Yellowstone National Park, Wyoming
Regional Weather Alerts
| Alert: | Flash Flood Watch |
| Area(s): | Northwest Beaverhead County |
| Effective: | 2026-08-13 @ 11:50 am -> 2026-08-14 @ 1:00 am |
| Onset: | 2026-08-13 @ 2:00 pm -> 2026-08-14 @ 1:00 am |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Great Falls MT on 2026-08-13 @ 11:50 am |
| Headline: | Flash Flood Watch issued August 13 at 10:50AM MDT until August 14 at 12:00AM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Flash flooding and debris flows caused by excessive rainfall continue to be possible over the Bobcat Lakes and Sand Creek burn scars in the Pioneer Mountains. * WHERE...The Pioneer Mountain Range. * WHEN...Through this evening. * IMPACTS...Heavy rainfall over the Bobcat Lakes and Sand Creek burn scars is expected up to and during the period of the watch. Residents near the Bobcat Lakes and Sand Creek burn scars should prepare for the potential of debris flows moving through the Pioneer Mountain Range. Be sure to stay up to date with information from local authorities. Heavy rainfall could trigger flash flooding of low-lying areas, 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. Additional flood statements might be needed for Friday. - For flood safety, go to this web page. http://www.weather.gov/safety/flood |
| Alert: | Flash Flood Watch |
| Area(s): | Big Belt, Bridger and Castle Mountains |
| Effective: | 2026-08-13 @ 11:50 am -> 2026-08-14 @ 1:00 am |
| Onset: | 2026-08-13 @ 7:00 pm -> 2026-08-14 @ 1:00 am |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Great Falls MT on 2026-08-13 @ 11:50 am |
| Headline: | Flash Flood Watch issued August 13 at 10:50AM MDT until August 14 at 12:00AM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Flash flooding and debris flows caused by excessive rainfall continue to be possible over the Horse Gulch burn scar and the Riverside Campground. * WHERE...A portion of central Montana, including the following areas, Horse Gulch burn scar, including Riverside Campground. * WHEN...From 6 PM MDT this evening through this evening. * IMPACTS...Heavy rainfall over the Horse Gulch burn scar is expected up to and during the period of the watch. Residents near the Horse Gulch burn scar and Riverside Campground 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 and debris flows in and near recent wildfire burn scars. * ADDITIONAL DETAILS... - National Weather Service Meteorologists are forecasting heavy rainfall over the Horse Gulch burn scar, which may lead to flash flooding and debris flows. Additional heavy rainfall is possible on Friday, and additional flood statements may be needed over the coming days. - For flood safety, go to this web page. http://www.weather.gov/safety/flood |
| Alert: | Flood Watch |
| Area(s): | Elkhorn and Boulder Mountains |
| Effective: | 2026-08-13 @ 11:50 am -> 2026-08-14 @ 1:00 am |
| Onset: | 2026-08-13 @ 3:00 pm -> 2026-08-14 @ 1:00 am |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Great Falls MT on 2026-08-13 @ 11:50 am |
| Headline: | Flood Watch issued August 13 at 10:50AM MDT until August 14 at 12:00AM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Flash flooding caused by excessive rainfall is possible. * WHERE...A portion of central Montana, including the following area, Elkhorn and Boulder Mountains. * WHEN...From 2 PM MDT this afternoon through this evening. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and flood-prone locations such as poor drainage areas, urban areas, and burn scars. * ADDITIONAL DETAILS... - National Weather Service Meteorologists are forecasting heavy rainfall, which may lead to flash flooding and debris flows on recent burn scars. - For flood safety, go to this web page. http://www.weather.gov/safety/flood |
| Alert: | Flood Watch |
| Area(s): | Butte/Blackfoot Region |
| Effective: | 2026-08-13 @ 11:15 am -> 2026-08-14 @ 1:00 am |
| Onset: | 2026-08-13 @ 3:00 pm -> 2026-08-14 @ 1:00 am |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Missoula MT on 2026-08-13 @ 11:15 am |
| Headline: | Flood Watch issued August 13 at 10:15AM MDT until August 14 at 12:00AM MDT by NWS Missoula MT |
| Description: |
* WHAT...Flash flooding caused by excessive rainfall is possible. * WHERE...A portion of west central Montana, including the following area, Butte/Blackfoot Region. * WHEN...From 2 PM MDT this afternoon through this evening. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and flood-prone locations such as poor drainage areas, urban areas, and burn scars. * ADDITIONAL DETAILS... - Scattered thunderstorms with rain rates over a half inch per hour are expected this afternoon and evening. If thunderstorms with these rain rates hit susceptible areas such as burn scars and some urban areas, then the flooding potential is high. - https://www.weather.gov/mso/hydrology |