Yellowstone National Park, Wyoming

Regional Weather Alerts


     

Alert: Severe Thunderstorm Warning
Area(s): Flathead, MT; Lincoln, MT
Effective: 2026-08-22 @ 6:27 pm -> 2026-08-22 @ 7:15 pm
Onset: 2026-08-22 @ 6:27 pm -> 2026-08-22 @ 7:15 pm
Severity: Severe
Certainty: Observed
Urgency: Immediate
Issued By: NWS Missoula MT on 2026-08-22 @ 6:27 pm
Headline: Severe Thunderstorm Warning issued August 22 at 5:27PM MDT until August 22 at 6:15PM MDT by NWS Missoula MT
Description: SVRMSO

The National Weather Service in Missoula has issued a

* Severe Thunderstorm Warning for...
West Central Flathead County in northwestern Montana...
East Central Lincoln County in northwestern Montana...

* Until 615 PM MDT.

* At 527 PM MDT, a severe thunderstorm was located 17 miles southwest
of Whitefish, or 17 miles west of Kalispell, moving northeast at 40
mph.

HAZARD...60 mph wind gusts and small hail.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
Whitefish, Columbia Falls, Lupfer, Olney, Marion and La Salle.

Alert: Special Weather Statement
Area(s): Kootenai/Cabinet Region
Effective: 2026-08-22 @ 6:09 pm -> 2026-08-22 @ 7:15 pm
Onset: 2026-08-22 @ 6:09 pm
Severity: Moderate
Certainty: Observed
Urgency: Expected
Issued By: NWS Missoula MT on 2026-08-22 @ 6:09 pm
Headline: Special Weather Statement issued August 22 at 5:09PM MDT by NWS Missoula MT
Description: At 509 PM MDT, Doppler radar was tracking a strong thunderstorm 25
miles east of Libby, moving northeast at 20 mph.

HAZARD...Wind gusts up to 40 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...
Skillet Fire, Marion, and Kila.

Alert: Special Weather Statement
Area(s): Upper Blackfoot and MacDonald Pass; Helena Valley; Elkhorn and Boulder Mountains
Effective: 2026-08-22 @ 6:03 pm -> 2026-08-22 @ 6:45 pm
Onset: 2026-08-22 @ 6:03 pm
Severity: Moderate
Certainty: Observed
Urgency: Expected
Issued By: NWS Great Falls MT on 2026-08-22 @ 6:03 pm
Headline: Special Weather Statement issued August 22 at 5:03PM MDT by NWS Great Falls MT
Description: At 503 PM MDT, Doppler radar was tracking a cluster of strong
thunderstorms 8 miles southwest of Helena, moving northeast at 15
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 hail damage to vegetation is
possible.

Locations impacted include...
Helena, East Helena, Montana City, Rimini, Alhambra, Spring Meadow
Lake State Park, and Clancy.

Alert: Special Weather Statement
Area(s): Beaverhead and Western Madison below 6000ft; Ruby Mountains and Southern Beaverhead Mountains; Gallatin and Madison County Mountains and Centennial Mountains
Effective: 2026-08-22 @ 5:58 pm -> 2026-08-22 @ 6:45 pm
Onset: 2026-08-22 @ 5:58 pm
Severity: Moderate
Certainty: Observed
Urgency: Expected
Issued By: NWS Great Falls MT on 2026-08-22 @ 5:58 pm
Headline: Special Weather Statement issued August 22 at 4:58PM MDT by NWS Great Falls MT
Description: At 458 PM MDT, Doppler radar was tracking strong thunderstorms along
a line extending from 18 miles north of Lima to 11 miles north of
Monida to 14 miles west of Spencer. Movement was northeast at 35 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 hail damage to vegetation is
possible.

Locations impacted include...
Lima, Monida, and Snowline.

Alert: Special Weather Statement
Area(s): Kootenai/Cabinet Region
Effective: 2026-08-22 @ 5:30 pm -> 2026-08-22 @ 6:30 pm
Onset: 2026-08-22 @ 5:30 pm
Severity: Moderate
Certainty: Observed
Urgency: Expected
Issued By: NWS Missoula MT on 2026-08-22 @ 5:30 pm
Headline: Special Weather Statement issued August 22 at 4:30PM MDT by NWS Missoula MT
Description: At 430 PM MDT, Doppler radar was tracking a strong thunderstorm 10
miles southeast of Troy, or 9 miles west of Libby, moving northeast
at 15 mph.

HAZARD...Wind gusts up to 50 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...
Libby, Troy, Kootenai Falls and Yakt.

Alert: Lake Wind Advisory
Area(s): Central and Southeast Phillips; Central and Southern Valley; Petroleum; Garfield; McCone
Effective: 2026-08-22 @ 1:49 pm -> 2026-08-23 @ 4:00 am
Onset: 2026-08-22 @ 1:49 pm -> 2026-08-23 @ 4:00 am
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Glasgow MT on 2026-08-22 @ 1:49 pm
Headline: Lake Wind Advisory issued August 22 at 12:49PM MDT until August 23 at 3:00AM MDT by NWS Glasgow MT
Description: * WHAT...Southeast winds 15 to 25 mph with gusts up to 35 mph.

* WHERE...Fort Peck Lake.

* WHEN...Until 3 AM MDT Sunday.

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

* ADDITIONAL DETAILS...Waves up to 3 feet possible.

Alert: Red Flag Warning
Area(s): Kootenai National Forest/Talley Lake District/fnf; Western Lolo National Forest
Effective: 2026-08-22 @ 10:08 am -> 2026-08-23 @ 7:00 am
Onset: 2026-08-22 @ 6:00 pm -> 2026-08-23 @ 7:00 am
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Missoula MT on 2026-08-22 @ 10:08 am
Headline: Red Flag Warning issued August 22 at 9:08AM MDT until August 23 at 6:00AM MDT by NWS Missoula MT
Description: ...FIRE WEATHER WATCH IS CANCELLED FOR FLATHEAD RESERVATION AND EAST
BEAVERHEAD...

...RED FLAG WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO 6 AM MDT
SUNDAY DUE TO LIGHTNING FOR KOOTENAI AND WEST LOLO...

...RED FLAG WARNING IN EFFECT FROM 1 PM TO 8 PM MDT SUNDAY DUE TO
WIND AND LOW RELATIVE HUMIDITY FOR DEERLODGE/WEST BEAVERHEAD...

...

.Antecedent conditions have been very dry and warm. The Kootenai
Forest especially has received well below normal precipitation since
early July. Thunderstorms with little to no precipitation Saturday
evening and overnight will be followed Sunday with a dry cold front.
Increased winds and lowering relative humidities behind the front on
Sunday will bring critical fire weather conditions to southwest
Montana across Fire Weather Zone 110.

The National Weather Service in Missoula MT has issued a Red Flag
Warning in effect from 5 PM this afternoon to 6 AM MDT Sunday.

* AFFECTED AREA...Fire Weather Zones 104 and 106.

* TIMING...From 5 PM this afternoon to 6 AM MDT Sunday.

* LIGHTNING...Multiple rounds of thunderstorms expected this
afternoon, evening, and overnight into early Sunday morning. Little
to any precipitation is expected with dry thunderstorms.

* OUTFLOW WINDS...Through 10 pm thunderstorms will bring outflow
winds up to 50 mph. 5% chance for isolated wind gusts near 60 mph
for any given location.

* IMPACTS...Lightning strikes will have the potential to start new
fires, and gusty outflow winds could cause rapid spread of new and
existing wildfires.

Alert: Fire Weather Watch
Area(s): Salish and Kootenai Indian Reservation
Effective: 2026-08-22 @ 10:08 am -> 2026-08-22 @ 10:24 am
Onset: 2026-08-22 @ 6:00 pm -> 2026-08-23 @ 1:00 pm
Severity: Minor
Certainty: Observed
Urgency: Past
Issued By: NWS Missoula MT on 2026-08-22 @ 10:08 am
Headline: The Fire Weather Watch has been cancelled.
Description: The Fire Weather Watch has been cancelled and is no longer in effect.

Alert: Fire Weather Watch
Area(s): Kootenai National Forest/Talley Lake District/fnf; Western Lolo National Forest
Effective: 2026-08-22 @ 10:08 am -> 2026-08-22 @ 10:24 am
Onset: 2026-08-22 @ 6:00 pm -> 2026-08-23 @ 1:00 pm
Severity: Severe
Certainty: Observed
Urgency: Past
Issued By: NWS Missoula MT on 2026-08-22 @ 10:08 am
Headline: The Fire Weather Watch has been replaced. Please see the latest information from NWS Missoula MT on this developing situation.
Description: The Fire Weather Watch has been replaced. Please see the latest information from NWS Missoula MT on this developing situation.

Alert: Red Flag Warning
Area(s): Deerlodge/Western Beaverhead National Forest
Effective: 2026-08-22 @ 10:08 am -> 2026-08-23 @ 9:00 pm
Onset: 2026-08-23 @ 2:00 pm -> 2026-08-23 @ 9:00 pm
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Missoula MT on 2026-08-22 @ 10:08 am
Headline: Red Flag Warning issued August 22 at 9:08AM MDT until August 23 at 8:00PM MDT by NWS Missoula MT
Description: ...FIRE WEATHER WATCH IS CANCELLED FOR FLATHEAD RESERVATION AND EAST
BEAVERHEAD...

...RED FLAG WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO 6 AM MDT
SUNDAY DUE TO LIGHTNING FOR KOOTENAI AND WEST LOLO...

...RED FLAG WARNING IN EFFECT FROM 1 PM TO 8 PM MDT SUNDAY DUE TO
WIND AND LOW RELATIVE HUMIDITY FOR DEERLODGE/WEST BEAVERHEAD...

...

.Antecedent conditions have been very dry and warm. The Kootenai
Forest especially has received well below normal precipitation since
early July. Thunderstorms with little to no precipitation Saturday
evening and overnight will be followed Sunday with a dry cold front.
Increased winds and lowering relative humidities behind the front on
Sunday will bring critical fire weather conditions to southwest
Montana across Fire Weather Zone 110.

The National Weather Service in Missoula MT has issued a Red Flag
Warning in effect from 1 PM to 8 PM MDT Sunday.

* AFFECTED AREA...Fire Weather Zone 110.

* TIMING...From 1 PM to 8 PM MDT Sunday.

* WINDS...Southwest winds 15 to 20 mph with gusts of 25 to 40 mph.

* RELATIVE HUMIDITY...Relative Humidity between 15 to 25 percent.

* IMPACTS...Any fires that develop will spread rapidly. Outdoor
burning is not recommended.

Alert: Fire Weather Watch
Area(s): Eastern Beaverhead National Forest
Effective: 2026-08-22 @ 10:08 am -> 2026-08-22 @ 10:24 am
Onset: 2026-08-23 @ 1:00 pm -> 2026-08-23 @ 10:00 pm
Severity: Minor
Certainty: Observed
Urgency: Past
Issued By: NWS Missoula MT on 2026-08-22 @ 10:08 am
Headline: The Fire Weather Watch has been cancelled.
Description: The Fire Weather Watch has been cancelled and is no longer in effect.

Alert: Fire Weather Watch
Area(s): Deerlodge/Western Beaverhead National Forest
Effective: 2026-08-22 @ 10:08 am -> 2026-08-22 @ 10:24 am
Onset: 2026-08-23 @ 1:00 pm -> 2026-08-23 @ 10:00 pm
Severity: Severe
Certainty: Observed
Urgency: Past
Issued By: NWS Missoula MT on 2026-08-22 @ 10:08 am
Headline: The Fire Weather Watch has been replaced. Please see the latest information from NWS Missoula MT on this developing situation.
Description: The Fire Weather Watch has been replaced. Please see the latest information from NWS Missoula MT on this developing situation.