Cheyenne, Wyoming

Regional Weather Alerts


     

Alert: Red Flag Warning
Area(s): 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; Sheridan County/Casper BLM; Bighorn National Forest
Effective: 2026-08-01 @ 3:44 pm -> 2026-08-02 @ 3:45 pm
Onset: 2026-08-02 @ 1:00 am -> 2026-08-02 @ 10:00 pm
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Billings MT on 2026-08-01 @ 3:44 pm
Headline: Red Flag Warning issued August 1 at 2:44PM MDT until August 2 at 9:00PM MDT by NWS Billings MT
Description: * IMPACTS: Low humidities, hot temperatures, gusty winds, and a
wind shift with a cold front will create erratic fire behavior.

* AFFECTED AREA:
In North Central WY Fire Zones...274...284.
In South Central MT Fire Zone...129.
In Southeast MT Fire Zones...130...131...132.

* COUNTIES AFFECTED:
In North Central WY...Big Horn...Johnson...Sheridan...Washakie.
In South Central MT...Big Horn...Carbon...Yellowstone.
In Southeast MT...Custer...Powder River...Rosebud...Treasure.

* COLD FRONT: A cold front moves through tonight into early Sunday
morning shifting winds to the northwest and increasing wind
speeds.

* WIND: South 10 to 20 mph ahead of the front becoming northwest 10
to 20 mph with gusts up to 35 mph along and behind the front.
Winds become northeast to east Sunday afternoon.

* HUMIDITY: 20 to 35 percent Sunday morning becoming as low as 10
percent Sunday afternoon.

* TEMPERATURES: Up to 100 degrees.

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: 2026-08-01 @ 2:28 pm -> 2026-08-02 @ 8:00 am
Onset: 2026-08-02 @ 2:00 pm -> 2026-08-02 @ 10:00 pm
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Riverton WY on 2026-08-01 @ 2:28 pm
Headline: Red Flag Warning issued August 1 at 1:28PM MDT until August 2 at 9:00PM MDT by NWS Riverton WY
Description: The National Weather Service in Riverton has issued a Red Flag
Warning, which is in effect from 1 PM to 9 PM MDT Sunday. the Fire
Weather Watch is no longer in effect.

* IMPACTS: Low Humidities...Hot Temperatures...and Strong Gusty
Winds 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: West 10 to 20 mph with gusts to 30 mph.

* HUMIDITY: 5 to 10 percent.

* TEMPERATURES: Highs in the upper 90s to low 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: 2026-08-01 @ 2:28 pm -> 2026-08-02 @ 8:00 am
Onset: 2026-08-02 @ 2:00 pm -> 2026-08-03 @ 10:00 pm
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Riverton WY on 2026-08-01 @ 2:28 pm
Headline: Red Flag Warning issued August 1 at 1:28PM MDT until August 3 at 9:00PM MDT by NWS Riverton WY
Description: The National Weather Service in Riverton has issued a Red Flag
Warning, which is in effect from 1 PM Sunday to 9 PM MDT Monday.
the Fire Weather Watch is no longer in effect.

* IMPACTS: Low Humidities...Hot Temperatures...and Strong Gusty
Winds 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: Northwest 10 to 20 mph with gusts to 35 mph.

* HUMIDITY: 5 to 10 percent.

* TEMPERATURES: Highs in the upper 80s and low 90s. Lows in the
upper 50s to low 60s.

Alert: Extreme Heat Warning
Area(s): Musselshell; Treasure; Northern Rosebud; Custer; Fallon; Northern Stillwater; Powder River; Carter; Northern Park; Golden Valley; Red Lodge Foothills; Northern Big Horn; Southern Rosebud; Judith Gap; Paradise Valley; Livingston Area; Beartooth Foothills; Southern Big Horn; Southeastern Carbon; Northern Sweet Grass; Bighorn Canyon; Northern Carbon; Melville Foothills; Northeastern Yellowstone; Southern Wheatland; Southwestern Yellowstone; Sheridan Foothills
Effective: 2026-08-01 @ 2:09 pm -> 2026-08-02 @ 1:00 am
Onset: 2026-08-01 @ 2:09 pm -> 2026-08-02 @ 1:00 am
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Billings MT on 2026-08-01 @ 2:09 pm
Headline: Extreme Heat Warning issued August 1 at 1:09PM MDT until August 2 at 12:00AM MDT by NWS Billings MT
Description: * WHAT...Dangerously hot conditions with high temperatures of 98 to
108.

* WHERE...Portions of central, south central, and southeast Montana
and north central Wyoming.

* WHEN...Until midnight MDT tonight.

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

* ADDITIONAL DETAILS...Low temperatures in the 60s and 70s tonight
followed by high temperatures in the 90s Sunday may cause lingering
heat stress, especially for those without relief from the heat.
Much cooler temperatures arrive by Monday.

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: 2026-08-01 @ 1:46 pm -> 2026-08-02 @ 8:15 am
Onset: 2026-08-01 @ 1:46 pm -> 2026-08-02 @ 11:00 pm
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Riverton WY on 2026-08-01 @ 1:46 pm
Headline: Heat Advisory issued August 1 at 12:46PM MDT until August 2 at 10:00PM MDT by NWS Riverton WY
Description: * WHAT...Hot temperatures expected this weekend. Highs from 98 to 105
below 5500 feet, 90 to 98 above 5500 feet.

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

* WHEN...Until 10 PM MDT Sunday.

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

* ADDITIONAL DETAILS...Some locations will not see temperatures fall
below 90 degrees until sunset.

Alert: Heat Advisory
Area(s): Ferris/Seminoe/Shirley Mountains; Central Carbon County; Southwest Carbon County
Effective: 2026-08-01 @ 1:05 pm -> 2026-08-02 @ 7:00 am
Onset: 2026-08-02 @ 12:00 pm -> 2026-08-02 @ 10:00 pm
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Cheyenne WY on 2026-08-01 @ 1:05 pm
Headline: Heat Advisory issued August 1 at 12:05PM 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...From 11 AM to 9 PM MDT Sunday.

* 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: 2026-08-01 @ 1:05 pm -> 2026-08-02 @ 7:00 am
Onset: 2026-08-02 @ 12:00 pm -> 2026-08-02 @ 10:00 pm
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Cheyenne WY on 2026-08-01 @ 1:05 pm
Headline: Heat Advisory issued August 1 at 12:05PM 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...From 11 AM to 9 PM MDT Sunday.

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

Alert: Heat Advisory
Area(s): Kimball; Cheyenne; Central Laramie County; East Laramie County
Effective: 2026-08-01 @ 1:05 pm -> 2026-08-02 @ 7:00 am
Onset: 2026-08-02 @ 12:00 pm -> 2026-08-02 @ 10:00 pm
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Cheyenne WY on 2026-08-01 @ 1:05 pm
Headline: Heat Advisory issued August 1 at 12:05PM 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...From 11 AM to 9 PM MDT Sunday.

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

Alert: Red Flag Warning
Area(s): Ferris/Seminoe/Shirley Mountains; Central and West Carbon; Southwest Carbon County
Effective: 2026-08-01 @ 1:04 pm -> 2026-08-02 @ 7:15 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 2026-08-01 @ 1:04 pm
Headline: Red Flag Warning issued August 1 at 12:04PM 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 noon Sunday to 9 PM MDT Monday.

* 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; 10 to 15 percent Monday.

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