Yellowstone National Park, Wyoming
Regional Weather Alerts
| Alert: | Extreme Heat Warning |
| Area(s): | Daniels; Sheridan |
| Effective: | 2026-07-26 @ 1:38 am -> 2026-07-26 @ 4:00 pm |
| Onset: | 2026-07-26 @ 1:38 am -> 2026-07-26 @ 11:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2026-07-26 @ 1:38 am |
| Headline: | Extreme Heat Warning issued July 26 at 12:38AM MDT until July 26 at 10:00PM MDT by NWS Glasgow MT |
| Description: |
* WHAT...Dangerously hot conditions with heat index values near 100 with little to no overnight recovery. * WHERE...Daniels and Sheridan Counties. * WHEN...Until 10 PM MDT this evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. |
| Alert: | Extreme Heat Warning |
| Area(s): | Northern Phillips; Northern Valley |
| Effective: | 2026-07-26 @ 1:38 am -> 2026-07-26 @ 4:00 pm |
| Onset: | 2026-07-26 @ 1:38 am -> 2026-07-26 @ 11:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2026-07-26 @ 1:38 am |
| Headline: | Extreme Heat Warning issued July 26 at 12:38AM MDT until July 26 at 10:00PM MDT by NWS Glasgow MT |
| Description: |
* WHAT...Dangerously hot conditions with temperatures near 100 with little to no overnight recovery * WHERE...Northern Phillips and Northern Valley Counties. * WHEN...Until 10 PM MDT this evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. |
| Alert: | Extreme Heat Warning |
| Area(s): | Central and Southeast Phillips; Central and Southern Valley; Western Roosevelt; Petroleum; Garfield; McCone; Richland; Dawson; Prairie; Wibaux; Southwest Phillips; Eastern Roosevelt |
| Effective: | 2026-07-26 @ 1:38 am -> 2026-07-26 @ 4:00 pm |
| Onset: | 2026-07-26 @ 1:38 am -> 2026-07-26 @ 11:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2026-07-26 @ 1:38 am |
| Headline: | Extreme Heat Warning issued July 26 at 12:38AM MDT until July 26 at 10:00PM MDT by NWS Glasgow MT |
| Description: |
* WHAT...Dangerously hot conditions with temperatures up to near 100 degrees with little to no overnight recovery. * WHERE...A portion of northeast Montana. * WHEN...Until 10 PM MDT this evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. |
| Alert: | Heat Advisory |
| Area(s): | Judith Gap; Northern Sweet Grass; Melville Foothills; Southern Wheatland |
| Effective: | 2026-07-25 @ 11:45 pm -> 2026-07-26 @ 10:00 pm |
| Onset: | 2026-07-25 @ 11:45 pm -> 2026-07-26 @ 10:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2026-07-25 @ 11:45 pm |
| Headline: | Heat Advisory issued July 25 at 10:45PM MDT until July 26 at 9:00PM MDT by NWS Billings MT |
| Description: |
* WHAT...Hot conditions with high temperatures of 90 to 100 degrees expected. * WHERE...Judith Gap, Southern Wheatland, Melville Foothills, and Northern Sweet Grass. * WHEN...Until 9 PM MDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...Hot daytime temperatures combined with warm overnight low temperatures will produce cumulative heat stress. This heat stress will become dangerous to anyone without adequate cooling and hydration. |
| Alert: | Extreme Heat Warning |
| Area(s): | Northern Rosebud; Custer; Fallon; Powder River; Carter; Southern Rosebud |
| Effective: | 2026-07-25 @ 11:45 pm -> 2026-07-26 @ 11:45 pm |
| Onset: | 2026-07-25 @ 11:45 pm -> 2026-07-27 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2026-07-25 @ 11:45 pm |
| Headline: | Extreme Heat Warning issued July 25 at 10:45PM MDT until July 27 at 9:00PM MDT by NWS Billings MT |
| Description: |
* WHAT...Dangerously hot conditions with temperatures up to 102 degrees expected. * WHERE...A portion of southeast Montana. * WHEN...Until 9 PM MDT Monday. * 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: | Heat Advisory |
| Area(s): | Musselshell; Treasure; Northern Stillwater; Golden Valley; Red Lodge Foothills; Northern Big Horn; Beartooth Foothills; Southern Big Horn; Southeastern Carbon; Bighorn Canyon; Northern Carbon; Northeastern Yellowstone; Southwestern Yellowstone; Sheridan Foothills |
| Effective: | 2026-07-25 @ 11:45 pm -> 2026-07-26 @ 10:00 pm |
| Onset: | 2026-07-25 @ 11:45 pm -> 2026-07-26 @ 10:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2026-07-25 @ 11:45 pm |
| Headline: | Heat Advisory issued July 25 at 10:45PM MDT until July 26 at 9:00PM MDT by NWS Billings MT |
| Description: |
* WHAT...Temperatures of 95 to 100 degrees expected. * WHERE...Portions of central and south central Montana and north central Wyoming. * WHEN...Until 9 PM MDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...Hot daytime temperatures combined with warm overnight low temperatures will produce cumulative heat stress. This heat stress will become dangerous to anyone without adequate cooling and hydration. |
| Alert: | Heat Advisory |
| Area(s): | Eastern Glacier, Western Toole, and Central Pondera; Eastern Toole and Liberty; Eastern Pondera and Eastern Teton; Gates of the Mountains; Helena Valley; Meagher County Valleys; Canyon Ferry Area; Missouri Headwaters; Madison River Valley; Gallatin Valley; Beaverhead and Western Madison below 6000ft |
| Effective: | 2026-07-25 @ 11:40 pm -> 2026-07-26 @ 2:45 pm |
| Onset: | 2026-07-25 @ 11:40 pm -> 2026-07-26 @ 10:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-07-25 @ 11:40 pm |
| Headline: | Heat Advisory issued July 25 at 10:40PM MDT until July 26 at 9:00PM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Hot Conditions. High temperatures of between 90 and 95 degrees. * WHERE...Portions of central, north central, and southwest Montana. * WHEN...Until 9 PM MDT Sunday. * IMPACTS...Hot temperatures may cause heat illnesses. |
| Alert: | Heat Advisory |
| Area(s): | Hill County; Northern Blaine County; Western and Central Chouteau County; Cascade County below 5000ft; Judith Basin County and Judith Gap |
| Effective: | 2026-07-25 @ 11:40 pm -> 2026-07-26 @ 2:45 pm |
| Onset: | 2026-07-25 @ 11:40 pm -> 2026-07-26 @ 10:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-07-25 @ 11:40 pm |
| Headline: | Heat Advisory issued July 25 at 10:40PM MDT until July 26 at 9:00PM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Hot Conditions. High temperatures of between 95 and 100 degrees. * WHERE...Cascade County below 5000ft, Hill County, Judith Basin County and Judith Gap, Northern Blaine County, and Western and Central Chouteau County. * WHEN...Until 9 PM MDT Sunday. * IMPACTS...Hot temperatures may cause heat illnesses. |
| Alert: | Extreme Heat Warning |
| Area(s): | Bears Paw Mountains and Southern Blaine; Fergus County below 4500ft |
| Effective: | 2026-07-25 @ 11:40 pm -> 2026-07-26 @ 2:45 pm |
| Onset: | 2026-07-25 @ 11:40 pm -> 2026-07-26 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-07-25 @ 11:40 pm |
| Headline: | Extreme Heat Warning issued July 25 at 10:40PM MDT until July 26 at 9:00PM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Dangerously hot conditions. High temperatures between 95 and 102 expected. * WHERE...Bears Paw Mountains and Southern Blaine and Fergus County below 4500ft. * WHEN...Until 9 PM MDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat. * ADDITIONAL DETAILS...The hottest temperatures will occur in the Missouri River Breaks. |