Yellowstone National Park, Wyoming
Regional Weather Alerts
| Alert: | Flash Flood Watch |
| Area(s): | Big Belt, Bridger and Castle Mountains |
| Effective: | 2026-07-15 @ 12:51 pm -> 2026-07-17 @ 1:00 am |
| Onset: | 2026-07-16 @ 3:00 pm -> 2026-07-17 @ 1:00 am |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Great Falls MT on 2026-07-15 @ 12:51 pm |
| Headline: | Flash Flood Watch issued July 15 at 11:51AM MDT until July 17 at 12:00AM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Flash flooding and debris flows caused by excessive rainfall are possible over the Horse Gulch Burn Scar. * WHERE...A portion of central Montana, including the following area, Big Belt, Bridger and Castle Mountains. * WHEN...From Thursday afternoon through Thursday evening. * IMPACTS...Heavy rainfall over the Horse Gulch Burn Scar is expected up to and during the period of the watch. Rainfall rates of 0.25 to 0.75 of an inch per hour are possible with thunderstorms. Residents near the Horse Gulch Burn Scar should prepare for potential debris flow. Be sure to stay up to date with information from local authorities. Heavy rainfall could trigger flash flooding of low-lying areas, urbanized street flooding, and debris flows in and near recent wildfire burn scars. * ADDITIONAL DETAILS... - National Weather Service Meteorologists are forecasting heavy rainfall over the burn scar, which may lead to flash flooding and debris flows. - Some locations that may experience flash flooding include... Maudlow, Trident and York. - http://www.weather.gov/safety/flood |
| Alert: | Extreme Heat Warning |
| Area(s): | Richland; Dawson; Prairie; Wibaux |
| Effective: | 2026-07-15 @ 12:40 pm -> 2026-07-16 @ 3:00 am |
| Onset: | 2026-07-15 @ 12:40 pm -> 2026-07-16 @ 3:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2026-07-15 @ 12:40 pm |
| Headline: | Extreme Heat Warning issued July 15 at 11:40AM MDT until July 16 at 2:00AM MDT by NWS Glasgow MT |
| Description: |
* WHAT...Dangerously hot conditions with high temperatures in the upper 90s to around 100 degrees. * WHERE...Dawson, Prairie, Richland, and Wibaux Counties. * WHEN...Until 2 AM MDT Thursday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. |
| Alert: | Flood Watch |
| Area(s): | Musselshell; Northern Stillwater; Golden Valley; Red Lodge Foothills; Northern Big Horn; Paradise Valley; Livingston Area; Beartooth Foothills; Absaroka/Beartooth Mountains; Southern Big Horn; Southeastern Carbon; Northern Sweet Grass; Bighorn Canyon; Northern Carbon; Pryor/Northern Bighorn Mountains; Melville Foothills; Northeastern Yellowstone; Southwestern Yellowstone; Northeast Bighorn Mountains; Sheridan Foothills |
| Effective: | 2026-07-15 @ 6:45 am -> 2026-07-16 @ 4:00 am |
| Onset: | 2026-07-15 @ 1:00 pm -> 2026-07-16 @ 4:00 am |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Billings MT on 2026-07-15 @ 6:45 am |
| Headline: | Flood Watch issued July 15 at 5:45AM MDT until July 16 at 3:00AM MDT by NWS Billings MT |
| Description: |
Scattered thunderstorms capable of producing very heavy rainfall are expected this afternoon and evening. * WHAT...Flash flooding caused by excessive rainfall from thunderstorms is possible. The risk of flash flooding includes recent burn scars such as the Robertson Draw and East Side Fires south of Red Lodge, and the Elk Fire along the eastern slopes of the Bighorn Mountains. * WHERE...Portions of Montana, including the following areas, Absaroka/Beartooth Mountains, Beartooth Foothills, Bighorn Canyon, Golden Valley, Livingston Area, Melville Foothills, Musselshell, Northeastern Yellowstone, Northern Big Horn, Northern Carbon, Northern Stillwater, Northern Sweet Grass, Paradise Valley, Pryor/Northern Bighorn Mountains, Red Lodge Foothills, Southeastern Carbon, Southern Big Horn and Southwestern Yellowstone and north central Wyoming, including the following areas, Northeast Bighorn Mountains and Sheridan Foothills. * WHEN...From noon MDT today through late tonight. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas. * ADDITIONAL DETAILS... - Expect slow-moving thunderstorms capable of producing very high rainfall rates. - http://www.weather.gov/safety/flood |
| Alert: | Extreme Heat Warning |
| Area(s): | Custer; Fallon; Powder River; Carter |
| Effective: | 2026-07-15 @ 12:01 am -> 2026-07-16 @ 12:15 am |
| Onset: | 2026-07-15 @ 12:01 am -> 2026-07-16 @ 1:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2026-07-15 @ 12:01 am |
| Headline: | Extreme Heat Warning issued July 14 at 11:01PM MDT until July 16 at 12:00AM MDT by NWS Billings MT |
| Description: |
* WHAT...Very hot conditions with high temperatures of 98 to 103 degrees on Wednesday. * WHERE...Carter, Custer, Fallon, and Powder River. * WHEN...Until midnight MDT Wednesday Night. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...Very warm nighttime temperatures will provide only limited relief. |