Extreme Heat Warning
URGENT - WEATHER MESSAGE
National Weather Service Grand Junction CO
1210 AM MDT Mon Jul 13 2026
COZ001-002-006-007-UTZ024-027-140600-
/O.CON.KGJT.XH.W.0001.000000T0000Z-260714T0600Z/
Lower Yampa River Basin-Central Yampa River Basin-Grand Valley-
Debeque to Silt Corridor-Eastern Uinta Basin-Arches/Grand Flat-
Including the cities of Rangely, Dinosaur, Dinosaur National
Monument, Craig, Hayden, Meeker, Grand Junction, Fruita, Palisade,
Colorado National Monument, Whitewater, Collbran, De Beque, New
Castle, Mesa, Parachute, Rifle, Silt, Vernal, Jensen, Ballard, Fort
Duchesne, Randlett, Moab, Arches National Park, Castle Valley, and
Thompson Springs
1210 AM MDT Mon Jul 13 2026
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT
TONIGHT...
* WHAT...Dangerously hot conditions with afternoon temperatures as
high as 100 to 106 expected.
* WHERE...In Colorado, Central Yampa River Basin, Lower Yampa River
Basin, Debeque to Silt Corridor, and Grand Valley. In Utah,
Arches/Grand Flat and Eastern Uinta Basin.
* WHEN...Until midnight MDT tonight.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.
* ADDITIONAL DETAILS...Near record temperatures are possible
especially Sunday into Monday during the peak of this event.
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.
&&
$$
GF
URGENT - WEATHER MESSAGE
National Weather Service Riverton WY
1110 AM MDT Sun Jul 12 2026
WYZ003>006-010-011-013-016>020-023-025>030-131300-
/O.EXT.KRIW.XH.W.0001.000000T0000Z-260715T0300Z/
Cody Foothills-North Bighorn Basin-Southwest Bighorn Basin-
Southeast Bighorn Basin-Northeast Johnson County-Southeast
Johnson County-Jackson Hole-Upper Wind River Basin-Wind River
Basin-Lander Foothills-Green Mountains and Rattlesnake Range-
Natrona County Lower Elevations-Star Valley-Upper Green River
Basin Foothills-Upper Green River Basin-South Lincoln County-Rock
Springs and Green River-Flaming Gorge-East Sweetwater County-
Including the cities of Buffalo, Shoshoni, Farson, Shell, Thayne,
Jackson, Cokeville, Clark, Dubois, Star Valley Ranch, Ten Sleep,
Riverton, La Barge, Alpine, Greybull, Worland, Afton, Powell, Rock
Springs, Cody, Green River, Jeffrey City, Kemmerer, Kaycee, Pinedale,
Casper, Lander, Lovell, Meeteetse, Big Piney, Wamsutter, Basin, and
Thermopolis
1110 AM MDT Sun Jul 12 2026
...EXTREME HEAT WARNING NOW IN EFFECT UNTIL 9 PM MDT TUESDAY...
* WHAT...Dangerously hot conditions with temperatures from 100 to 110
degrees below 6,000 feet and 90 to 100 degrees between 6,000 and
7,000 feet each day.
* WHERE...Portions of central, north central, northwest, south
central, southwest, and west central Wyoming.
* WHEN...Until 9 PM MDT Tuesday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
&&
$$
Lowe
Red Flag Warning
URGENT - FIRE WEATHER MESSAGE
National Weather Service Cheyenne WY
1132 PM MDT Sun Jul 12 2026
.RED FLAG Warning was extended through Wednesday.
NEZ434-WYZ417>420-423-427-430>433-140000-
/O.EXT.KCYS.FW.W.0031.000000T0000Z-260716T0200Z/
Pine Ridge/Nebraska National Forest-
Niobrara/Lower Elevations of Converse/Thunder Basin National
Grassland-
Middle North Platte River Basin/Niobrara and Converse High Plains-
North Laramie Range and Adjacent High Plains-
North Laramie Valley/Shirley Basin-Southwest Carbon County-
North Snowy Range Foothills-Laramie Foothills and High Plains-
Laramie East High Plains-Bordeaux/Chugwater/Wheatland-
Goshen/Middle-Lower North Platte River Basin-
1132 PM MDT Sun Jul 12 2026
...RED FLAG WARNING NOW IN EFFECT UNTIL 8 PM MDT WEDNESDAY FOR LOW RH,
CRITICAL FUELS, AND BREEZY WINDS FOR FIRE WEATHER ZONES 417, 418,
419, 420, 423, 427, 430, 431, 432, 433, AND 434...
* AFFECTED AREA...Fire weather zones 417, 418, 423, and 430
through 434.
* WIND...South 10 to 15 mph gusting up to 35 mph
* HUMIDITY...Between 10 and 15 percent
* IMPACTS...any fires that develop will likely spread rapidly.
Outdoor burning is not recommended.
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.
&&
$$
URGENT - FIRE WEATHER MESSAGE
National Weather Service Cheyenne WY
1132 PM MDT Sun Jul 12 2026
.RED FLAG Warning was extended through Wednesday.
NEZ435>437-140000-
/O.EXB.KCYS.FW.W.0031.000000T0000Z-260716T0200Z/
Box Butte/South Sioux/Niobrara River-
Lower North Platte River Basin/Scottsbluff National Monument-
Lodgepole Creek/Southern Nebraska Panhandle-
1132 PM MDT Sun Jul 12 2026
...RED FLAG WARNING IN EFFECT UNTIL 8 PM MDT WEDNESDAY FOR LOW RH,
CRITICAL FUELS, AND BREEZY WINDS FOR FIRE WEATHER ZONES 435, 436,
AND 437...
The National Weather Service in Cheyenne has issued a Red Flag
Warning, which is in effect until 8 PM MDT Wednesday.
* AFFECTED AREA...Fire weather zones 417, 418, 423, and 430
through 434.
* WIND...South 10 to 15 mph gusting up to 35 mph
* HUMIDITY...Between 10 and 15 percent
* IMPACTS...any fires that develop will likely spread rapidly.
Outdoor burning is not recommended.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. A combination of
strong winds, low relative humidity, and warm temperatures can
contribute to extreme fire behavior.
&&
$$
URGENT - FIRE WEATHER MESSAGE
National Weather Service Rapid City SD
901 PM MDT Sun Jul 12 2026
...RED FLAG WARNING HAS EXPIRED FOR NORTHERN CAMPBELL, SOUTHERN
CAMPBELL, CROOK COUNTY PLAINS, AND WESTON COUNTY PLAINS...
...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT TUESDAY DUE TO
GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FALL RIVER COUNTY AREA,
NORTHERN FOOT HILLS, EASTERN FOOT HILLS, CUSTER COUNTY PLAINS, PINE
RIDGE AREA, BUTTE COUNTY AREA, PERKINS COUNTY, WEST CENTRAL PLAINS,
ZIEBACH COUNTY, HAAKON COUNTY AREA, AND BADLANDS AREA...
...
SDZ322>332-131115-
/O.CON.KUNR.FW.W.0028.000000T0000Z-260715T0300Z/
Fall River County Area-Northern Foot Hills-Eastern Foot Hills-
Custer County Plains-Pine Ridge Area-Butte County Area-Perkins
County-West Central Plains-Ziebach County-Haakon County Area-
Badlands Area-
901 PM MDT Sun Jul 12 2026
...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT TUESDAY...
* AFFECTED AREA...Fire Weather Zones 322, 323, 324, 325, 326, 327,
328, 329, 330, 331, and 332.
* TIMING...Until 9 PM MDT Tuesday.
* WINDS...South winds 15 to 25 mph with gusts up to 35 mph.
* RELATIVE HUMIDITY...Relative Humidity as low as 14 percent.
* IMPACTS...Any fires that develop will spread rapidly. Outdoor
burning is not recommended.
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.
&&
$$
Helgeson
Heat Advisory
URGENT - WEATHER MESSAGE
National Weather Service Cheyenne WY
1123 PM MDT Sun Jul 12 2026
NEZ002-003-019>021-054-055-095-096-WYZ101-102-107-108-118-119-132100-
/O.EXT.KCYS.HT.Y.0001.000000T0000Z-260716T0600Z/
Dawes County-Box Butte County-Scotts Bluff County-Banner County-
Morrill County-Kimball County-Cheyenne County-Northern Sioux
County-Southern Sioux County-Converse County Lower Elevations-
Niobrara County-East Platte County-Goshen County-Central Laramie
County-East Laramie County-
Including the cities of Sidney, Glenrock, Chadron, Harrison,
Bridgeport, Bayard, Douglas, Wheatland, Hemingford, Redbird,
Angora, Redington, Agate, Gering, Chadron St Park, Lusk,
Torrington, Deer Creek, Scottsbluff, Bill, Pine Bluffs, Alliance,
Harrisburg, Cheyenne, Guernsey, Kimball, and Brownson
1123 PM MDT Sun Jul 12 2026
...HEAT ADVISORY NOW IN EFFECT UNTIL MIDNIGHT MDT WEDNESDAY NIGHT...
* WHAT...Afternoon temperatures will be near or exceed 100 degrees
with overnight temperatures dipping to between 65 to 70, providing
little relief.
* WHERE...Portions of panhandle Nebraska and east central and
southeast Wyoming.
* WHEN...Until midnight MDT Wednesday Night.
* IMPACTS...Hot temperatures and poor hydration may cause heat
illnesses or injuries.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
Do not leave young children and pets in unattended vehicles. Car
interiors will reach lethal temperatures in a matter of minutes.
&&
$$
MM
URGENT - WEATHER MESSAGE
National Weather Service Denver CO
111 PM MDT Sun Jul 12 2026
COZ038>040-131200-
/O.NEW.KBOU.HT.Y.0001.260713T1600Z-260714T0300Z/
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-
Including the cities of Aurora, Denver International Airport,
Lakewood, Longmont, City of Denver, Nunn, Hereford, Brighton,
Highlands Ranch, Littleton, Golden, Arvada, Parker, Fort Collins,
Boulder, and Loveland
111 PM MDT Sun Jul 12 2026
...HEAT ADVISORY IN EFFECT FROM 10 AM TO 9 PM MDT MONDAY...
* WHAT...High temperatures in the upper 90s.
* WHERE...Fort Collins, Boulder and the western suburbs of Denver,
and Denver.
* WHEN...From 10 AM 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.
To reduce risk during outdoor work, the Occupational Safety and
Health Administration recommends scheduling frequent rest breaks in
shaded or air conditioned environments. Anyone overcome by heat
should be moved to a cool and shaded location. Heat stroke is an
emergency! Call 9 1 1.
&&
$$
For more information from the National Weather Service, visit
https://weather.gov/bou
20
URGENT - WEATHER MESSAGE
National Weather Service Rapid City SD
1131 AM MDT Sun Jul 12 2026
SDZ001-002-012>014-025>027-030>032-041>044-046-047-049-072>078-
WYZ054>056-058>060-131215-
/O.EXT.KUNR.HT.Y.0001.000000T0000Z-260717T0300Z/
Harding-Northern Perkins-Butte-Northern Meade Co Plains-Ziebach-
Northern Foothills-Rapid City-Southern Foothills-Custer Co Plains-
Pennington Co Plains-Haakon-Western Fall River-Northern Oglala
Lakota-Northern Jackson-Bennett-Mellette-Todd-Tripp-
Sturgis/Piedmont Foothills-Southern Meade Co Plains-Hermosa
Foothills-Eastern Fall River-Southern Oglala Lakota-Southern
Jackson-Southern Perkins-Northern Campbell-Southern Campbell-
Western Crook-Weston County Plains-Newcastle-Northeastern Crook-
Including the cities of Wanblee, Aladdin, Angostura Reservoir, Glad
Valley, Kyle, Buffalo Gap, Howes, Folsom, Cedar Butte, Hot Springs,
Interior, Sorum, Pine Ridge, Moorcroft, Ideal, Ladner, Weston, Faith,
Wright, Rumford, Enning, Mud Butte, Batesland, Lemmon, Clareton,
Belvidere, Spearfish, Rochelle, Rosebud, Colony, Pine Haven, Wasta,
Porcupine, Smithwick, Midland, Oglala, Edgemont, Black Hawk, Quinn,
Saint Francis, Rockyford, Colome, Oral, Ludlow, Hoover, Allen,
Prairie City, Summerset, Caputa, Philip, Rapid City, Zeona, Wall,
Hermosa, Provo, Kadoka, Fruitdale, Fairburn, Elm Springs, Vale, White
River, Usta, Sharps Corner, Box Elder, Norris, Upton, Union Center,
Harrington, Mission, Saint Onge, Oelrichs, Sturgis, Cherry Creek,
Winner, Newcastle, White Owl, Tuthill, Osage, Parmelee, Camp Crook,
Long Valley, Reva, Belle Fourche Reservoir, Recluse, Red Owl, Witten,
Milesville, Meadow, Newell, Belle Fourche, Wood, Potato Creek,
Dupree, South Eagle Butte, Martin, Buffalo, Ardmore, Cottonwood,
Wounded Knee, New Underwood, Rozet, Keyhole Reservoir, Beulah, Redig,
Ellsworth AFB, Whitewood, Gillette, Tilford, Shadehill, Devils Tower,
Scenic, Bison, Opal, Hamill, Hulett, Piedmont, and Manderson
1131 AM MDT Sun Jul 12 2026 /1231 PM CDT Sun Jul 12 2026/
...HEAT ADVISORY NOW IN EFFECT UNTIL 9 PM MDT /10 PM CDT/ THURSDAY...
* WHAT...Heat index values up to 105.
* WHERE...Portions of northwestern, south central, and southwestern
South Dakota and northeast Wyoming.
* WHEN...Until 9 PM MDT /10 PM CDT/ Thursday.
* IMPACTS...Hot temperatures and high humidity may cause heat
illnesses.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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.
&&
$$
Calderon
Air Quality Alert
COC035-031-013-005-059-001-014-123-069-132200-
Douglas-Denver-Boulder-Arapahoe-Jefferson-Adams-Broomfield-
Weld-Larimer-
410 PM MDT Sun Jul 12 2026
...OZONE ACTION DAY ALERT FROM 400 PM SUNDAY UNTIL 400 PM
MONDAY...
The Colorado Department of Public Health and Environment has
issued the following...
WHAT...Ozone Action Day Alert.
WHERE...Douglas, Jefferson, Denver, western Arapahoe, western
Adams, Broomfield, Boulder, Larimer, and Weld Counties
WHEN...400 PM Sunday July 12 to 400 PM Monday July 13
IMPACTS...Ozone Action Day Alert is now in effect for the Front
Range Urban Corridor. Hot and sunny weather will allow ozone to
reach the Unhealthy for Sensitive Groups category on Sunday and
Monday. For Colorado air quality conditions, forecasts, and
advisories, visit:
https://www.colorado.gov/airquality/colorado_summary.aspx If
possible, please help us reduce ozone pollution by limiting
driving gas and diesel-powered vehicles until at least 4 p.m.
Monday, July 13, 2026. Colorado is also addressing ozone pollution
through state policies. For more information about health impacts
and how ozone pollution forms in Colorado, visit:
https://cdphe.colorado.gov/ozone- pollution-and-your-health
HEALTH INFORMATION...Increasing likelihood of respiratory symptoms
and breathing discomfort in active children and adults and people
with lung disease, such as asthma. Active children and adults, and
people with lung disease, such as asthma, should reduce prolonged
or heavy outdoor exertion.
$$
Hazardous Weather Outlook
Hazardous Weather Outlook
National Weather Service North Platte NE
226 PM CDT Sun Jul 12 2026
NEZ004>010-022>029-035>038-056>059-069>071-094-131930-
Sheridan-Eastern Cherry-Keya Paha-Boyd-Brown-Rock-Holt-Garden-Grant-
Hooker-Thomas-Blaine-Loup-Garfield-Wheeler-Arthur-McPherson-Logan-
Custer-Deuel-Keith-Perkins-Lincoln-Chase-Hayes-Frontier-
Western Cherry-
226 PM CDT Sun Jul 12 2026 /126 PM MDT Sun Jul 12 2026/
This Hazardous Weather Outlook is for portions of western and north
central Nebraska.
.DAY ONE...Tonight.
Hazardous weather is not expected at this time.
.DAYS TWO THROUGH SEVEN...Monday through Saturday.
Hotter temperatures are expected heading into next week with
consecutive days of afternoon highs in the upper 90s to low 100s
Monday through Saturday. Those sensitive to excessive heat should
continue to monitor later forecasts for additional details.
Hot, dry, & windy conditions may lead to a return to near critical
fire weather conditions this week especially across the Sandhills and
Panhandle.
.SPOTTER INFORMATION STATEMENT...
Spotter activation is not expected at this time.
$$
