Yellowstone National Park, Wyoming
Regional Weather Alerts
| Alert: | Extreme Heat Watch |
| 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: | 2026-07-09 @ 6:35 am -> 2026-07-09 @ 5:00 pm |
| Onset: | 2026-07-11 @ 7:00 am -> 2026-07-13 @ 7:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Future |
| Issued By: | NWS Glasgow MT on 2026-07-09 @ 6:35 am |
| Headline: | Extreme Heat Watch issued July 9 at 5:35AM MDT until July 13 at 6:00AM MDT by NWS Glasgow MT |
| Description: |
* WHAT...Dangerously hot and humid conditions with highs on Saturday between 93 and 103 and highs on Sunday between 95 and 107. * WHERE...All of northeast Montana. * WHEN...From Saturday morning through late Sunday night. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. |
| Alert: | Extreme Heat Watch |
| Area(s): | Northern Blaine County; Fergus County below 4500ft; Canyon Ferry Area; Missouri Headwaters; Madison River Valley; Gallatin Valley |
| Effective: | 2026-07-09 @ 4:23 am -> 2026-07-09 @ 7:30 pm |
| Onset: | 2026-07-12 @ 1:00 pm -> 2026-07-12 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Future |
| Issued By: | NWS Great Falls MT on 2026-07-09 @ 4:23 am |
| Headline: | Extreme Heat Watch issued July 9 at 3:23AM MDT until July 12 at 9:00PM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Dangerously hot conditions with heat index values near 100 degrees possible. * WHERE...Canyon Ferry Area, Fergus County below 4500ft, Northern Blaine County, Gallatin Valley, Madison River Valley, and Missouri Headwaters. * WHEN...From Sunday afternoon through Sunday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. |
| Alert: | Extreme Heat Watch |
| 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: | 2026-07-09 @ 2:18 am -> 2026-07-10 @ 2:30 am |
| Onset: | 2026-07-11 @ 7:00 am -> 2026-07-13 @ 7:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Future |
| Issued By: | NWS Billings MT on 2026-07-09 @ 2:18 am |
| Headline: | Extreme Heat Watch issued July 9 at 1:18AM MDT until July 13 at 6:00AM MDT by NWS Billings MT |
| Description: |
* WHAT...Dangerously hot conditions with all time record high temperatures possible. * WHERE...Portions of central, south central, and southeast Montana and north central Wyoming. * WHEN...From Saturday morning through late Sunday night. Hottest temperatures are expected Sunday afternoon. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...Morning low temperatures may only fall into the 70s. This would result in little to no time for the body and infrastructure to cool off and recover, therefore increasing the risk of impacts. |