 239, 240, 241, 242, 243, 244, 245, 248 and 250. * TIMING...From 2 PM this afternoon to 10 PM MDT this evening. * WINDS...West 10 to 15 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 4 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ214>216-220400- /O.CON.KBOU.FW.W.0027.000000T0000Z-260322T0400Z/ Central and Southeast Park County- Larimer and Boulder Counties Between 6000 and 9000 Feet- Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- 1154 AM MDT Sat Mar 21 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE FRONT RANGE FOOTHILLS AND SOUTH PARK...FIRE WEATHER ZONES 214 THROUGH 216... * AFFECTED AREA...Fire Weather Zones 214, 215 and 216. * TIMING...Until 10 PM MDT this evening. * WINDS...West 15 to 25 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...4 to 9 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ211-213-220400- /O.CON.KBOU.FW.W.0027.000000T0000Z-260322T0400Z/ Jackson County Below 9000 Feet- Grand and Summit Counties Below 9000 Feet- 1154 AM MDT Sat Mar 21 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR NORTH PARK AND MIDDLE PARK...FIRE WEATHER ZONES 211 AND 213... * AFFECTED AREA...Fire Weather Zones 211 and 213. * TIMING...Until 10 PM MDT this evening. * WINDS...West 15 to 25 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...6 to 10 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ Action: Continued Issued At: 2026-03-21 12:54:22 174 WWUS85 KBOU 211754 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 1154 AM MDT Sat Mar 21 2026 ...WIDESPREAD CRITICAL FIRE WEATHER CONDITIONS TODAY... All-time record March heat, exceptionally low humidity, and periods of breezy winds will drive critical fire weather conditions this afternoon, most pronounced above 6,000 ft and west of I-25 where winds will be strongest. COZ238>245-248-250-220400- /O.CON.KBOU.FW.W.0027.260321T2000Z-260322T0400Z/ Larimer County Below 6000 Feet/Northwest Weld County- Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County- Elbert/Central and East Douglas Counties Above 6000 Feet- Northeast Weld County-Central and South Weld County-Morgan County- Central and East Adams and Arapahoe Counties-Logan County- Sedgwick County- 1154 AM MDT Sat Mar 21 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE I-25 CORRIDOR, PALMER DIVIDE, AND NORTHEAST PLAINS ALONG I-76... * AFFECTED AREA...Fire Weather Zones 238, 239, 240, 241, 242, 243, 244, 245, 248 and 250. * TIMING...From 2 PM this afternoon to 10 PM MDT this evening. * WINDS...West 10 to 15 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 4 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ214>216-220400- /O.CON.KBOU.FW.W.0027.000000T0000Z-260322T0400Z/ Central and Southeast Park County- Larimer and Boulder Counties Between 6000 and 9000 Feet- Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- 1154 AM MDT Sat Mar 21 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE FRONT RANGE FOOTHILLS AND SOUTH PARK...FIRE WEATHER ZONES 214 THROUGH 216... * AFFECTED AREA...Fire Weather Zones 214, 215 and 216. * TIMING...Until 10 PM MDT this evening. * WINDS...West 15 to 25 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...4 to 9 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ211-213-220400- /O.CON.KBOU.FW.W.0027.000000T0000Z-260322T0400Z/ Jackson County Below 9000 Feet- Grand and Summit Counties Below 9000 Feet- 1154 AM MDT Sat Mar 21 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR NORTH PARK AND MIDDLE PARK...FIRE WEATHER ZONES 211 AND 213... * AFFECTED AREA...Fire Weather Zones 211 and 213. * TIMING...Until 10 PM MDT this evening. * WINDS...West 15 to 25 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...6 to 10 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ Action: Expired Issued At: 2026-03-21 23:03:22 500 WWUS85 KBOU 220402 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 1002 PM MDT Sat Mar 21 2026 COZ211-213>216-238>245-248-250-220515- /O.EXP.KBOU.FW.W.0027.000000T0000Z-260322T0400Z/ Jackson County Below 9000 Feet- Grand and Summit Counties Below 9000 Feet- Central and Southeast Park County- Larimer and Boulder Counties Between 6000 and 9000 Feet- Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- Larimer County Below 6000 Feet/Northwest Weld County- Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County- Elbert/Central and East Douglas Counties Above 6000 Feet- Northeast Weld County-Central and South Weld County-Morgan County- Central and East Adams and Arapahoe Counties-Logan County- Sedgwick County- 1002 PM MDT Sat Mar 21 2026 ...RED FLAG WARNING HAS EXPIRED FOR WIND AND LOW RELATIVE HUMIDITY FOR THE I-25 CORRIDOR, PALMER DIVIDE, AND NORTHEAST PLAINS ALONG I-76... Winds have generally weakened across the forecast area, with relative humidities slowly rising. For this reason, will let the Red Flag Warning expire. However, elevated fire weather conditions are still possible for the next hour. $$ | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||