Yellowstone National Park, Wyoming

Regional Weather Alerts


     

Alert: Flood Watch
Area(s): Musselshell; Treasure; Northern Rosebud; Custer; Fallon; Northern Stillwater; Powder River; Carter; Northern Park; Golden Valley; Red Lodge Foothills; Northern Big Horn; Southern Rosebud; Judith Gap; Paradise Valley; Livingston Area; Beartooth Foothills; Absaroka/Beartooth Mountains; Crazy Mountains; Southern Big Horn; Southeastern Carbon; Northern Sweet Grass; Bighorn Canyon; Northern Carbon; Pryor/Northern Bighorn Mountains; Melville Foothills; Northeastern Yellowstone; Southern Wheatland; Southwestern Yellowstone; Northeast Bighorn Mountains; Sheridan Foothills
Effective: 2026-09-19 @ 11:40 pm -> 2026-09-20 @ 7:00 pm
Onset: 2026-09-19 @ 11:40 pm -> 2026-09-20 @ 7:00 pm
Severity: Severe
Certainty: Possible
Urgency: Future
Issued By: NWS Billings MT on 2026-09-19 @ 11:40 pm
Headline: Flood Watch issued September 19 at 10:40PM MDT until September 20 at 6:00PM MDT by NWS Billings MT
Description: A slow moving weather system will continue to impact the region
through Sunday. The risk of flooding continues, especially over
Southeast Montana and Northeast Wyoming.

* WHAT...Flooding caused by excessive rainfall is possible, along
with flash flooding over recent burn scars.

* WHERE...All of South Central and Southeast Montana, and Sheridan
County Wyoming.

* WHEN...Through Sunday afternoon.

* IMPACTS...Excessive runoff may result in flooding of creeks and
other low-lying and flood-prone locations. Flooding may occur in
poor drainage and urban areas.

* ADDITIONAL DETAILS...
- The heaviest rainfall is slowly shifting over Southeastern
Montana and Northeast Wyoming. The risk of flooding over
south-centeral Montana is decreasing.
- The Robertson Draw, East Side, Elk, and McGhee-Remington burn
scars are particularly vulnerable to Flash Flooding and debris
flows. Any other burn scars from this summer will have elevated
Flash Flood potential as well.
- http://www.weather.gov/safety/flood

Alert: Flood Watch
Area(s): Petroleum; Garfield; Dawson; Prairie; Wibaux
Effective: 2026-09-19 @ 2:15 pm -> 2026-09-20 @ 5:15 am
Onset: 2026-09-19 @ 2:15 pm -> 2026-09-20 @ 7:00 pm
Severity: Severe
Certainty: Possible
Urgency: Future
Issued By: NWS Glasgow MT on 2026-09-19 @ 2:15 pm
Headline: Flood Watch issued September 19 at 1:15PM MDT until September 20 at 6:00PM MDT by NWS Glasgow MT
Description: * WHAT...Flooding caused by excessive rainfall continues to be
possible.

* WHERE...A portion of northeast Montana, including the following
counties, Dawson, Garfield, Petroleum, Prairie and Wibaux.

* WHEN...Through Sunday 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...
- Heavy rain is expected along and south of MT 200 between Winnett,
Jordan and Glendive and south of I 94 between Glendive and Wibaux
today, tonight, and Sunday morning. Between one and two inches of
rain is likely with heavier rain possible in embedded
thunderstorms.
- http://www.weather.gov/safety/flood

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