Yellowstone National Park, Wyoming

Regional Weather Alerts


     

Alert: Lake Wind Advisory
Area(s): Central and Southeast Phillips; Central and Southern Valley; Petroleum; Garfield; McCone
Effective: 2026-05-31 @ 3:18 pm -> 2026-06-01 @ 7:30 am
Onset: 2026-05-31 @ 3:18 pm -> 2026-06-01 @ 7:00 pm
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Glasgow MT on 2026-05-31 @ 3:18 pm
Headline: Lake Wind Advisory issued May 31 at 2:18PM MDT until June 1 at 6:00PM MDT by NWS Glasgow MT
Description: * WHAT...West winds 20 to 30 mph with gusts up to 40 mph.

* WHERE...Fort Peck Lake.

* WHEN...Until 6 PM MDT Monday.

* IMPACTS...Strong winds and rough waves on area lakes will create
hazardous conditions for small craft.

* ADDITIONAL DETAILS...Wave heights in excess of 4 feet.

Alert: Flood Watch
Area(s): Flathead, MT
Effective: 2026-05-31 @ 12:45 pm -> 2026-06-01 @ 1:15 pm
Onset: 2026-05-31 @ 12:45 pm -> 2026-06-02 @ 1:00 pm
Severity: Severe
Certainty: Possible
Urgency: Future
Issued By: NWS Missoula MT on 2026-05-31 @ 12:45 pm
Headline: Flood Watch issued May 31 at 11:45AM MDT until June 2 at 12:00PM MDT by NWS Missoula MT
Description: ...The Flood Watch is extended for the following rivers in Montana...

Flathead River At Columbia Falls affecting Flathead County.

* WHAT...Flooding is possible.

* WHERE...Flathead River At Columbia Falls.

* WHEN...Until Tuesday afternoon.

* 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 Sunday the stage was 13.0 feet.
- Forecast...The river is forecast to crest tonight into Monday
morning at 13.5 feet.
- Flood stage is 14.0 feet.
- https://www.weather.gov/mso/hydrology

Alert: Flood Watch
Area(s): Missoula, MT
Effective: 2026-05-31 @ 12:33 pm -> 2026-06-01 @ 1:15 pm
Onset: 2026-05-31 @ 9:51 pm -> 2026-06-03 @ 1:00 pm
Severity: Severe
Certainty: Possible
Urgency: Future
Issued By: NWS Missoula MT on 2026-05-31 @ 12:33 pm
Headline: Flood Watch issued May 31 at 11:33AM MDT until June 3 at 12:00PM MDT by NWS Missoula MT
Description: ......The Flood Watch continues for the following rivers in
Montana...

Clark Fork River Above Missoula affecting Missoula County.

* WHAT...Flooding is possible.

* WHERE...Clark Fork River Above Missoula.

* WHEN...From this evening to Wednesday afternoon.

* 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 11:00 AM MDT Sunday the stage was 6.5 feet.
- Forecast...Rises on the river are forecast into Monday, flood
stage may be reached late Monday morning. Current forecast crest
is at 7.5 feet.
- Flood stage is 7.5 feet.
- https://www.weather.gov/mso/hydrology

Alert: Flood Advisory
Area(s): Cascade, MT; Glacier, MT; Lewis and Clark, MT; Pondera, MT; Teton, MT; Toole, MT
Effective: 2026-05-31 @ 11:49 am -> 2026-06-01 @ 1:00 am
Onset: 2026-05-31 @ 11:49 am -> 2026-06-01 @ 1:00 am
Severity: Minor
Certainty: Likely
Urgency: Expected
Issued By: NWS Great Falls MT on 2026-05-31 @ 11:49 am
Headline: Flood Advisory issued May 31 at 10:49AM MDT until June 1 at 12:00AM MDT by NWS Great Falls MT
Description: * WHAT...Minor flooding in areas of poor drainage and elevated
streamflows are expected.

* WHERE...Portions of central, north central, and west central
Montana, including the following counties, in central Montana,
Cascade. In north central Montana, Glacier, Pondera, Teton and
Toole. In west central Montana, Lewis and Clark.

* WHEN...Until midnight MDT tonight.

* IMPACTS...Minor flooding in urban and rural areas of poor
drainage. Some river and stream levels are elevated and will see
additional rises to around bankful.

* ADDITIONAL DETAILS...
- At 1022 AM MDT, Moderate to heavy rainfall accumulations of 1
to 2 inches have occurred across the advisory area over the
last 24 hours, leading to elevated flow on some creeks and
rivers and ponding of water in areas with poor drainage.
- Additional rainfall amounts of 0.2 to 0.5 inches are expected
at lower elevations through this evening with up to 1 inch of
additional rainfall across areas near GLacier National Park
and the Little Belt and Highwood Mountains.
- Some locations that may experience minor flooding from
elevated stream flow include...

Some creeks originating in the Highwood and Little Belt
Mountains.

The Marias and St. Mary Rivers and tributaries in Glacier
county including Badger Creek, Two-medicine River and Cut
Bank Creek.

- Additionally, the Sun river will remain at elevated levels
and is forecast to remain just under bankful through Monday.
- http://www.weather.gov/safety/flood

Alert: Flood Watch
Area(s): West Glacier Region; Flathead/Mission Valleys
Effective: 2026-05-31 @ 11:42 am -> 2026-06-01 @ 1:00 pm
Onset: 2026-05-31 @ 11:42 am -> 2026-06-01 @ 1:00 pm
Severity: Severe
Certainty: Possible
Urgency: Future
Issued By: NWS Missoula MT on 2026-05-31 @ 11:42 am
Headline: Flood Watch issued May 31 at 10:42AM MDT until June 1 at 12:00PM MDT by NWS Missoula MT
Description: * WHAT...Flooding caused by rain and snowmelt continues to be
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...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...
- Additional rainfall of 0.4-0.8 inches for valley locations with 1
to 2 inches in the terrain are expected Sunday late morning
through Monday afternoon.
- https://www.weather.gov/mso/hydrology

Alert: Winter Weather Advisory
Area(s): Absaroka/Beartooth Mountains
Effective: 2026-05-31 @ 10:03 am -> 2026-06-01 @ 1:00 am
Onset: 2026-05-31 @ 10:03 am -> 2026-06-01 @ 1:00 am
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Billings MT on 2026-05-31 @ 10:03 am
Headline: Winter Weather Advisory issued May 31 at 9:03AM MDT until June 1 at 12:00AM MDT by NWS Billings MT
Description: * WHAT...Snow showers over the Beartooth Highway. Snow accumulation
up to 1 inch above 9000 feet.

* WHERE...Absaroka/Beartooth Mountains.

* WHEN...Until midnight MDT tonight.

* IMPACTS...Travel on the Beartooth Highway will be impacted by
wintry conditions at times, mainly at elevations above Vista Point.

* ADDITIONAL DETAILS...Those with recreation plans in the high
country should be prepared for wintry conditions.