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.