Cheyenne, Wyoming
Regional Weather Alerts
| Alert: | Fire Weather Watch |
| Area(s): | 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 |
| Effective: | 2026-07-10 @ 12:09 pm -> 2026-07-11 @ 12:15 pm |
| Onset: | 2026-07-12 @ 9:00 am -> 2026-07-12 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Billings MT on 2026-07-10 @ 12:09 pm |
| Headline: | Fire Weather Watch issued July 10 at 11:09AM MDT until July 12 at 9:00PM MDT by NWS Billings MT |
| Description: |
* IMPACTS: Low humidities, very hot temperatures, strong gusty winds may create erratic fire behavior. * AFFECTED AREA: In North Central WY Fire Zone...274. In South Central MT Fire Zones...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...Sheridan. 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. * WIND: South 10 to 20 mph with gusts up to 30 mph. * HUMIDITY: As low as 7 percent. * TEMPERATURES: Up to 112. |
| Alert: | Extreme Heat Warning |
| Area(s): | Southwest Wyoming |
| Effective: | 2026-07-10 @ 11:06 am -> 2026-07-11 @ 2:15 am |
| Onset: | 2026-07-11 @ 1:00 pm -> 2026-07-13 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Salt Lake City UT on 2026-07-10 @ 11:06 am |
| Headline: | Extreme Heat Warning issued July 10 at 10:06AM MDT until July 13 at 9:00PM MDT by NWS Salt Lake City UT |
| Description: |
* WHAT...Dangerously hot conditions with temperatures up to 98 degrees expected. * WHERE...Southwest Wyoming. * WHEN...From noon Saturday to 9 PM MDT Monday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...There is high confidence that temperatures will warm to values challenging daily, monthly, or even all-time high temperature records Saturday through Monday. |
| Alert: | Extreme Heat Warning |
| 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: | 2026-07-10 @ 10:32 am -> 2026-07-11 @ 8:00 am |
| Onset: | 2026-07-11 @ 1:00 pm -> 2026-07-13 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Riverton WY on 2026-07-10 @ 10:32 am |
| Headline: | Extreme Heat Warning issued July 10 at 9:32AM MDT until July 13 at 9:00PM MDT by NWS Riverton WY |
| Description: |
* WHAT...Dangerously hot conditions with temperatures 100 to 110 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 noon Saturday to 9 PM MDT Monday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. |
| Alert: | Fire Weather Watch |
| Area(s): | North Bighorn Basin/Worland BLM; Cody Foothills; Natrona County/Casper BLM; Johnson County/Casper BLM; South Bighorn Basin/Worland BLM; Upper Wind River Basin/Wind River Basin |
| Effective: | 2026-07-10 @ 10:30 am -> 2026-07-11 @ 8:00 am |
| Onset: | 2026-07-12 @ 12:00 pm -> 2026-07-12 @ 11:00 pm |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Riverton WY on 2026-07-10 @ 10:30 am |
| Headline: | Fire Weather Watch issued July 10 at 9:30AM MDT until July 12 at 10:00PM MDT by NWS Riverton WY |
| Description: |
The National Weather Service in Riverton has issued a Fire Weather Watch, which is in effect from Sunday morning through Sunday evening. * IMPACTS: Low Humidities...Hot Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...280...283. In North Central WY Fire Zones...275...276...281...282. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Big Horn...Hot Springs...Johnson...Park Washakie. * WIND: South to Southeast 15 to 25 mph with gusts up to 35 mph. * HUMIDITY: As low as 5 percent. * TEMPERATURES: Highs between 98 and 108 degrees. |
| Alert: | Heat Advisory |
| Area(s): | Harding; Northern Perkins; Butte; Northern Meade Co Plains; Ziebach; Northern Foothills; Rapid City; Southern Foothills; 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: | 2026-07-10 @ 8:32 am -> 2026-07-11 @ 1:00 am |
| Onset: | 2026-07-11 @ 1:00 pm -> 2026-07-14 @ 9:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Rapid City SD on 2026-07-10 @ 8:32 am |
| Headline: | Heat Advisory issued July 10 at 7:32AM MDT until July 14 at 8:00PM MDT by NWS Rapid City SD |
| Description: |
* WHAT...Heat index values up to 102 expected. * WHERE...Portions of northwestern, south central, and southwestern South Dakota and northeast Wyoming. * WHEN...From noon MDT /1 PM CDT/ Saturday to 8 PM MDT /9 PM CDT/ Tuesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. |
| Alert: | Fire Weather Watch |
| Area(s): | Pine Ridge/Nebraska National Forest; Niobrara/Lower Elevations of Converse/Thunder Basin National Grassland; Middle North Platte River Basin/Niobrara and Converse High Plains; Southwest Carbon County; Laramie Foothills and High Plains; Laramie East High Plains; Bordeaux/Chugwater/Wheatland; Goshen/Middle-Lower North Platte River Basin |
| Effective: | 2026-07-10 @ 3:43 am -> 2026-07-10 @ 7:30 pm |
| Onset: | 2026-07-11 @ 1:00 pm -> 2026-07-12 @ 9:00 pm |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Cheyenne WY on 2026-07-10 @ 3:43 am |
| Headline: | Fire Weather Watch issued July 10 at 2:43AM MDT until July 12 at 8:00PM MDT by NWS Cheyenne WY |
| Description: |
Fire Weather Watch for portions of Southeast Wyoming. The National Weather Service in Cheyenne has issued a Fire Weather Watch, which is in effect from Saturday afternoon through Sunday evening. * AFFECTED AREA...Fire weather zone 434.Fire weather zone 417.Fire weather zone 418.Fire weather zone 423.Fire weather zone 430.Fire weather zone 431.Fire weather zone 432.Fire weather zone 433. * WIND... South 10 to 15 mph gusting up to 30 mph * HUMIDITY... Between 10 and 15 percent * IMPACTS...any fires that develop will likely spread rapidly. Outdoor burning is not recommended. |
| Alert: | Heat Advisory |
| Area(s): | Dawes; Box Butte; Scotts Bluff; Banner; Morrill; Kimball; Cheyenne; North Sioux; South Sioux; Converse County Lower Elevations; Niobrara County; East Platte County; Goshen County; Central Laramie County; East Laramie County |
| Effective: | 2026-07-10 @ 3:36 am -> 2026-07-10 @ 7:45 pm |
| Onset: | 2026-07-11 @ 1:00 pm -> 2026-07-13 @ 10:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Cheyenne WY on 2026-07-10 @ 3:36 am |
| Headline: | Heat Advisory issued July 10 at 2:36AM MDT until July 13 at 9:00PM MDT by NWS Cheyenne WY |
| Description: |
* WHAT...Afternoon temperatures will be near or exceed 100 degrees with overnight temperatures between 65 to 70 providing little relief overnight * WHERE...Portions of panhandle Nebraska and east central and southeast Wyoming. * WHEN...From noon Saturday to 9 PM MDT Monday. * IMPACTS...Hot temperatures and poor hydration may cause heat illnesses. |
| 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: | 2026-07-10 @ 1:49 am -> 2026-07-11 @ 2:00 am |
| Onset: | 2026-07-11 @ 7:00 am -> 2026-07-14 @ 1:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2026-07-10 @ 1:49 am |
| Headline: | Extreme Heat Warning issued July 10 at 12:49AM MDT until July 14 at 12:00AM MDT by NWS Billings MT |
| Description: |
* WHAT...Dangerously hot conditions with high temperatures of 100 to 113 expected, hottest Sunday. Some all time record highs are possible on Sunday. * WHERE...Portions of central, south central, and southeast Montana and north central Wyoming. * WHEN...From 6 AM Saturday to midnight MDT Monday Night. * 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. |