Yellowstone National Park, Wyoming

Regional Weather Alerts


     

Alert: Severe Thunderstorm Warning
Area(s): Big Horn, MT; Sheridan, WY
Effective: 2026-06-22 @ 5:47 pm -> 2026-06-22 @ 6:45 pm
Onset: 2026-06-22 @ 5:47 pm -> 2026-06-22 @ 6:45 pm
Severity: Severe
Certainty: Observed
Urgency: Immediate
Issued By: NWS Billings MT on 2026-06-22 @ 5:47 pm
Headline: Severe Thunderstorm Warning issued June 22 at 4:47PM MDT until June 22 at 5:45PM MDT by NWS Billings MT
Description: SVRBYZ

The National Weather Service in Billings has issued a

* Severe Thunderstorm Warning for...
Southeastern Big Horn County in south central Montana...
Eastern Sheridan County in north central Wyoming...

* Until 545 PM MDT.

* At 447 PM MDT, A severe thunderstorm was located 10 miles southeast
of Lodge Grass, or 31 miles northwest of Sheridan, moving southeast
at 55 mph.

THIS IS A DESTRUCTIVE STORM FOR EAST OF LODGE GRASS.

HAZARD...80 mph wind gusts and two inch hail.

SOURCE...A weather station west of Lodge Grass reported a wind gust
of 71 mph at 4:30.

IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be heavily damaged. Expect
considerable damage to roofs, windows, and vehicles.
Extensive tree damage and power outages are likely.

* Locations impacted include...
Tongue River Reservoir, Rosebud Battlefield Park and Wyola.

Alert: Flash Flood Warning
Area(s): Rosebud, MT
Effective: 2026-06-22 @ 4:42 pm -> 2026-06-22 @ 6:15 pm
Onset: 2026-06-22 @ 4:42 pm -> 2026-06-22 @ 6:15 pm
Severity: Severe
Certainty: Likely
Urgency: Immediate
Issued By: NWS Billings MT on 2026-06-22 @ 4:42 pm
Headline: Flash Flood Warning issued June 22 at 3:42PM MDT until June 22 at 5:15PM MDT by NWS Billings MT
Description: At 342 PM MDT, Doppler radar indicated thunderstorms producing heavy
rain over the North Remington/McGhee Burn Scar. Up to 1 inch of rain
has fallen. Flash flooding is ongoing or expected to begin shortly.
Excessive rainfall over the burn scar will result in debris flow. The
debris flow can consist of rock, mud, vegetation and other loose
materials.

HAZARD...Flash flooding caused by thunderstorms in and around the
North Remington/McGhee Burn Scar.

SOURCE...Radar indicated.

IMPACT...Flooding of areas in and downstream of the North
Remington/McGhee Burn Scar.

Some locations that will experience flash flooding include...
Birney and Birney Village.

Alert: Severe Thunderstorm Watch
Area(s): Big Horn, MT; Carter, MT; Custer, MT; Fallon, MT; Powder River, MT; Rosebud, MT; Sheridan, WY
Effective: 2026-06-22 @ 1:36 pm -> 2026-06-22 @ 9:00 pm
Onset: 2026-06-22 @ 1:36 pm -> 2026-06-22 @ 9:00 pm
Severity: Severe
Certainty: Possible
Urgency: Future
Issued By: NWS Billings MT on 2026-06-22 @ 1:36 pm
Headline: Severe Thunderstorm Watch issued June 22 at 12:36PM MDT until June 22 at 8:00PM MDT by NWS Billings MT
Description: THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH
376 IN EFFECT UNTIL 8 PM MDT THIS EVENING FOR THE FOLLOWING AREAS

IN MONTANA THIS WATCH INCLUDES 6 COUNTIES

IN SOUTH CENTRAL MONTANA

BIG HORN

IN SOUTHEAST MONTANA

CARTER CUSTER FALLON
POWDER RIVER ROSEBUD

IN WYOMING THIS WATCH INCLUDES 1 COUNTY

IN NORTH CENTRAL WYOMING

SHERIDAN

THIS INCLUDES THE CITIES OF ASHLAND, BAKER, BROADUS, COLSTRIP,
CROW AGENCY, EKALAKA, FORSYTH, HARDIN, LAME DEER, MILES CITY,
AND SHERIDAN.