Cheyenne, Wyoming
Regional Weather Alerts
| Alert: | Extreme Heat Watch |
| 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: | 2026-07-09 @ 1:31 pm -> 2026-07-10 @ 1:45 pm |
| Onset: | 2026-07-11 @ 7:00 am -> 2026-07-14 @ 1:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Future |
| Issued By: | NWS Billings MT on 2026-07-09 @ 1:31 pm |
| Headline: | Extreme Heat Watch issued July 9 at 12:31PM MDT until July 14 at 12:00AM MDT by NWS Billings MT |
| Description: |
* WHAT...Dangerously hot conditions with temperatures of 100 to 110 possible, warmest Sunday. A few all time record high temperatures are possible. * WHERE...Portions of central, south central, and southeast Montana and north central Wyoming. * WHEN...From Saturday morning through Monday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...Extremely hot daytime temperatures combined with warm overnight low temperatures will produce cumulative heat stress. This heat stress will quickly become dangerous to anyone without adequate cooling and hydration. |
| Alert: | Extreme Heat Watch |
| 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: | 2026-07-09 @ 1:02 pm -> 2026-07-10 @ 9:15 am |
| Onset: | 2026-07-11 @ 1:00 pm -> 2026-07-13 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Future |
| Issued By: | NWS Riverton WY on 2026-07-09 @ 1:02 pm |
| Headline: | Extreme Heat Watch issued July 9 at 12:02PM MDT until July 13 at 9:00PM MDT by NWS Riverton WY |
| Description: |
* WHAT...Dangerously hot conditions with temperatures 98 to 108 degrees below 6,000 feet and 90 to 100 degrees between 6,000 and 7,500 feet each day. * WHERE...Portions of central, north central, northwest, south central, southwest, and west central Wyoming. * WHEN...From Saturday afternoon through Monday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. |
| Alert: | Extreme Heat Watch |
| Area(s): | Harding; Northern Perkins; Butte; Northern Meade Co Plains; Ziebach; Northern Foothills; Rapid City; Southern Foothills; Southern Black Hills; Custer Co Plains; Pennington Co Plains; Haakon; Western Fall River; Northern Oglala Lakota; Northern Jackson; Mellette; Sturgis/Piedmont Foothills; Southern Meade Co Plains; Hermosa Foothills; Eastern Fall River; Southern Jackson; Southern Perkins; Northern Campbell; Southern Campbell; Western Crook; Weston County Plains; Newcastle; Northeastern Crook |
| Effective: | 2026-07-09 @ 12:34 pm -> 2026-07-10 @ 3:45 am |
| Onset: | 2026-07-11 @ 1:00 pm -> 2026-07-14 @ 1:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Future |
| Issued By: | NWS Rapid City SD on 2026-07-09 @ 12:34 pm |
| Headline: | Extreme Heat Watch issued July 9 at 11:34AM MDT until July 14 at 12:00AM MDT by NWS Rapid City SD |
| Description: |
* WHAT...Dangerously hot conditions with heat index values ranging from 100 to 105 possible. * WHERE...Portions of northwestern, south central, southwestern, and the Black Hills of South Dakota and northeast Wyoming. * WHEN...From Saturday afternoon through Monday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. |
| Alert: | Heat Advisory |
| Area(s): | Southwest Wyoming |
| Effective: | 2026-07-09 @ 11:55 am -> 2026-07-10 @ 4:00 am |
| Onset: | 2026-07-12 @ 1:00 pm -> 2026-07-13 @ 10:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Salt Lake City UT on 2026-07-09 @ 11:55 am |
| Headline: | Heat Advisory issued July 9 at 10:55AM MDT until July 13 at 9:00PM MDT by NWS Salt Lake City UT |
| Description: |
* WHAT...Temperatures up to 98 expected. * WHERE...Southwest Wyoming. * WHEN...From noon Sunday to 9 PM MDT Monday. * IMPACTS...Hot temperatures may cause heat illnesses. |