Yellowstone National Park, Wyoming
Regional Weather Alerts
| Alert: | Special Weather Statement |
| Area(s): | Northern Rosebud |
| Effective: | 2026-08-13 @ 6:47 pm -> 2026-08-13 @ 7:30 pm |
| Onset: | 2026-08-13 @ 6:47 pm |
| Severity: | Moderate |
| Certainty: | Observed |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2026-08-13 @ 6:47 pm |
| Headline: | Special Weather Statement issued August 13 at 5:47PM MDT by NWS Billings MT |
| Description: |
At 547 PM MDT, Doppler radar was tracking a strong thunderstorm 14 miles east of Colstrip, moving north at 15 mph. HAZARD...Wind gusts up to 40 mph and pea size hail. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Minor damage to outdoor objects is possible. Locations impacted include... Mainly rural areas of Central Rosebud County. |
| Alert: | Special Weather Statement |
| Area(s): | Missoula/Bitterroot Valleys |
| Effective: | 2026-08-13 @ 6:33 pm -> 2026-08-13 @ 7:30 pm |
| Onset: | 2026-08-13 @ 6:33 pm |
| Severity: | Moderate |
| Certainty: | Observed |
| Urgency: | Expected |
| Issued By: | NWS Missoula MT on 2026-08-13 @ 6:33 pm |
| Headline: | Special Weather Statement issued August 13 at 5:33PM MDT by NWS Missoula MT |
| Description: |
At 533 PM MDT, Doppler radar was tracking a strong thunderstorm 6 miles north of Victor, or 18 miles north of Hamilton, moving northeast at 15 mph. HAZARD...Wind gusts up to 40 mph and pea size hail. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Minor damage to outdoor objects is possible. Heavy rainfall could cause excess runoff and debris flows in areas of burn scars or flood prone terrain. Locations impacted include... Stevensville. |
| 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 |