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Home Return to list Heat Advisory 0005 Issued by the Denver / Boulder Forecast Office
Action: Time Extended Issued At: 2026-07-31 12:44:57 402 WWUS75 KBOU 311744 NPWBOU URGENT - WEATHER MESSAGE National Weather Service Denver CO 1144 AM MDT Fri Jul 31 2026 COZ038>043-011200- /O.EXT.KBOU.HT.Y.0005.260802T1800Z-260804T0300Z/ 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- Including the cities of Littleton, Briggsdale, Hereford, Grover, Arvada, Lakewood, Loveland, City of Denver, Elbert, Pawnee Buttes, Denver International Airport, Roggen, Parker, Greeley, Kiowa, Nunn, Stoneham, Highlands Ranch, Castle Rock, Fort Lupton, Aurora, Larkspur, Golden, Fort Collins, Fondis, Longmont, Raymer, Boulder, Eaton, and Brighton 1144 AM MDT Fri Jul 31 2026 ...HEAT ADVISORY NOW IN EFFECT FROM NOON SUNDAY TO 9 PM MDT MONDAY... * WHAT...Temperatures of 98 to 104 on Sunday and Monday, with overnight lows around 65 to 72 Sunday night. * WHERE...Fort Collins, Boulder and the western suburbs of Denver, Denver, Castle Rock, Briggsdale, and Greeley. * WHEN...From noon Sunday to 9 PM MDT Monday. * IMPACTS...Hot temperatures may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. && $$ For more information from the National Weather Service, visit https://weather.gov/bou Hiris Action: Continued Issued At: 2026-08-01 04:48:35 056 WWUS75 KBOU 010948 NPWBOU URGENT - WEATHER MESSAGE National Weather Service Denver CO 348 AM MDT Sat Aug 1 2026 COZ038>043-012130- /O.CON.KBOU.HT.Y.0005.260802T1800Z-260804T0300Z/ Larimer County Below 6000 Feet/Northwest Weld County-Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County-North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County-Elbert/Central and East Douglas Counties Above 6000 Feet-Northeast Weld County-Central and South Weld County- Including the cities of Briggsdale, Roggen, Denver International Airport, Littleton, Eaton, Nunn, Greeley, City of Denver, Golden, Loveland, Hereford, Larkspur, Highlands Ranch, Grover, Parker, Castle Rock, Aurora, Boulder, Fondis, Kiowa, Fort Lupton, Pawnee Buttes, Stoneham, Arvada, Longmont, Lakewood, Raymer, Brighton, Elbert, and Fort Collins 348 AM MDT Sat Aug 1 2026 ...HEAT ADVISORY REMAINS IN EFFECT FROM NOON SUNDAY TO 9 PM MDT MONDAY... * WHAT...Temperatures of 98 to 104 on Sunday and Monday, with overnight lows around 65 to 72 Sunday night. * WHERE...Fort Collins, Boulder and the western suburbs of Denver, Denver, Castle Rock, Briggsdale, and Greeley. * WHEN...From noon Sunday to 9 PM MDT Monday. * IMPACTS...Hot temperatures may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. && $$ For more information from the National Weather Service, visit https://weather.gov/bou MAI Action: Continued Issued At: 2026-08-01 14:03:20 033 WWUS75 KBOU 011903 NPWBOU URGENT - WEATHER MESSAGE National Weather Service Denver CO 103 PM MDT Sat Aug 1 2026 COZ038>043-020915- /O.CON.KBOU.HT.Y.0005.260802T1800Z-260804T0300Z/ 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- Including the cities of Briggsdale, Loveland, Larkspur, Greeley, Parker, Brighton, Kiowa, Raymer, Denver International Airport, Littleton, Fort Lupton, Elbert, Eaton, Fort Collins, Fondis, City of Denver, Aurora, Boulder, Pawnee Buttes, Lakewood, Stoneham, Golden, Highlands Ranch, Hereford, Longmont, Arvada, Castle Rock, Grover, Nunn, and Roggen 103 PM MDT Sat Aug 1 2026 ...HEAT ADVISORY REMAINS IN EFFECT FROM NOON SUNDAY TO 9 PM MDT MONDAY... * WHAT...Temperatures of 98 to 104 on Sunday and 96 to 101 on Monday. * WHERE...Fort Collins, Boulder and the western suburbs of Denver, Denver, Castle Rock, Briggsdale, and Greeley. * WHEN...From noon Sunday to 9 PM MDT Monday. * IMPACTS...Hot temperatures may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. && $$ For more information from the National Weather Service, visit https://weather.gov/bou AP Action: Continued Issued At: 2026-08-02 03:55:34 546 WWUS75 KBOU 020855 NPWBOU URGENT - WEATHER MESSAGE National Weather Service Denver CO 255 AM MDT Sun Aug 2 2026 COZ038>043-022300- /O.CON.KBOU.HT.Y.0005.260802T1800Z-260804T0300Z/ Larimer County Below 6000 Feet/Northwest Weld County-Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County-North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County-Elbert/Central and East Douglas Counties Above 6000 Feet-Northeast Weld County-Central and South Weld County- Including the cities of Roggen, Kiowa, Golden, Lakewood, Denver International Airport, Castle Rock, Pawnee Buttes, Hereford, Fondis, Eaton, Fort Collins, Fort Lupton, Brighton, Longmont, Boulder, City of Denver, Littleton, Grover, Elbert, Highlands Ranch, Briggsdale, Raymer, Aurora, Loveland, Parker, Arvada, Stoneham, Greeley, Larkspur, and Nunn 255 AM MDT Sun Aug 2 2026 ...HEAT ADVISORY REMAINS IN EFFECT FROM NOON TODAY TO 9 PM MDT MONDAY... * WHAT...Temperatures of 98 to 104 on Sunday and 96 to 101 on Monday. * WHERE...Fort Collins, Boulder and the western suburbs of Denver, Denver, Castle Rock, Briggsdale, and Greeley. * WHEN...From noon today to 9 PM MDT Monday. * IMPACTS...Hot temperatures may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. && $$ For more information from the National Weather Service, visit https://weather.gov/bou 09 Action: Time Extended Issued At: 2026-08-02 13:04:50 267 WWUS75 KBOU 021804 NPWBOU URGENT - WEATHER MESSAGE National Weather Service Denver CO 1204 PM MDT Sun Aug 2 2026 COZ038>043-030500- /O.EXT.KBOU.HT.Y.0005.000000T0000Z-260804T0000Z/ 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- Including the cities of Denver International Airport, Highlands Ranch, Longmont, Elbert, Grover, Fort Lupton, Littleton, Parker, Boulder, Pawnee Buttes, Roggen, Aurora, Larkspur, Raymer, Briggsdale, Fondis, Lakewood, Eaton, Golden, Brighton, Greeley, Kiowa, Loveland, City of Denver, Arvada, Fort Collins, Nunn, Hereford, Stoneham, and Castle Rock 1204 PM MDT Sun Aug 2 2026 ...HEAT ADVISORY NOW IN EFFECT UNTIL 6 PM MDT MONDAY... * WHAT...Temperatures of 98 to 105 today and 96 to 103 on Monday. * WHERE...Fort Collins, Boulder and the western suburbs of Denver, Denver, Castle Rock, Briggsdale, and Greeley. * WHEN...Until 6 PM MDT Monday. * IMPACTS...Hot temperatures may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. && $$ For more information from the National Weather Service, visit https://weather.gov/bou AP Action: Continued Issued At: 2026-08-03 01:48:39 453 WWUS75 KBOU 030648 NPWBOU URGENT - WEATHER MESSAGE National Weather Service Denver CO 1248 AM MDT Mon Aug 3 2026 COZ038>043-040000- /O.CON.KBOU.HT.Y.0005.000000T0000Z-260804T0000Z/ Larimer County Below 6000 Feet/Northwest Weld County-Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County-North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County-Elbert/Central and East Douglas Counties Above 6000 Feet-Northeast Weld County-Central and South Weld County- Including the cities of Grover, Roggen, Boulder, Larkspur, Pawnee Buttes, Briggsdale, Castle Rock, Hereford, Parker, Longmont, Elbert, Denver International Airport, Arvada, Eaton, City of Denver, Fort Collins, Lakewood, Fondis, Nunn, Brighton, Loveland, Kiowa, Raymer, Greeley, Highlands Ranch, Aurora, Fort Lupton, Littleton, Golden, and Stoneham 1248 AM MDT Mon Aug 3 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT THIS EVENING... * WHAT...Hot temperatures ranging from 95 to 102 degrees. * WHERE...Fort Collins, Boulder and the western suburbs of Denver, Denver, Castle Rock, Briggsdale, and Greeley. * WHEN...Until 6 PM MDT this evening. * IMPACTS...Hot temperatures may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. && $$ For more information from the National Weather Service, visit https://weather.gov/bou 09 Action: Expired Issued At: 2026-08-03 18:59:29 338 WWUS75 KBOU 032358 NPWBOU URGENT - WEATHER MESSAGE National Weather Service Denver CO 558 PM MDT Mon Aug 3 2026 COZ038>043-040100- /O.EXP.KBOU.HT.Y.0005.000000T0000Z-260804T0000Z/ 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- Including the cities of Fondis, Pawnee Buttes, Roggen, Denver International Airport, Kiowa, Arvada, City of Denver, Boulder, Loveland, Parker, Nunn, Elbert, Lakewood, Stoneham, Golden, Greeley, Longmont, Littleton, Eaton, Larkspur, Castle Rock, Fort Lupton, Fort Collins, Hereford, Briggsdale, Grover, Raymer, Aurora, Highlands Ranch, and Brighton 558 PM MDT Mon Aug 3 2026 ...HEAT ADVISORY WILL EXPIRE AT 6 PM MDT THIS EVENING... Temperatures have dropped into the 80s and low 90s behind the cold front. $$ For more information from the National Weather Service, visit https://weather.gov/bou MV | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||