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 the Fire Weather Watch is no longer in effect.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. |