Cheyenne, Wyoming

Regional Weather Alerts


     

Alert: Extreme Heat Warning
Area(s): Musselshell; Treasure; Northern Rosebud; Custer; Fallon; Northern Stillwater; Powder River; Carter; Golden Valley; Northern Big Horn; Southern Rosebud; Southern Big Horn; Southeastern Carbon; Bighorn Canyon; Northern Carbon; Northeastern Yellowstone; Southwestern Yellowstone; Sheridan Foothills
Effective: 2026-07-23 @ 10:44 pm -> 2026-07-24 @ 10:45 pm
Onset: 2026-07-24 @ 10:00 am -> 2026-07-26 @ 10:00 pm
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Billings MT on 2026-07-23 @ 10:44 pm
Headline: Extreme Heat Warning issued July 23 at 9:44PM MDT until July 26 at 9:00PM MDT by NWS Billings MT
Description: * WHAT...Dangerously hot conditions with high temperatures of 98 to
108, hottest over eastern Montana. Saturday is expected to be the
hottest day.

* WHERE...Portions of central, south central, and southeast Montana
and north central Wyoming.

* WHEN...From 9 AM Friday to 9 PM MDT Sunday.

* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.

* ADDITIONAL DETAILS...Dangerously 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: Fire Weather Watch
Area(s): Gallatin National Forest; 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; Bighorn National Forest
Effective: 2026-07-23 @ 2:13 pm -> 2026-07-24 @ 2:15 pm
Onset: 2026-07-25 @ 1:00 pm -> 2026-07-26 @ 1:00 am
Severity: Severe
Certainty: Possible
Urgency: Future
Issued By: NWS Billings MT on 2026-07-23 @ 2:13 pm
Headline: Fire Weather Watch issued July 23 at 1:13PM MDT until July 26 at 12:00AM MDT by NWS Billings MT
Description: The National Weather Service in Billings has issued a Fire Weather
Watch...which is in effect from Saturday afternoon through
Saturday evening.

* IMPACTS: Low humidities, hot temperatures, and high-based
thunderstorms with gusty and erratic outflow winds may create
erratic fire behavior and new fire starts.

* AFFECTED AREA:
In North Central WY Fire Zones...274...284.
In South Central MT Fire Zones...123...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...Big Horn...Johnson...Sheridan...Washakie.
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.
In Southwest MT...Gallatin.

* WIND: Southwest 10 to 20 mph with gusts to 25 mph.

* THUNDERSTORMS: Scattered afternoon and evening thunderstorms will
produce gusty and erratic winds, and spotty rainfall.

* HUMIDITY: Minimums of 12 to 19 percent.

* TEMPERATURES: Highs of 99 to 107 below 5000 feet, hottest in the
east.