Yellowstone National Park, Wyoming

Regional Weather Alerts


     

Alert: Red Flag Warning
Area(s): Deerlodge/Western Beaverhead National Forest; Eastern Beaverhead National Forest
Effective: 2026-08-06 @ 2:35 pm -> 2026-08-06 @ 10:45 pm
Onset: 2026-08-06 @ 2:35 pm -> 2026-08-06 @ 10:00 pm
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Missoula MT on 2026-08-06 @ 2:35 pm
Headline: Red Flag Warning issued August 6 at 1:35PM MDT until August 6 at 9:00PM MDT by NWS Missoula MT
Description: ...FIRE WEATHER WATCH IN EFFECT FROM FRIDAY AFTERNOON THROUGH
SATURDAY EVENING DUE TO WIND AND LOW RELATIVE HUMIDITY FOR
DEERLODGE/WEST BEAVERHEAD, EAST BEAVERHEAD, EAST LOLO, AND
BITTERROOT...

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING DUE
TO WIND AND LOW RELATIVE HUMIDITY FOR DEERLODGE/WEST BEAVERHEAD AND
EAST BEAVERHEAD...

...FIRE WEATHER WATCH IN EFFECT FROM FRIDAY MORNING THROUGH SATURDAY
EVENING DUE TO WIND AND LOW RELATIVE HUMIDITY FOR PALOUSE/HELLS
CANYON...

...FIRE WEATHER WATCH IN EFFECT FROM SATURDAY AFTERNOON THROUGH
SATURDAY EVENING DUE TO WIND AND LOW RELATIVE HUMIDITY FOR WEST LOLO
AND FLATHEAD RESERVATION...

...

.Increasingly, hot, dry, and breezy if not windy conditions are
expected to continue and peak on Saturday August 8th. Poor overnight
recoveries, with elevated temperatures and dry conditions, remain
expected above valley floors and in higher terrain.

The National Weather Service in Missoula MT has issued a Fire Weather
Watch in effect from Friday afternoon through Saturday evening.

* AFFECTED AREA...Fire Weather Zones 110 and 111.

* TIMING...For the Red Flag Warning, until 9 PM MDT this evening. For
the Fire Weather Watch, from Friday afternoon through Saturday
evening.

* WINDS...For the Red Flag Warning, northwest winds 10 to 15 mph with
gusts up to 30 mph, and for the Fire Weather Watch, west winds 10
to 20 mph with gusts up to 35 mph.

* RELATIVE HUMIDITY...For the Red Flag Warning, Relative Humidity
between 5 to 20 percent, and for the Fire Weather Watch, Relative
Humidity between 5 to 15 percent.

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

Alert: Fire Weather Watch
Area(s): Eastern Lolo National Forest/Welcome Creek And Scapegoat Wildernesses; Bitterroot National Forest
Effective: 2026-08-06 @ 2:35 pm -> 2026-08-06 @ 10:45 pm
Onset: 2026-08-07 @ 1:00 pm -> 2026-08-08 @ 10:00 pm
Severity: Severe
Certainty: Possible
Urgency: Future
Issued By: NWS Missoula MT on 2026-08-06 @ 2:35 pm
Headline: Fire Weather Watch issued August 6 at 1:35PM MDT until August 8 at 9:00PM MDT by NWS Missoula MT
Description: ...FIRE WEATHER WATCH IN EFFECT FROM FRIDAY AFTERNOON THROUGH
SATURDAY EVENING DUE TO WIND AND LOW RELATIVE HUMIDITY FOR
DEERLODGE/WEST BEAVERHEAD, EAST BEAVERHEAD, EAST LOLO, AND
BITTERROOT...

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING DUE
TO WIND AND LOW RELATIVE HUMIDITY FOR DEERLODGE/WEST BEAVERHEAD AND
EAST BEAVERHEAD...

...FIRE WEATHER WATCH IN EFFECT FROM FRIDAY MORNING THROUGH SATURDAY
EVENING DUE TO WIND AND LOW RELATIVE HUMIDITY FOR PALOUSE/HELLS
CANYON...

...FIRE WEATHER WATCH IN EFFECT FROM SATURDAY AFTERNOON THROUGH
SATURDAY EVENING DUE TO WIND AND LOW RELATIVE HUMIDITY FOR WEST LOLO
AND FLATHEAD RESERVATION...

...

.Increasingly, hot, dry, and breezy if not windy conditions are
expected to continue and peak on Saturday August 8th. Poor overnight
recoveries, with elevated temperatures and dry conditions, remain
expected above valley floors and in higher terrain.

The National Weather Service in Missoula MT has issued a Fire Weather
Watch.

* AFFECTED AREA...Fire Weather Zones 108 and 109.

* TIMING...From Friday afternoon through Saturday evening.

* WINDS...West winds 10 to 15 mph with gusts up to 35 mph.

* RELATIVE HUMIDITY...Relative Humidity between 5 to 20 percent.

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

Alert: Fire Weather Watch
Area(s): Western Lolo National Forest; Salish and Kootenai Indian Reservation
Effective: 2026-08-06 @ 2:35 pm -> 2026-08-06 @ 10:45 pm
Onset: 2026-08-08 @ 1:00 pm -> 2026-08-08 @ 10:00 pm
Severity: Severe
Certainty: Possible
Urgency: Future
Issued By: NWS Missoula MT on 2026-08-06 @ 2:35 pm
Headline: Fire Weather Watch issued August 6 at 1:35PM MDT until August 8 at 9:00PM MDT by NWS Missoula MT
Description: ...FIRE WEATHER WATCH IN EFFECT FROM FRIDAY AFTERNOON THROUGH
SATURDAY EVENING DUE TO WIND AND LOW RELATIVE HUMIDITY FOR
DEERLODGE/WEST BEAVERHEAD, EAST BEAVERHEAD, EAST LOLO, AND
BITTERROOT...

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING DUE
TO WIND AND LOW RELATIVE HUMIDITY FOR DEERLODGE/WEST BEAVERHEAD AND
EAST BEAVERHEAD...

...FIRE WEATHER WATCH IN EFFECT FROM FRIDAY MORNING THROUGH SATURDAY
EVENING DUE TO WIND AND LOW RELATIVE HUMIDITY FOR PALOUSE/HELLS
CANYON...

...FIRE WEATHER WATCH IN EFFECT FROM SATURDAY AFTERNOON THROUGH
SATURDAY EVENING DUE TO WIND AND LOW RELATIVE HUMIDITY FOR WEST LOLO
AND FLATHEAD RESERVATION...

...

.Increasingly, hot, dry, and breezy if not windy conditions are
expected to continue and peak on Saturday August 8th. Poor overnight
recoveries, with elevated temperatures and dry conditions, remain
expected above valley floors and in higher terrain.

The National Weather Service in Missoula MT has issued a Fire Weather
Watch.

* AFFECTED AREA...Fire Weather Zones 106 and 107.

* TIMING...From Saturday afternoon through Saturday evening.

* WINDS...West winds 5 to 15 mph with gusts up to 30 mph.

* RELATIVE HUMIDITY...Relative Humidity between 5 to 20 percent.

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

Alert: Fire Weather Watch
Area(s): Deerlodge/Western Beaverhead National Forest; Eastern Beaverhead National Forest
Effective: 2026-08-06 @ 2:35 pm -> 2026-08-06 @ 10:45 pm
Onset: 2026-08-07 @ 1:00 pm -> 2026-08-08 @ 10:00 pm
Severity: Severe
Certainty: Possible
Urgency: Future
Issued By: NWS Missoula MT on 2026-08-06 @ 2:35 pm
Headline: Fire Weather Watch issued August 6 at 1:35PM MDT until August 8 at 9:00PM MDT by NWS Missoula MT
Description: ...FIRE WEATHER WATCH IN EFFECT FROM FRIDAY AFTERNOON THROUGH
SATURDAY EVENING DUE TO WIND AND LOW RELATIVE HUMIDITY FOR
DEERLODGE/WEST BEAVERHEAD, EAST BEAVERHEAD, EAST LOLO, AND
BITTERROOT...

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING DUE
TO WIND AND LOW RELATIVE HUMIDITY FOR DEERLODGE/WEST BEAVERHEAD AND
EAST BEAVERHEAD...

...FIRE WEATHER WATCH IN EFFECT FROM FRIDAY MORNING THROUGH SATURDAY
EVENING DUE TO WIND AND LOW RELATIVE HUMIDITY FOR PALOUSE/HELLS
CANYON...

...FIRE WEATHER WATCH IN EFFECT FROM SATURDAY AFTERNOON THROUGH
SATURDAY EVENING DUE TO WIND AND LOW RELATIVE HUMIDITY FOR WEST LOLO
AND FLATHEAD RESERVATION...

...

.Increasingly, hot, dry, and breezy if not windy conditions are
expected to continue and peak on Saturday August 8th. Poor overnight
recoveries, with elevated temperatures and dry conditions, remain
expected above valley floors and in higher terrain.

The National Weather Service in Missoula MT has issued a Fire Weather
Watch in effect from Friday afternoon through Saturday evening.

* AFFECTED AREA...Fire Weather Zones 110 and 111.

* TIMING...For the Red Flag Warning, until 9 PM MDT this evening. For
the Fire Weather Watch, from Friday afternoon through Saturday
evening.

* WINDS...For the Red Flag Warning, northwest winds 10 to 15 mph with
gusts up to 30 mph, and for the Fire Weather Watch, west winds 10
to 20 mph with gusts up to 35 mph.

* RELATIVE HUMIDITY...For the Red Flag Warning, Relative Humidity
between 5 to 20 percent, and for the Fire Weather Watch, Relative
Humidity between 5 to 15 percent.

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

Alert: Fire Weather Watch
Area(s): Lincoln Ranger District of the Helena National Forest; Central and Eastern Lewis and Clark National Forest Areas; Helena and Townsend Ranger Districts of the Helena National Forest
Effective: 2026-08-06 @ 2:14 pm -> 2026-08-07 @ 7:30 am
Onset: 2026-08-07 @ 1:00 pm -> 2026-08-08 @ 10:00 pm
Severity: Severe
Certainty: Possible
Urgency: Future
Issued By: NWS Great Falls MT on 2026-08-06 @ 2:14 pm
Headline: Fire Weather Watch issued August 6 at 1:14PM MDT until August 8 at 9:00PM MDT by NWS Great Falls MT
Description: The National Weather Service in Great Falls has issued a Fire
Weather Watch for hot temperatures, gusty winds, and low relative
humidity, which is in effect from Friday afternoon through
Saturday evening.

* AFFECTED AREA...Lincoln Ranger District of the Helena National
Forest, Central and Eastern Lewis and Clark National Forest Areas
and Helena and Townsend Ranger Districts of the Helena National
Forest.

* WINDS...West 10 to 20 mph with gusts up to 30 mph.

* RELATIVE HUMIDITY...As low as 8 percent.

* TEMPERATURES...Up to 95 degrees.

* IMPACTS...Any fires that develop will spread rapidly. Containment
of any ongoing or new fires may be very difficult. Outdoor
burning is not recommended.

Alert: Red Flag Warning
Area(s): Dawson/McCone/Prairie/Richland/Wibaux Counties
Effective: 2026-08-06 @ 1:53 pm -> 2026-08-06 @ 8:00 pm
Onset: 2026-08-06 @ 1:53 pm -> 2026-08-06 @ 8:00 pm
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Glasgow MT on 2026-08-06 @ 1:53 pm
Headline: Red Flag Warning issued August 6 at 12:53PM MDT until August 6 at 7:00PM MDT by NWS Glasgow MT
Description: * WIND...Northwest at 15 to 25 mph with gusts to 35 mph.

* HUMIDITY...As low as 10 percent.

* THUNDERSTORMS...None

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

Alert: Red Flag Warning
Area(s): The Lower Missouri River Breaks including the Charles M Russell National Wildlife Refuge; Southern Petroleum and Southern Garfield Counties
Effective: 2026-08-06 @ 1:53 pm -> 2026-08-06 @ 10:00 pm
Onset: 2026-08-06 @ 1:53 pm -> 2026-08-06 @ 8:00 pm
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Glasgow MT on 2026-08-06 @ 1:53 pm
Headline: Red Flag Warning issued August 6 at 12:53PM MDT until August 6 at 7:00PM MDT by NWS Glasgow MT
Description: ...FIRE WEATHER WATCH IN EFFECT FROM SATURDAY AFTERNOON THROUGH
SATURDAY EVENING FOR STRONG WINDS AND LOW RELATIVE HUMIDITY FOR
FIRE WEATHER ZONES 136 AND 137...

The National Weather Service in Glasgow has issued a Fire Weather
Watch, which is in effect from Saturday afternoon through
Saturday evening.

* WIND...Northwest at 15 to 25 mph with gusts to 35 mph.

* HUMIDITY...As low as 10 percent.

* THUNDERSTORMS...None

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

Alert: Fire Weather Watch
Area(s): The Lower Missouri River Breaks including the Charles M Russell National Wildlife Refuge; Southern Petroleum and Southern Garfield Counties
Effective: 2026-08-06 @ 1:53 pm -> 2026-08-06 @ 10:00 pm
Onset: 2026-08-08 @ 1:00 pm -> 2026-08-08 @ 9:00 pm
Severity: Severe
Certainty: Possible
Urgency: Future
Issued By: NWS Glasgow MT on 2026-08-06 @ 1:53 pm
Headline: Fire Weather Watch issued August 6 at 12:53PM MDT until August 8 at 8:00PM MDT by NWS Glasgow MT
Description: ...FIRE WEATHER WATCH IN EFFECT FROM SATURDAY AFTERNOON THROUGH
SATURDAY EVENING FOR STRONG WINDS AND LOW RELATIVE HUMIDITY FOR
FIRE WEATHER ZONES 136 AND 137...

The National Weather Service in Glasgow has issued a Fire Weather
Watch, which is in effect from Saturday afternoon through
Saturday evening.

* WIND...Northwest at 15 to 25 mph with gusts to 35 mph.

* HUMIDITY...As low as 10 percent.

* THUNDERSTORMS...None

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

Alert: Red Flag Warning
Area(s): Custer County; Sioux Ranger District Custer National Forest
Effective: 2026-08-06 @ 1:32 pm -> 2026-08-06 @ 9:00 pm
Onset: 2026-08-06 @ 1:32 pm -> 2026-08-06 @ 9:00 pm
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Billings MT on 2026-08-06 @ 1:32 pm
Headline: Red Flag Warning issued August 6 at 12:32PM MDT until August 6 at 8:00PM MDT by NWS Billings MT
Description: * IMPACTS: Low humidities, hot temperatures, gusty winds, and a
wind shift with a cold front will create erratic fire behavior.

* AFFECTED AREA:
In Southeast MT Fire Zone...132.
In Southeast MT and Northwest SD Fire Zone...133.

* COUNTIES AFFECTED:
In Northwest SD...Harding.
In Southeast MT...Carter...Custer...Fallon.

* COLD FRONT: A cold front arriving early this afternoon will shift
winds to the northwest and increase wind speeds this afternoon
and early evening.

* WIND: Northwest 10 to 20 mph with gusts up to 30 mph.

* HUMIDITY: As low as 10 percent.

* TEMPERATURES: Up to 95 degrees.

Alert: Fire Weather Watch
Area(s): Gallatin National Forest; Wheatland County/Sweet Grass County; Stillwater County; Beartooth Ranger District Custer National Forest; Golden Valley County/Musselshell County; Yellowstone County; Crow Indian Reservation/Big Horn Canyon Rec Area; Northern Rosebud/Northern Treasure Counties; Northern Cheyenne Indian Reservation/Ashland Ranger District Custer Natl Forest; Sheridan County/Casper BLM; Bighorn National Forest
Effective: 2026-08-06 @ 1:32 pm -> 2026-08-07 @ 1:45 pm
Onset: 2026-08-08 @ 12:00 pm -> 2026-08-08 @ 10:00 pm
Severity: Severe
Certainty: Possible
Urgency: Future
Issued By: NWS Billings MT on 2026-08-06 @ 1:32 pm
Headline: Fire Weather Watch issued August 6 at 12:32PM MDT until August 8 at 9:00PM MDT by NWS Billings MT
Description: The National Weather Service in Billings has issued a Fire Weather
Watch...which is in effect from Saturday morning through Saturday
evening.

* IMPACTS: Low humidities, hot temperatures, and strong gusty winds
will create erratic fire behavior.

* AFFECTED AREA:
In North Central WY Fire Zones...274...284.
In South Central MT Fire Zones...123...124...125...126...127
128...129.
In Southeast MT Fire Zones...130...131.

* COUNTIES AFFECTED:
In Central MT...Golden Valley...Musselshell...Wheatland.
In North Central WY...Big Horn...Johnson...Sheridan...Washakie.
In South Central MT...Big Horn...Carbon...Park...Stillwater
Sweet Grass...Yellowstone.
In Southeast MT...Powder River...Rosebud...Treasure.
In Southwest MT...Gallatin.

* WIND: Northwest 10 to 20 mph with gusts up to 30 mph.

* HUMIDITY: Minimums of 9 to 14 percent.

* TEMPERATURES: Highs in the 90s to near 100 degrees.

Alert: Air Quality Alert
Area(s): Beaverhead, MT; Deer Lodge, MT; Flathead, MT; Granite, MT; Lake, MT; Lincoln, MT; Madison, MT; Mineral, MT; Missoula, MT; Ravalli, MT; Sanders, MT; Silver Bow, MT
Effective: 2026-08-06 @ 8:15 am -> 2026-08-07 @ 10:00 am
Onset: 2026-08-06 @ 8:15 am
Severity: Unknown
Certainty: Unknown
Urgency: Unknown
Issued By: NWS Great Falls MT on 2026-08-06 @ 8:34 am
Headline: Air Quality Alert issued August 6 at 7:15AM MDT by NWS Great Falls MT
Description: AQAMT

The Montana Department of Environmental Quality has issued an air
quality alert for Beaverhead, Deer Lodge, Flathead, Granite, Lake,
Lincoln, Madison, Mineral, Ravalli, Sanders, Silver Bow, and Missoula
counties in effect until 9AM on 08/07/2026
An Air Quality Alert means that particulates have been trending
upwards and that an exceedance of the 24 hour National Ambient Air
Quality Standard (NAAQS) has occurred or may occur in the near
future.

Elevated particulate levels from wildfire smoke

As of 7AM on 08/06/2026, particulate levels in Frenchtown, Hamilton
and Libby are Unhealthy for Sensitive Groups.

As of 7AM on 08/06/2026, particulate levels in Billings, Butte,
Columbia Falls, Cut Bank, Dillon, Great Falls, Helena, Lewistown,
Missoula, Sleeping Giant and Thompson Falls are Moderate.

When air quality is Unhealthy for Sensitive Groups... State and local
health officials recommend that people with respiratory or heart
disease, the elderly and children should limit prolonged exertion.

When air quality is Moderate... State and local health officials
recommend that unusually sensitive people should consider reducing
prolonged or heavy exertion.

For more information visit the Montana Department of Environmental
Quality at http://todaysair.mtdeq.us

Alert: Lake Wind Advisory
Area(s): Central and Southeast Phillips; Central and Southern Valley; Petroleum; Garfield; McCone
Effective: 2026-08-06 @ 4:35 am -> 2026-08-06 @ 8:00 pm
Onset: 2026-08-06 @ 10:00 am -> 2026-08-06 @ 8:00 pm
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Glasgow MT on 2026-08-06 @ 4:35 am
Headline: Lake Wind Advisory issued August 6 at 3:35AM MDT until August 6 at 7:00PM MDT by NWS Glasgow MT
Description: * WHAT...Northwest winds 15 to 25 mph with gusts up to 35 mph
expected.

* WHERE...Fort Peck Lake.

* WHEN...From 9 AM this morning to 7 PM MDT this evening.

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

* ADDITIONAL DETAILS...Waves up to 4 feet are expected on Fort Peck
Lake today.