Cheyenne, Wyoming
Regional Weather Alerts
| 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 @ 2:39 am -> 2026-08-01 @ 7:00 pm |
| Onset: | 2026-08-01 @ 1:00 pm -> 2026-08-02 @ 11:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Riverton WY on 2026-08-01 @ 2:39 am |
| Headline: | Heat Advisory issued August 1 at 1:39AM MDT until August 2 at 10:00PM MDT by NWS Riverton WY |
| Description: |
* WHAT...Very 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...From noon today to 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: | Fire Weather Watch |
| 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 @ 2:36 am -> 2026-08-01 @ 7:00 pm |
| Onset: | 2026-08-02 @ 2:00 pm -> 2026-08-02 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Riverton WY on 2026-08-01 @ 2:36 am |
| Headline: | Fire Weather Watch issued August 1 at 1:36AM MDT until August 2 at 9:00PM MDT by NWS Riverton WY |
| Description: |
* IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Wind Shift with a Cold Front 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 15 to 25 mph with gusts up to 35 mph. * HUMIDITY: As low as 5 percent. * TEMPERATURES: Highs in the upper 90s to low 100s. |
| Alert: | Fire Weather Watch |
| 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 @ 2:36 am -> 2026-08-01 @ 7:00 pm |
| Onset: | 2026-08-02 @ 2:00 pm -> 2026-08-03 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Riverton WY on 2026-08-01 @ 2:36 am |
| Headline: | Fire Weather Watch issued August 1 at 1:36AM MDT until August 3 at 9:00PM MDT by NWS Riverton WY |
| Description: |
* IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Wind Shift with a Cold Front 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: West 15 to 25 mph with gusts up to 35 mph. * HUMIDITY: As low as 6 percent Sunday and 8 percent Monday. Poor humidity recovery Sunday night to around 20 to 35 percent. * TEMPERATURES: Highs in the mid-to-upper 90s Sunday and around 90 Monday. |
| 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 @ 2:25 am -> 2026-08-02 @ 1:00 am |
| Onset: | 2026-08-01 @ 1:00 pm -> 2026-08-02 @ 1:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2026-08-01 @ 2:25 am |
| Headline: | Extreme Heat Warning issued August 1 at 1:25AM MDT until August 2 at 12:00AM MDT by NWS Billings MT |
| Description: |
* WHAT...Dangerously hot conditions with high temperatures of 100 to 108 expected. * WHERE...Portions of central, south central, and southeast Montana and north central Wyoming. * WHEN...From noon today to midnight MDT tonight. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...Low temperatures are expected to be in the 70s for some locations east of Billings tonight bringing limited overnight relief. Sunday will be a little cooler but still hot with high temperatures in the mid 90s. |
| 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 @ 1:56 am -> 2026-08-02 @ 2:00 am |
| 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 @ 1:56 am |
| Headline: | Red Flag Warning issued August 1 at 12:56AM MDT until August 2 at 9:00PM MDT by NWS Billings MT |
| Description: |
* IMPACTS: Low humidities, hot temperatures, strong gusty winds, and 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 Saturday night shifting winds to the northwest and increasing wind speeds. * WIND: Northwest 10 to 20 mph with gusts up to 35 mph behind the front. * HUMIDITY: As low as 12 percent. * TEMPERATURES: Up to 98 degrees. |
| 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 @ 1:07 am -> 2026-08-01 @ 7:00 pm |
| 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 @ 1:07 am |
| Headline: | Heat Advisory issued August 1 at 12:07AM 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 @ 1:07 am -> 2026-08-01 @ 7:00 pm |
| 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 @ 1:07 am |
| Headline: | Heat Advisory issued August 1 at 12:07AM 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: | Heat Advisory |
| Area(s): | Ferris/Seminoe/Shirley Mountains; Central Carbon County; Southwest Carbon County |
| Effective: | 2026-08-01 @ 1:07 am -> 2026-08-01 @ 7:00 pm |
| 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 @ 1:07 am |
| Headline: | Heat Advisory issued August 1 at 12:07AM 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. |