Yellowstone National Park, Wyoming

Regional Weather Alerts


     

Alert: Red Flag Warning
Area(s): Sioux Ranger District Custer National Forest
Effective: 2026-08-03 @ 3:44 am -> 2026-08-03 @ 10:00 pm
Onset: 2026-08-03 @ 4:00 am -> 2026-08-03 @ 10:00 pm
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Billings MT on 2026-08-03 @ 3:44 am
Headline: Red Flag Warning issued August 3 at 2:44AM MDT until August 3 at 9:00PM MDT by NWS Billings MT
Description: The National Weather Service in Billings has issued a Red Flag
Warning...which is in effect until 9 PM MDT this evening.

* IMPACTS: Low humidities 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: North 15 to 30 mph with gusts up to 40 mph.

* HUMIDITY: As low as 20 percent.

* TEMPERATURES: Lower 80s.

Alert: Lake Wind Advisory
Area(s): Central and Southeast Phillips; Central and Southern Valley; Petroleum; Garfield; McCone
Effective: 2026-08-02 @ 10:42 pm -> 2026-08-03 @ 3:00 pm
Onset: 2026-08-03 @ 1:00 pm -> 2026-08-03 @ 10:00 pm
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Glasgow MT on 2026-08-02 @ 10:42 pm
Headline: Lake Wind Advisory issued August 2 at 9:42PM MDT until August 3 at 9:00PM MDT by NWS Glasgow MT
Description: * WHAT...Northwest winds 15 to 25 mph with gusts up to 35 mph
expected.

* WHERE...Central and Southeast Phillips, Central and Southern
Valley, Garfield, McCone, and Petroleum Counties.

* WHEN...From noon to 9 PM MDT Monday.

* IMPACTS...Strong lake winds could produce rough waves which can
overturn or swamp small craft.

Alert: Air Quality Alert
Area(s): Chouteau, MT; Flathead, MT; Glacier, MT; Hill, MT; Lake, MT; Liberty, MT; Lincoln, MT; Pondera, MT; Sanders, MT; Teton, MT; Toole, MT
Effective: 2026-08-02 @ 10:12 am -> 2026-08-03 @ 10:00 am
Onset: 2026-08-02 @ 10:12 am
Severity: Unknown
Certainty: Unknown
Urgency: Unknown
Issued By: NWS Great Falls MT on 2026-08-02 @ 10:13 am
Headline: Air Quality Alert issued August 2 at 9:12AM MDT by NWS Great Falls MT
Description: AQAMT

The Montana Department of Environmental Quality has issued an air
quality alert for Chouteau, Flathead, Glacier, Hill, Lake, Liberty,
Lincoln, Pondera, Sanders, Teton, Toole counties in effect until 9AM
on 08/03/2026
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 08/02/2026, particulate levels in Libby are Unhealthy
for Sensitive Groups.

As of 7AM on 08/02/2026, particulate levels in Billings, Butte, Cut
Bank, Dillon, Frenchtown, Great Falls, Hamilton, Havre, Helena,
Lewistown, Malta, Missoula and Sleeping Giant 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: Air Quality Alert
Area(s): Beaverhead, MT; Blaine, MT; Broadwater, MT; Cascade, MT; Deer Lodge, MT; Fergus, MT; Granite, MT; Jefferson, MT; Judith Basin, MT; Lewis and Clark, MT; Meagher, MT; Mineral, MT; Missoula, MT; Petroleum, MT; Phillips, MT; Powell, MT; Ravalli, MT; Silver Bow, MT
Effective: 2026-08-02 @ 10:12 am -> 2026-08-03 @ 10:00 am
Onset: 2026-08-02 @ 10:12 am
Severity: Unknown
Certainty: Unknown
Urgency: Unknown
Issued By: NWS Great Falls MT on 2026-08-02 @ 10:13 am
Headline: Air Quality Alert issued August 2 at 9:12AM MDT by NWS Great Falls MT
Description: AQAMT

The Air Quality Alert for Beaverhead, Blaine, Broadwater, Cascade,
Deer Lodge, Fergus, Granite, Jefferson, Judith Basin, Lewis and
Clark, Meagher, Mineral, Missoula, Petroleum, Phillips, Powell,
Ravalli and Silver Bow Counties has been cancelled.

For more information visit the Montana Department of Environmental
Quality at www.todaysair.mt.gov