Yellowstone National Park, Wyoming
Regional Weather Alerts
| Alert: | Fire Weather Watch |
| Area(s): | Deerlodge/Western Beaverhead National Forest; Eastern Beaverhead National Forest |
| Effective: | 2026-07-10 @ 11:34 am -> 2026-07-10 @ 7:45 pm |
| Onset: | 2026-07-12 @ 1:00 pm -> 2026-07-12 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Missoula MT on 2026-07-10 @ 11:34 am |
| Headline: | Fire Weather Watch issued July 10 at 10:34AM MDT until July 12 at 9:00PM MDT by NWS Missoula MT |
| Description: |
...FIRE WEATHER WATCH IN EFFECT FROM SUNDAY AFTERNOON THROUGH SUNDAY EVENING DUE TO WIND AND LOW RELATIVE HUMIDITY FOR DEERLODGE/WEST BEAVERHEAD AND EAST BEAVERHEAD... The National Weather Service in Missoula MT has issued a Fire Weather Watch. * AFFECTED AREA...Fire Weather Zones 110 and 111. * TIMING...From Sunday afternoon through Sunday evening. * WINDS...Southwest winds 15 to 25 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...Relative Humidity between 8 to 15 percent in the lower elevations of Zone 111 (East Beaverhead); 10 to 15 percent for Zone 110 (Deerlodge/West Beaverhead) * IMPACTS...Any fires that develop will spread rapidly. Outdoor burning is not recommended. |
| 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 @ 11:27 am -> 2026-07-11 @ 11:30 am |
| 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 @ 11:27 am |
| Headline: | Fire Weather Watch issued July 10 at 10:27AM MDT until July 12 at 9:00PM MDT by NWS Billings MT |
| Description: |
The National Weather Service in Billings has issued a Fire Weather Watch...which is in effect from Sunday morning through Sunday evening. * IMPACTS: Low humidities, very hot temperatures, and strong gusty winds will create erratic fire behavior and new fire starts. * 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: | Heat Advisory |
| Area(s): | Eastern Toole and Liberty; Hill County; Northern Blaine County; Southern High Plains; Eastern Pondera and Eastern Teton; Western and Central Chouteau County; Bears Paw Mountains and Southern Blaine; Cascade County below 5000ft; Judith Basin County and Judith Gap; Fergus County below 4500ft; Gates of the Mountains; Helena Valley; Canyon Ferry Area; Missouri Headwaters; Madison River Valley; Gallatin Valley |
| Effective: | 2026-07-10 @ 4:11 am -> 2026-07-10 @ 6:00 pm |
| Onset: | 2026-07-11 @ 1:00 pm -> 2026-07-13 @ 10:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-07-10 @ 4:11 am |
| Headline: | Heat Advisory issued July 10 at 3:11AM MDT until July 13 at 9:00PM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Hot daytime temperatures of 95 to 105 degrees, with overnight temperatures of 60 to 70 degrees expected. * WHERE...Portions of central, north central, and southwest Montana. * WHEN...From noon Saturday to 9 PM MDT Monday. * IMPACTS...Hot temperatures 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. |
| Alert: | Extreme Heat Warning |
| Area(s): | Central and Southeast Phillips; Central and Southern Valley; Daniels; Sheridan; Western Roosevelt; Petroleum; Garfield; McCone; Richland; Dawson; Prairie; Wibaux; Northern Phillips; Southwest Phillips; Northern Valley; Eastern Roosevelt |
| Effective: | 2026-07-10 @ 1:30 am -> 2026-07-10 @ 5:00 pm |
| Onset: | 2026-07-11 @ 7:00 am -> 2026-07-13 @ 7:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2026-07-10 @ 1:30 am |
| Headline: | Extreme Heat Warning issued July 10 at 12:30AM MDT until July 13 at 6:00AM MDT by NWS Glasgow MT |
| Description: |
* WHAT...Dangerously hot conditions with highs between 93 and 103 on Saturday and highs between 97 and 110 on Sunday expected. * WHERE...All of northeast Montana. * WHEN...From 6 AM Saturday to 6 AM MDT Monday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. |