Yellowstone National Park, Wyoming

Regional Weather Alerts


     

Alert: Red Flag Warning
Area(s): Dawson/McCone/Prairie/Richland/Wibaux Counties; Southern Petroleum and Southern Garfield Counties
Effective: 2026-09-09 @ 1:56 pm -> 2026-09-10 @ 5:00 am
Onset: 2026-09-10 @ 1:00 pm -> 2026-09-10 @ 9:00 pm
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Glasgow MT on 2026-09-09 @ 1:56 pm
Headline: Red Flag Warning issued September 9 at 12:56PM MDT until September 10 at 8:00PM MDT by NWS Glasgow MT
Description: The National Weather Service in Glasgow has issued a Red Flag
Warning, which is in effect from noon to 8 PM MDT Thursday. The
Fire Weather Watch is no longer in effect.


* WIND...WEST AT 10 TO 20 WITH GUSTS TO 30 MPH.

* HUMIDITY...AS LOW AS 11 PERCENT.

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

Alert: Red Flag Warning
Area(s): Sioux Ranger District Custer National Forest
Effective: 2026-09-09 @ 11:21 am -> 2026-09-10 @ 11:30 am
Onset: 2026-09-10 @ 1:00 pm -> 2026-09-10 @ 9:00 pm
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Billings MT on 2026-09-09 @ 11:21 am
Headline: Red Flag Warning issued September 9 at 10:21AM MDT until September 10 at 8:00PM MDT by NWS Billings MT
Description: The National Weather Service in Billings has issued a Red Flag
Warning...which is in effect from noon to 8 PM MDT Thursday.

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

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

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

* WIND: West 10 to 20 mph with gusts up to 35 mph.

* HUMIDITY: As low as 12 percent.

* TEMPERATURES: Up to 90.

Alert: Red Flag Warning
Area(s): Gallatin National Forest; Wheatland County/Sweet Grass County; Golden Valley County/Musselshell County
Effective: 2026-09-09 @ 11:21 am -> 2026-09-10 @ 11:30 am
Onset: 2026-09-10 @ 1:00 pm -> 2026-09-10 @ 9:00 pm
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Billings MT on 2026-09-09 @ 11:21 am
Headline: Red Flag Warning issued September 9 at 10:21AM MDT until September 10 at 8:00PM MDT by NWS Billings MT
Description: The National Weather Service in Billings has upgraded the Fire
Weather Watch to a Red Flag Warning...which is in effect from noon
to 8 PM MDT Thursday.

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

* AFFECTED AREA:
In South Central MT Fire Zones...123...124...127.

* COUNTIES AFFECTED:
In Central MT...Golden Valley...Musselshell...Wheatland.
In South Central MT...Park...Sweet Grass.
In Southwest MT...Gallatin.

* WIND: West 15 to 25 mph with gusts up to 40 mph.

* HUMIDITY: As low as 10 percent.

* TEMPERATURES: In the 80s.

* ADDITIONAL DETAILS: The worst conditions are expected across
lower elevations that have received little precipitation in the
past week.

Alert: Red Flag Warning
Area(s): Eastern Beaverhead National Forest
Effective: 2026-09-09 @ 10:59 am -> 2026-09-09 @ 7:00 pm
Onset: 2026-09-10 @ 1:00 pm -> 2026-09-10 @ 10:00 pm
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Missoula MT on 2026-09-09 @ 10:59 am
Headline: Red Flag Warning issued September 9 at 9:59AM MDT until September 10 at 9:00PM MDT by NWS Missoula MT
Description: ...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT THURSDAY DUE TO
WIND AND LOW RELATIVE HUMIDITY FOR EAST BEAVERHEAD...

The National Weather Service in Missoula MT has issued a Red Flag
Warning.

* AFFECTED AREA...Fire Weather Zone 111.

* TIMING...From noon to 9 PM MDT Thursday.

* WINDS...Southwest winds 10 to 20 mph with gusts up to 35 mph.

* RELATIVE HUMIDITY...Relative Humidity between 10 to 15 percent.

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

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