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Home Return to list Fire Weather Watch 0018 Issued by the Denver / Boulder Forecast Office
Action: New Issued At: 2025-12-21 15:31:42 846 WWUS85 KBOU 212131 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 231 PM MST Sun Dec 21 2025 ...CRITICAL FIRE WEATHER CONDITIONS POSSIBLE AGAIN MONDAY... .Near record temperatures on Monday, combined with another period of gusty westerly winds across the Front Range foothills will lead to elevated to critical fire weather conditions, especially from the Boulder county foothills south into South Park. COZ214>216-220545- /O.NEW.KBOU.FW.A.0018.251222T1500Z-251223T0000Z/ 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- 231 PM MST Sun Dec 21 2025 ...FIRE WEATHER WATCH IN EFFECT FROM MONDAY MORNING THROUGH MONDAY AFTERNOON FOR WIND AND LOW RELATIVE HUMIDITY FOR THE FRONT RANGE FOOTHILLS AND SOUTH PARK... FIRE ZONES 214 THROUGH 216... The National Weather Service in Denver has issued a Fire Weather Watch for wind and low relative humidity, which is in effect from Monday morning through Monday afternoon. * AFFECTED AREA...Fire Weather Zones 214, 215 and 216. * TIMING...From Monday morning through Monday afternoon. * WINDS...West 20 to 30 mph with gusts up to 55 mph. * RELATIVE HUMIDITY...As low as 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 Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings. && $$ Action: Continued Issued At: 2025-12-21 20:22:50 070 WWUS85 KBOU 220222 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 722 PM MST Sun Dec 21 2025 ...CRITICAL FIRE WEATHER CONDITIONS POSSIBLE AGAIN MONDAY... .Near record temperatures on Monday, combined with another period of gusty westerly winds across the Front Range foothills will lead to elevated to critical fire weather conditions, especially from the Boulder county foothills south into South Park and the Palmer Divide. COZ239-241-221230- /O.EXA.KBOU.FW.A.0018.251222T1500Z-251223T0000Z/ Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County-Elbert/Central and East Douglas Counties Above 6000 Feet- 722 PM MST Sun Dec 21 2025 ...FIRE WEATHER WATCH IN EFFECT FROM MONDAY MORNING THROUGH MONDAY AFTERNOON FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE ZONES 239 AND 241... The National Weather Service in Denver has issued a Fire Weather Watch for wind and low relative humidity, which is in effect from Monday morning through Monday afternoon. * AFFECTED AREA...Fire Weather Zones 239 and 241. * TIMING...From Monday morning through Monday afternoon. * WINDS...West 15 to 25 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 9 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings. && $$ COZ214>216-221230- /O.CON.KBOU.FW.A.0018.251222T1500Z-251223T0000Z/ 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- 722 PM MST Sun Dec 21 2025 ...FIRE WEATHER WATCH REMAINS IN EFFECT FROM MONDAY MORNING THROUGH MONDAY AFTERNOON FOR WIND AND LOW RELATIVE HUMIDITY FOR THE FRONT RANGE FOOTHILLS AND SOUTH PARK...FIRE ZONES 214 THROUGH 216... * AFFECTED AREA...Fire Weather Zones 214, 215 and 216. * TIMING...From Monday morning through Monday afternoon. * WINDS...West 20 to 30 mph with gusts up to 55 mph. * RELATIVE HUMIDITY...As low as 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 Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings. && $$ Action: Area Extended Issued At: 2025-12-21 20:22:50 070 WWUS85 KBOU 220222 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 722 PM MST Sun Dec 21 2025 ...CRITICAL FIRE WEATHER CONDITIONS POSSIBLE AGAIN MONDAY... .Near record temperatures on Monday, combined with another period of gusty westerly winds across the Front Range foothills will lead to elevated to critical fire weather conditions, especially from the Boulder county foothills south into South Park and the Palmer Divide. COZ239-241-221230- /O.EXA.KBOU.FW.A.0018.251222T1500Z-251223T0000Z/ Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County-Elbert/Central and East Douglas Counties Above 6000 Feet- 722 PM MST Sun Dec 21 2025 ...FIRE WEATHER WATCH IN EFFECT FROM MONDAY MORNING THROUGH MONDAY AFTERNOON FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE ZONES 239 AND 241... The National Weather Service in Denver has issued a Fire Weather Watch for wind and low relative humidity, which is in effect from Monday morning through Monday afternoon. * AFFECTED AREA...Fire Weather Zones 239 and 241. * TIMING...From Monday morning through Monday afternoon. * WINDS...West 15 to 25 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 9 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings. && $$ COZ214>216-221230- /O.CON.KBOU.FW.A.0018.251222T1500Z-251223T0000Z/ 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- 722 PM MST Sun Dec 21 2025 ...FIRE WEATHER WATCH REMAINS IN EFFECT FROM MONDAY MORNING THROUGH MONDAY AFTERNOON FOR WIND AND LOW RELATIVE HUMIDITY FOR THE FRONT RANGE FOOTHILLS AND SOUTH PARK...FIRE ZONES 214 THROUGH 216... * AFFECTED AREA...Fire Weather Zones 214, 215 and 216. * TIMING...From Monday morning through Monday afternoon. * WINDS...West 20 to 30 mph with gusts up to 55 mph. * RELATIVE HUMIDITY...As low as 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 Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings. && $$ Action: Upgraded Issued At: 2025-12-22 02:48:31 752 WWUS85 KBOU 220848 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 148 AM MST Mon Dec 22 2025 ...CRITICAL FIRE WEATHER TODAY... .Near record temperatures today, combined with another period of gusty westerly winds in and near the Front Range foothills will lead to critical fire weather conditions, especially from the Boulder county foothills south into South Park and the Palmer Divide. COZ214>216-221800- /O.UPG.KBOU.FW.A.0018.251222T1500Z-251223T0000Z/ /O.NEW.KBOU.FW.W.0032.251222T1500Z-251223T0000Z/ Central and Southeast Park County- Larimer and Boulder Counties Between 6000 and 9000 Feet- Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- 148 AM MST Mon Dec 22 2025 ...RED FLAG WARNING IN EFFECT FROM 8 AM THIS MORNING TO 5 PM MST THIS AFTERNOON FOR WIND AND LOW RELATIVE HUMIDITY FOR THE FRONT RANGE FOOTHILLS AND SOUTH PARK...FIRE ZONES 214 THROUGH 216... The National Weather Service in Denver has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 8 AM this morning to 5 PM MST this afternoon. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zones 214, 215 and 216. * TIMING...From 8 AM this morning to 5 PM MST this afternoon. * WINDS...West 20 to 30 mph with gusts up to 55 mph. * RELATIVE HUMIDITY...As low as 10 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ239-241-221800- /O.UPG.KBOU.FW.A.0018.251222T1500Z-251223T0000Z/ /O.NEW.KBOU.FW.W.0032.251222T1500Z-251223T0000Z/ Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County-Elbert/Central and East Douglas Counties Above 6000 Feet- 148 AM MST Mon Dec 22 2025 ...RED FLAG WARNING IN EFFECT FROM 8 AM THIS MORNING TO 5 PM MST THIS AFTERNOON FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE ZONES 239 AND 241... The National Weather Service in Denver has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 8 AM this morning to 5 PM MST this afternoon. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zones 239 and 241. * TIMING...From 8 AM this morning to 5 PM MST this afternoon. * WINDS...West 10 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 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. && $$ COZ238-221800- /O.NEW.KBOU.FW.W.0032.251222T1500Z-251223T0000Z/ Larimer County Below 6000 Feet/Northwest Weld County- 148 AM MST Mon Dec 22 2025 ...RED FLAG WARNING IN EFFECT FROM 8 AM THIS MORNING TO 5 PM MST THIS AFTERNOON FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE ZONE 238 ESPECIALLY ACROSS NORTHEAST LARIMER AND NORTHWEST WELD COUNTIES... The National Weather Service in Denver has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 8 AM this morning to 5 PM MST this afternoon. * AFFECTED AREA...Fire Weather Zone 238. * TIMING...From 8 AM this morning to 5 PM MST this afternoon. * WINDS...West 10 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 15 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ Action: Upgraded Issued At: 2025-12-22 02:48:31 752 WWUS85 KBOU 220848 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 148 AM MST Mon Dec 22 2025 ...CRITICAL FIRE WEATHER TODAY... .Near record temperatures today, combined with another period of gusty westerly winds in and near the Front Range foothills will lead to critical fire weather conditions, especially from the Boulder county foothills south into South Park and the Palmer Divide. COZ214>216-221800- /O.UPG.KBOU.FW.A.0018.251222T1500Z-251223T0000Z/ /O.NEW.KBOU.FW.W.0032.251222T1500Z-251223T0000Z/ 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- 148 AM MST Mon Dec 22 2025 ...RED FLAG WARNING IN EFFECT FROM 8 AM THIS MORNING TO 5 PM MST THIS AFTERNOON FOR WIND AND LOW RELATIVE HUMIDITY FOR THE FRONT RANGE FOOTHILLS AND SOUTH PARK...FIRE 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 8 AM this morning to 5 PM MST this afternoon. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zones 214, 215 and 216. * TIMING...From 8 AM this morning to 5 PM MST this afternoon. * WINDS...West 20 to 30 mph with gusts up to 55 mph. * RELATIVE HUMIDITY...As low as 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. && $$ COZ239-241-221800- /O.UPG.KBOU.FW.A.0018.251222T1500Z-251223T0000Z/ /O.NEW.KBOU.FW.W.0032.251222T1500Z-251223T0000Z/ Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County-Elbert/Central and East Douglas Counties Above 6000 Feet- 148 AM MST Mon Dec 22 2025 ...RED FLAG WARNING IN EFFECT FROM 8 AM THIS MORNING TO 5 PM MST THIS AFTERNOON FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE ZONES 239 AND 241... The National Weather Service in Denver has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 8 AM this morning to 5 PM MST this afternoon. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zones 239 and 241. * TIMING...From 8 AM this morning to 5 PM MST this afternoon. * WINDS...West 10 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 9 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ238-221800- /O.NEW.KBOU.FW.W.0032.251222T1500Z-251223T0000Z/ Larimer County Below 6000 Feet/Northwest Weld County- 148 AM MST Mon Dec 22 2025 ...RED FLAG WARNING IN EFFECT FROM 8 AM THIS MORNING TO 5 PM MST THIS AFTERNOON FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE ZONE 238 ESPECIALLY ACROSS NORTHEAST LARIMER AND NORTHWEST WELD COUNTIES... The National Weather Service in Denver has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 8 AM this morning to 5 PM MST this afternoon. * AFFECTED AREA...Fire Weather Zone 238. * TIMING...From 8 AM this morning to 5 PM MST this afternoon. * WINDS...West 10 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 15 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. && $$ | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||