Yellowstone National Park, Wyoming
Regional Weather Alerts
| Alert: | Special Weather Statement |
| Area(s): | Hill County; Northern Blaine County; Fergus County below 4500ft |
| Effective: | 2026-07-16 @ 8:05 am -> 2026-07-16 @ 11:15 am |
| Onset: | 2026-07-16 @ 8:05 am |
| Severity: | Moderate |
| Certainty: | Observed |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-07-16 @ 8:05 am |
| Headline: | Special Weather Statement issued July 16 at 7:05AM MDT by NWS Great Falls MT |
| Description: |
Patchy dense fog has developed across the Milk River Valley and Missouri River Valley in Fergus County early this morning. Patchy dense fog dropping visibility down as low as a half mile will be possible through the mid to late morning hours. Be prepared for rapidly changing driving conditions this morning. |
| 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 |