Cheyenne, Wyoming

Regional Weather Alerts


     

Alert: Red Flag Warning
Area(s): North Bighorn Basin/Worland BLM; Cody Foothills; South Bighorn Basin/Worland BLM; Upper Wind River Basin/Wind River Basin; South Bighorn Mountains
Effective: 2026-08-02 @ 2:30 pm -> 2026-08-02 @ 10:00 pm
Onset: 2026-08-02 @ 2:30 pm -> 2026-08-02 @ 10:00 pm
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Riverton WY on 2026-08-02 @ 2:30 pm
Headline: Red Flag Warning issued August 2 at 1:30PM MDT until August 2 at 9:00PM MDT by NWS Riverton WY
Description: * IMPACTS: Low Humidity, Hot Temperatures, and Gusty Westerly Wind
could cause erratic fire behavior.

* AFFECTED AREA:
In Central WY Fire Zones...283...285.
In North Central WY Fire Zones...275...276...282.

* COUNTIES AFFECTED:
In Central WY...Fremont...Natrona.
In North Central WY...Big Horn...Hot Springs...Johnson...Park
Washakie.

* WIND: Westerly 10 to 20 mph with gusts to around 30 mph.

* HUMIDITY: 5 to 10 percent.

* TEMPERATURES: Highs in the upper 90s to lower 100s.

Alert: Red Flag Warning
Area(s): Lincoln and Uinta Counties/Lower Elevations; Upper Green River Basin/Rock Springs BLM; Sweetwater County/Rock Springs BLM/Flaming Gorge NRA; Granite/Green/Ferris/Rattlesnake Mountains
Effective: 2026-08-02 @ 2:30 pm -> 2026-08-02 @ 10:00 pm
Onset: 2026-08-02 @ 2:30 pm -> 2026-08-03 @ 10:00 pm
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Riverton WY on 2026-08-02 @ 2:30 pm
Headline: Red Flag Warning issued August 2 at 1:30PM MDT until August 3 at 9:00PM MDT by NWS Riverton WY
Description: * IMPACTS: Low Humidity, Hot Temperatures, and Gusty Westerly Wind
could cause erratic fire behavior.

* AFFECTED AREA:
In Central WY Fire Zone....289.
In Southwest WY Fire Zones...277...279.
In West Central WY Fire Zone....278.

* COUNTIES AFFECTED:
In Central WY...Fremont...Natrona.
In Southwest WY...Sweetwater...Uinta.
In West Central WY...Lincoln...Sublette.

* WIND: Westerly wind 10 to 20 mph with gusts up to 30 mph Sunday.
West-northwest wind 15 to 25 mph with gusts up to 35 mph Monday.

* HUMIDITY: 5 to 10 percent Sunday, and 8 to 13 percent Monday.

* TEMPERATURES: Highs around 90 Sunday, and in the 80s Monday.
Sunday Night low temperatures in the 50s.

Alert: Heat Advisory
Area(s): Kimball; Cheyenne; Central Laramie County; East Laramie County
Effective: 2026-08-02 @ 12:56 pm -> 2026-08-02 @ 10:00 pm
Onset: 2026-08-02 @ 12:56 pm -> 2026-08-02 @ 10:00 pm
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Cheyenne WY on 2026-08-02 @ 12:56 pm
Headline: Heat Advisory issued August 2 at 11:56AM MDT until August 2 at 9:00PM MDT by NWS Cheyenne WY
Description: * WHAT...High temperatures between 97 and 103 degrees.

* WHERE...In Nebraska, Cheyenne County and Kimball County. In
Wyoming, Central Laramie County and East Laramie County.

* WHEN...Until 9 PM MDT this evening.

* IMPACTS...Hot temperatures may cause heat illnesses.

Alert: Heat Advisory
Area(s): Ferris/Seminoe/Shirley Mountains; Central Carbon County; Southwest Carbon County
Effective: 2026-08-02 @ 12:56 pm -> 2026-08-02 @ 10:00 pm
Onset: 2026-08-02 @ 12:56 pm -> 2026-08-02 @ 10:00 pm
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Cheyenne WY on 2026-08-02 @ 12:56 pm
Headline: Heat Advisory issued August 2 at 11:56AM MDT until August 2 at 9:00PM MDT by NWS Cheyenne WY
Description: * WHAT...High temperatures between 95 and 100 degrees.

* WHERE...Central Carbon County, Ferris/Seminoe/Shirley Mountains,
and Southwest Carbon County.

* WHEN...Until 9 PM MDT this evening.

* IMPACTS...Hot temperatures may cause heat illnesses.

Alert: Heat Advisory
Area(s): Dawes; Box Butte; Scotts Bluff; Banner; Morrill; North Sioux; South Sioux; Converse County Lower Elevations; Niobrara County; East Platte County; Goshen County
Effective: 2026-08-02 @ 12:56 pm -> 2026-08-02 @ 10:00 pm
Onset: 2026-08-02 @ 12:56 pm -> 2026-08-02 @ 10:00 pm
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Cheyenne WY on 2026-08-02 @ 12:56 pm
Headline: Heat Advisory issued August 2 at 11:56AM MDT until August 2 at 9:00PM MDT by NWS Cheyenne WY
Description: * WHAT...High temperatures between 103 to 108 degrees.

* WHERE...Portions of panhandle Nebraska and east central and
southeast Wyoming.

* WHEN...Until 9 PM MDT this evening.

* IMPACTS...Hot temperatures may cause heat illnesses.

Alert: Red Flag Warning
Area(s): North Laramie Valley/Shirley Basin; Upper North Platte River Basin; North Snowy Range Foothills
Effective: 2026-08-02 @ 12:51 pm -> 2026-08-03 @ 7:00 am
Onset: 2026-08-02 @ 1:00 pm -> 2026-08-03 @ 10:00 pm
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Cheyenne WY on 2026-08-02 @ 12:51 pm
Headline: Red Flag Warning issued August 2 at 11:51AM MDT until August 3 at 9:00PM MDT by NWS Cheyenne WY
Description: The National Weather Service in Cheyenne has issued a Red Flag
Warning, which is in effect until 9 PM MDT Monday.

* AFFECTED AREA...Fire weather zones 420, 425, and 427.

* WIND...Southwest to west winds Sunday, becoming west to
northwest Monday, at 10 to 20 mph with gusts up to 30 mph.

* HUMIDITY...5 to 10 percent Sunday; overnight recoveries 20 to 30
percent; 8 to 12 percent Monday.

* IMPACTS...any fires that develop will likely spread rapidly.
Outdoor burning is not recommended.

Alert: Red Flag Warning
Area(s): Niobrara/Lower Elevations of Converse/Thunder Basin National Grassland; Middle North Platte River Basin/Niobrara and Converse High Plains; Laramie Foothills and High Plains; Laramie East High Plains; Bordeaux/Chugwater/Wheatland; Goshen/Middle-Lower North Platte River Basin
Effective: 2026-08-02 @ 12:51 pm -> 2026-08-03 @ 7:00 am
Onset: 2026-08-03 @ 12:00 pm -> 2026-08-03 @ 10:00 pm
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Cheyenne WY on 2026-08-02 @ 12:51 pm
Headline: Red Flag Warning issued August 2 at 11:51AM MDT until August 3 at 9:00PM MDT by NWS Cheyenne WY
Description: The National Weather Service in Cheyenne has issued a Red Flag
Warning, which is in effect from 11 AM to 9 PM MDT Monday.

* AFFECTED AREA...Fire weather zones 417 through 418, and 430
through 433.

* WIND...North winds 10 to 20 mph with gusts up to 35 mph.

* HUMIDITY...10 to 20 percent.

* IMPACTS...any fires that develop will likely spread rapidly.
Outdoor burning is not recommended.

Alert: Red Flag Warning
Area(s): Ferris/Seminoe/Shirley Mountains; Central and West Carbon; Southwest Carbon County
Effective: 2026-08-02 @ 12:51 pm -> 2026-08-03 @ 7:00 am
Onset: 2026-08-02 @ 1:00 pm -> 2026-08-03 @ 10:00 pm
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Cheyenne WY on 2026-08-02 @ 12:51 pm
Headline: Red Flag Warning issued August 2 at 11:51AM MDT until August 3 at 9:00PM MDT by NWS Cheyenne WY
Description: * AFFECTED AREA...Fire weather zones 421 through 423.

* WIND...Southwest to west winds Sunday, becoming west to
northwest Monday, at 10 to 20 mph with gusts up to 30 mph.

* HUMIDITY...5 to 10 percent Sunday; overnight recoveries 20 to 30
percent; 8 to 15 percent Monday.

* IMPACTS...any fires that develop will likely spread rapidly.
Outdoor burning is not recommended.

Alert: Red Flag Warning
Area(s): 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; Bennett County Area; Weston County Plains
Effective: 2026-08-02 @ 12:19 pm -> 2026-08-02 @ 8:30 pm
Onset: 2026-08-03 @ 12:00 pm -> 2026-08-03 @ 9:00 pm
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Rapid City SD on 2026-08-02 @ 12:19 pm
Headline: Red Flag Warning issued August 2 at 11:19AM MDT until August 3 at 8:00PM MDT by NWS Rapid City SD
Description: ...RED FLAG WARNING IN EFFECT FROM 11 AM TO 8 PM MDT MONDAY 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, BADLANDS AREA, BENNETT COUNTY
AREA, AND WESTON COUNTY PLAINS...

The National Weather Service in Rapid City SD has issued a Red Flag
Warning.

* AFFECTED AREA...Fire Weather Zones 317, 322, 323, 324, 325, 326,
327, 328, 329, 330, 331, 332, and 333.

* TIMING...From 11 AM to 8 PM MDT Monday.

* WINDS...North winds 20 to 30 mph with gusts up to 45 mph.

* RELATIVE HUMIDITY...Relative Humidity between 18 to 25 percent.

* IMPACTS...Any fires that develop will spread rapidly. Outdoor
burning is not recommended.

Alert: Red Flag Warning
Area(s): Gallatin National Forest; Wheatland County/Sweet Grass County; Stillwater County; Beartooth Ranger District Custer National Forest; Golden Valley County/Musselshell County; Yellowstone County; Crow Indian Reservation/Big Horn Canyon Rec Area; Northern Rosebud/Northern Treasure Counties; Northern Cheyenne Indian Reservation/Ashland Ranger District Custer Natl Forest; Custer County; Sioux Ranger District Custer National Forest; Sheridan County/Casper BLM; Bighorn National Forest
Effective: 2026-08-02 @ 2:14 am -> 2026-08-02 @ 10:00 pm
Onset: 2026-08-02 @ 2:14 am -> 2026-08-02 @ 10:00 pm
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Billings MT on 2026-08-02 @ 2:14 am
Headline: Red Flag Warning issued August 2 at 1:14AM MDT until August 2 at 9:00PM MDT by NWS Billings MT
Description: * IMPACTS: Low humidities, hot temperatures, gusty winds, and wind
shifts with two cold fronts will create erratic fire behavior.

* AFFECTED AREA:
In North Central WY Fire Zones...274...284.
In South Central MT Fire Zones...123...124...125...126...127
128...129.
In Southeast MT Fire Zones...130...131...132.
In Southeast MT and Northwest SD Fire Zone...133.

* COUNTIES AFFECTED:
In Central MT...Golden Valley...Musselshell...Wheatland.
In North Central WY...Big Horn...Johnson...Sheridan...Washakie.
In Northwest SD...Harding.
In South Central MT...Big Horn...Carbon...Park...Stillwater
Sweet Grass...Yellowstone.
In Southeast MT...Carter...Custer...Fallon...Powder River
Rosebud...Treasure.
In Southwest MT...Gallatin.

* WIND: Northwest 10 to 15 with gusts to 25 mph along and behind a
cold front tonight into Sunday morning. Winds become east over
the plains and southwest over the mountains Sunday afternoon.
Northeast winds will get gusty again this evening as another cold
front moves through the region.

* HUMIDITY: In the Teens.

* TEMPERATURES: Mid 90s.

* COLD FRONT: A cold front will move through the area overnight
into mid morning. Another push of cooler air arrives early this
evening.

Alert: Heat Advisory
Area(s): 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
Effective: 2026-08-02 @ 1:35 am -> 2026-08-02 @ 11:00 pm
Onset: 2026-08-02 @ 1:35 am -> 2026-08-02 @ 11:00 pm
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Riverton WY on 2026-08-02 @ 1:35 am
Headline: Heat Advisory issued August 2 at 12:35AM MDT until August 2 at 10:00PM MDT by NWS Riverton WY
Description: * WHAT...Hot temperatures expected today. Highs from 98 to 105 below
5800 feet, 90 to 98 above 5800 feet.

* WHERE...Portions of central, north central, northwest, south
central, southwest, and west central Wyoming.

* WHEN...Until 10 PM MDT this evening.

* IMPACTS...Heat related illnesses increase during extreme heat
events.