Yellowstone National Park, Wyoming

Regional Weather Alerts


     

Alert: Flood Advisory
Area(s): Carter, MT
Effective: 2026-06-01 @ 6:34 pm -> 2026-06-01 @ 7:45 pm
Onset: 2026-06-01 @ 6:34 pm -> 2026-06-01 @ 7:45 pm
Severity: Minor
Certainty: Likely
Urgency: Expected
Issued By: NWS Billings MT on 2026-06-01 @ 6:34 pm
Headline: Flood Advisory issued June 1 at 5:34PM MDT until June 1 at 6:45PM MDT by NWS Billings MT
Description: * WHAT...Flooding caused by excessive rainfall continues.

* WHERE...South Central Carter County in southeastern Montana...

* WHEN...Until 645 PM MDT.

* IMPACTS...Radar indicates between one and two inches of rain has
fallen over the past 2 hours. Additional showers and thunderstorms
may produce further runoff.

Minor flooding in low-lying and poor drainage areas. Rises in small
streams and normally dry coulees.

Alert: Lake Wind Advisory
Area(s): Central and Southeast Phillips; Central and Southern Valley; Petroleum; Garfield; McCone
Effective: 2026-06-01 @ 6:26 pm -> 2026-06-02 @ 1:00 am
Onset: 2026-06-01 @ 6:26 pm -> 2026-06-02 @ 1:00 am
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Glasgow MT on 2026-06-01 @ 6:26 pm
Headline: Lake Wind Advisory issued June 1 at 5:26PM MDT until June 2 at 12:00AM MDT by NWS Glasgow MT
Description: * WHAT...Southwest winds 15 to 25 mph with gusts up to 35 mph.

* WHERE...Fort Peck Lake.

* WHEN...Until midnight MDT tonight.

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

* ADDITIONAL DETAILS...Look for wave heights in excess of 4 feet.

Alert: Special Weather Statement
Area(s): Treasure; Northern Rosebud; Northern Big Horn
Effective: 2026-06-01 @ 6:19 pm -> 2026-06-01 @ 7:15 pm
Onset: 2026-06-01 @ 6:19 pm
Severity: Moderate
Certainty: Observed
Urgency: Expected
Issued By: NWS Billings MT on 2026-06-01 @ 6:19 pm
Headline: Special Weather Statement issued June 1 at 5:19PM MDT by NWS Billings MT
Description: At 519 PM MDT, Doppler radar was tracking a line of strong
thunderstorms extending from 9 miles southeast of Hysham to 21 miles
southeast of Hysham, or extending from 9 miles southeast of Hysham to
20 miles northwest of Colstrip, moving northeast at 50 mph.

HAZARD...Wind gusts of 50 to 55 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...
Forsyth, Rosebud, Cartersville and Hathaway.

Alert: Flood Watch
Area(s): Missoula, MT
Effective: 2026-06-01 @ 12:52 pm -> 2026-06-02 @ 1:00 pm
Onset: 2026-06-01 @ 12:52 pm -> 2026-06-03 @ 1:00 pm
Severity: Severe
Certainty: Possible
Urgency: Future
Issued By: NWS Missoula MT on 2026-06-01 @ 12:52 pm
Headline: Flood Watch issued June 1 at 11:52AM 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...Until 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 Monday the stage was 7.0 feet.
- Forecast...Rises on the river are possible over the next few
days. The river may reach flood stage.
- Flood stage is 7.5 feet.
- https://www.weather.gov/mso/hydrology

Alert: Flood Watch
Area(s): West Glacier Region
Effective: 2026-06-01 @ 12:29 pm -> 2026-06-02 @ 1:00 pm
Onset: 2026-06-01 @ 12:29 pm -> 2026-06-02 @ 1:00 pm
Severity: Severe
Certainty: Possible
Urgency: Future
Issued By: NWS Missoula MT on 2026-06-01 @ 12:29 pm
Headline: Flood Watch issued June 1 at 11:29AM MDT until June 2 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
area, West Glacier Region.

This includes the following Specific Areas...
Going-to-the-Sun Road in Glacier Park.

* WHEN...Through Tuesday 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 0.3-0.7 inches for valley locations with 1
to 2 inches in the terrain are expected through Tuesday morning.
- https://www.weather.gov/mso/hydrology

Alert: Flood Warning
Area(s): Flathead, MT; Lake, MT; Sanders, MT
Effective: 2026-05-31 @ 8:42 pm -> 2026-06-01 @ 8:30 pm
Onset: 2026-05-31 @ 8:42 pm -> 2026-06-01 @ 8:30 pm
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Missoula MT on 2026-05-31 @ 8:42 pm
Headline: Flood Warning issued May 31 at 7:42PM MDT until June 1 at 7:30PM MDT by NWS Missoula MT
Description: * WHAT...Small stream flooding caused by excessive rainfall is
expected.

* WHERE...South Central Flathead County in northwestern Montana...
Western Lake County in northwestern Montana...


Small streams along the Mission and Swan mountain ranges.

* WHEN...Until 730 PM MDT Monday.

* IMPACTS...Flooding of rivers, creeks, streams, and other low-lying
and flood-prone locations is imminent or occurring. Streams
continue to rise due to excess runoff from earlier rainfall.

* ADDITIONAL DETAILS...
- At 736 PM MDT, emergency management reported heavy rain in the
warned area. Flooding is ongoing or expected to begin shortly.
Between 1 and 3 inches of rain have fallen.
- Additional rainfall amounts of 1 to 2 inches are possible in the
warned area.
- Some locations that will experience flooding include...
Polson, Evergreen, Columbia Falls, Ronan, St. Ignatius, Pablo,
Woods Bay, and Bigfork.
- Small streams along the Mission and Swan mountain ranges.
- https://www.weather.gov/mso/hydrology