Yellowstone National Park, Wyoming

Regional Weather Alerts


     

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Description: The Fire Weather Watch has been cancelled and is no longer in effect.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.

Alert: Lake Wind Advisory
Area(s): Central and Southeast Phillips; Central and Southern Valley; Petroleum; Garfield; McCone
Effective: 2026-08-22 @ 3:59 am -> 2026-08-23 @ 4:00 am
Onset: 2026-08-22 @ 1:00 pm -> 2026-08-23 @ 4:00 am
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Glasgow MT on 2026-08-22 @ 3:59 am
Headline: Lake Wind Advisory issued August 22 at 2:59AM MDT until August 23 at 3:00AM MDT by NWS Glasgow MT
Description: * WHAT...Southeast winds 10 to 20 mph with gusts up to 35 mph
expected.

* WHERE...Fort Peck Lake.

* WHEN...From noon today to 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.