Yellowstone National Park, Wyoming
Regional Weather Alerts
| Alert: | Flood Watch |
| Area(s): | East Glacier Park Region; Northern High Plains; Eastern Glacier, Western Toole, and Central Pondera; Southern Rocky Mountain Front; Southern High Plains; Eastern Pondera and Eastern Teton; Cascade County below 5000ft; Gates of the Mountains |
| Effective: | 2026-05-29 @ 2:22 pm -> 2026-05-30 @ 7:30 am |
| Onset: | 2026-05-30 @ 1:00 pm -> 2026-06-01 @ 7:00 pm |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Great Falls MT on 2026-05-29 @ 2:22 pm |
| Headline: | Flood Watch issued May 29 at 1:22PM MDT until June 1 at 6:00PM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Flooding caused by excessive rainfall and runoff from snowmelt is possible. * WHERE...Portions of central and north central Montana, including the following areas, in central Montana, Gates of the Mountains. In north central Montana, Cascade County below 5000ft, East Glacier Park Region, Eastern Glacier, Western Toole, and Central Pondera, Eastern Pondera and Eastern Teton, Northern High Plains, Southern High Plains and Southern Rocky Mountain Front. * WHEN...From Saturday afternoon through Monday afternoon. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Creeks and streams may rise out of their banks. * ADDITIONAL DETAILS... - Rainfall amounts of 1 to 3 inches with a 10% chance for 4 inches along and west of the I-15 corridor are possible. The window for the heaviest rainfall will be between Saturday afternoon through Sunday morning. Light to moderate rainfall lingers Sunday afternoon through at least Monday. The greatest impacts will be along creeks and rivers emanating from the Rocky Mountain Front, including but not limited to the Sun River, Marias River, and Saint Mary River. Rural roads may become impassable. - http://www.weather.gov/safety/flood |
| Alert: | Hydrologic Outlook |
| Area(s): | Granite, MT; Missoula, MT; Powell, MT; Ravalli, MT |
| Effective: | 2026-05-29 @ 1:23 pm -> 2026-05-30 @ 1:00 pm |
| Onset: | 2026-05-29 @ 1:23 pm |
| Severity: | Unknown |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Missoula MT on 2026-05-29 @ 1:23 pm |
| Headline: | Hydrologic Outlook issued May 29 at 12:23PM MDT by NWS Missoula MT |
| Description: |
ESFMSO What: Widespread Moderate to Heavy Precipitation Where: West-Central Montana Counties: Missoula, Ravalli, Granite and Powell. Timing: Saturday May 30 through Monday June 1, 2026 Relevant factors: Total precipitation amounts of 0.5 to 2 inches with locally higher amounts possible in higher terrain along the Divide. Ongoing snowmelt and recent precipitation has kept stream and river levels rising. Anticipate further rises in local waterways, rockfall and mudslide potential in steep terrain, as well as possible urban and low-land flooding. |
| Alert: | Flood Watch |
| Area(s): | West Glacier Region; Flathead/Mission Valleys |
| Effective: | 2026-05-29 @ 1:13 pm -> 2026-05-30 @ 1:00 pm |
| Onset: | 2026-05-30 @ 7:00 pm -> 2026-06-01 @ 1:00 pm |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Missoula MT on 2026-05-29 @ 1:13 pm |
| Headline: | Flood Watch issued May 29 at 12:13PM MDT until June 1 at 12:00PM MDT by NWS Missoula MT |
| Description: |
Heavy rain combined with mountain snowpack melt may cause flows in streams and rivers to increase quickly and reach critical levels. * WHAT...Flooding caused by rain and snowmelt is possible. * WHERE...A portion of northwest Montana, including the following areas, Flathead/Mission Valleys and West Glacier Region. This includes the following Specific Areas... Kalispell and Going-to-the-Sun Road in Glacier Park. * WHEN...From Saturday evening through Monday morning. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Rockfall and debris flows are also possible in steep terrain. * ADDITIONAL DETAILS... - Rainfall of 1 to 2 inches for valley locations with 2 to 4 inches in the terrain are possible late Saturday through Monday. - https://www.weather.gov/mso/hydrology |
| Alert: | Flood Watch |
| Area(s): | Flathead, MT |
| Effective: | 2026-05-29 @ 12:37 pm -> 2026-05-30 @ 1:00 pm |
| Onset: | 2026-05-30 @ 7:00 am -> 2026-06-01 @ 7:00 am |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Missoula MT on 2026-05-29 @ 12:37 pm |
| Headline: | Flood Watch issued May 29 at 11:37AM MDT until June 1 at 6:00AM MDT by NWS Missoula MT |
| Description: |
...The National Weather Service in Missoula has issued a Flood Watch for the following rivers in Montana... Flathead River At Columbia Falls affecting Flathead County. .Heavy rain combined with mountain snowpack melt may cause flows in rivers to increase quickly and reach critical levels. For the Flathead River...including At Columbia Falls...flooding is possible. * WHAT...Flooding is possible. * WHERE...Flathead River At Columbia Falls. * WHEN...From Saturday morning to Monday morning. * IMPACTS...At 13.0 feet, Farmers crops adjacent to the Flathead River are inundated with water. At 14.0 feet, Flooding of farmers crops adjacent to the Flathead River is likely. Sections of the Steel Bridge Road become inundated with water and impassable. * ADDITIONAL DETAILS... - At 10:45 AM MDT Friday the stage was 13.3 feet. - Flood stage is 14.0 feet. Forecast crest is 14.1 feet on Saturday afternoon. - https://www.weather.gov/mso/hydrology |
| Alert: | Flood Watch |
| Area(s): | Flathead, MT; Lake, MT; Missoula, MT |
| Effective: | 2026-05-29 @ 12:20 pm -> 2026-05-30 @ 1:00 pm |
| Onset: | 2026-06-01 @ 11:25 am -> 2026-06-03 @ 12:00 am |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Missoula MT on 2026-05-29 @ 12:20 pm |
| Headline: | Flood Watch issued May 29 at 11:20AM MDT until June 2 at 11:00PM MDT by NWS Missoula MT |
| Description: |
...The National Weather Service in Missoula has issued a Flood Watch for the following rivers in Montana... Swan River Near Bigfork affecting Flathead, Lake and Missoula Counties. .Heavy rain combined with mountain snowpack melt may cause flows in rivers to increase quickly and reach critical levels. For the Swan River...including Near Bigfork...flooding is possible. * WHAT...Flooding is possible. * WHERE...Swan River Near Bigfork. * WHEN...From Monday morning to Tuesday evening. * IMPACTS...At 6.5 feet, Flooding affects low lying areas adjacent to the river. At 6.6 feet, Flooding affects low lying areas north of Lion Creek Road and adjacent to the river. * ADDITIONAL DETAILS... - At 11:00 AM MDT Friday the stage was 4.8 feet. - Forecast...Flood stage may be reached late Monday morning. - Flood stage is 6.5 feet. Forecast crest is at 6.6 feet on the evening of June 1. - https://www.weather.gov/mso/hydrology |
| Alert: | Flash Flood Watch |
| Area(s): | Red Lodge Foothills; Absaroka/Beartooth Mountains; Northeast Bighorn Mountains |
| Effective: | 2026-05-29 @ 12:04 pm -> 2026-05-30 @ 12:15 pm |
| Onset: | 2026-05-30 @ 7:00 am -> 2026-05-31 @ 1:00 am |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Billings MT on 2026-05-29 @ 12:04 pm |
| Headline: | Flash Flood Watch issued May 29 at 11:04AM MDT until May 31 at 12:00AM MDT by NWS Billings MT |
| Description: |
* WHAT...Flash flooding and debris flows caused by excessive rainfall are possible over the Elk, Robertson Draw, and East Side Burn Areas on Saturday. * WHERE...Portions of south central Montana, including the following areas, Absaroka/Beartooth Mountains and Red Lodge Foothills and north central Wyoming, including the following area, Northeast Bighorn Mountains. * WHEN...From Saturday morning through Saturday evening. * IMPACTS...Periods of heavy rainfall with embedded thunderstorms are expected over the Elk, Robertson Draw, and East Side Burn Areas Saturday, possibly beginning early in the morning. Residents in and downstream of these burn scars should prepare for potential rapid runoff, flooding and debris flows. Narrow drainages and low-lying areas are especially prone to flood. Be sure to stay up to date with information from local authorities. * ADDITIONAL DETAILS... - Periods of heavy rainfall with embedded thunderstorms are expected across the region. The Elk Burn Area along the eastern slopes of the Bighorns, and the Robertson Draw and East Side Burn Areas south of Red Lodge, could experience flash flooding and debris flows. Stay alert! - http://www.weather.gov/safety/flood |
| Alert: | Flood Watch |
| Area(s): | Missoula, MT |
| Effective: | 2026-05-29 @ 11:57 am -> 2026-05-30 @ 1:00 pm |
| Onset: | 2026-05-31 @ 9:51 pm -> 2026-06-05 @ 2:00 am |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Missoula MT on 2026-05-29 @ 11:57 am |
| Headline: | Flood Watch issued May 29 at 10:57AM MDT until June 5 at 1:00AM MDT by NWS Missoula MT |
| Description: |
...The National Weather Service in Missoula has issued a Flood Watch for the following rivers in Montana... Clark Fork River Above Missoula affecting Missoula County. .Heavy rain combined with mountain snowpack melt may cause flows in rivers to increase quickly and reach critical levels. For the Clark Fork River...including Above Missoula...flooding is possible. * WHAT...Flooding is possible. * WHERE...Clark Fork River Above Missoula. * WHEN...From Sunday evening to late Thursday night. * IMPACTS...At 7.5 feet, Flooding of low lying areas adjacent to the river is possible. Flood waters begin to flood streets in the Orchard Homes area, specifically the north end of Tower Street including Kehrwald Drive. * ADDITIONAL DETAILS... - At 10:00 AM MDT Friday the stage was 6.1 feet. - Forecast...Flood stage may be reached Sunday evening. - Flood stage is 7.5 feet. Current forecast crest is at 8.6 feet on the evening of June 1. - https://www.weather.gov/mso/hydrology |