Yellowstone National Park, Wyoming

Regional Weather Alerts


     

Alert: Lake Wind Advisory
Area(s): Central and Southeast Phillips; Central and Southern Valley; Petroleum; Garfield; McCone
Effective: 2026-08-03 @ 2:01 pm -> 2026-08-03 @ 10:00 pm
Onset: 2026-08-03 @ 2:01 pm -> 2026-08-03 @ 10:00 pm
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Glasgow MT on 2026-08-03 @ 2:01 pm
Headline: Lake Wind Advisory issued August 3 at 1:01PM 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.

* WHERE...Fort Peck Lake.

* WHEN...Until 9 PM MDT this evening.

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

* ADDITIONAL DETAILS...Wave heights up to 4 ft.

Alert: Air Quality Alert
Area(s): Chouteau, MT; Glacier, MT; Hill, MT; Liberty, MT; Pondera, MT; Teton, MT; Toole, MT
Effective: 2026-08-03 @ 9:26 am -> 2026-08-04 @ 10:00 am
Onset: 2026-08-03 @ 9:26 am
Severity: Unknown
Certainty: Unknown
Urgency: Unknown
Issued By: NWS Great Falls MT on 2026-08-03 @ 9:38 am
Headline: Air Quality Alert issued August 3 at 8:26AM MDT by NWS Great Falls MT
Description: AQAMT

The Air Quality Alert for Chouteau, Glacier, Hill, Liberty, Pondera,
Teton and Toole Counties has been cancelled.

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

Alert: Air Quality Alert
Area(s): Beaverhead, MT; Deer Lodge, MT; Flathead, MT; Granite, MT; Lake, MT; Lincoln, MT; Mineral, MT; Missoula, MT; Ravalli, MT; Sanders, MT; Silver Bow, MT
Effective: 2026-08-03 @ 9:26 am -> 2026-08-04 @ 10:00 am
Onset: 2026-08-03 @ 9:26 am
Severity: Unknown
Certainty: Unknown
Urgency: Unknown
Issued By: NWS Great Falls MT on 2026-08-03 @ 9:38 am
Headline: Air Quality Alert issued August 3 at 8:26AM MDT by NWS Great Falls MT
Description: AQAMT

The Montana Department of Environmental Quality has issued an air
quality alert for Flathead, Lake, Lincoln, Beaverhead, Sanders, Deer
Lodge, Silver Bow, Granite, Mineral, Sanders, and Missoula counties
in effect until 9AM on 08/04/2026
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 6AM on 08/03/2026, particulate levels in Billings, Columbia
Falls, Frenchtown, Lewistown, Libby, Missoula and Thompson Falls are
Unhealthy.

As of 6AM on 08/03/2026, particulate levels in Butte are Unhealthy
for Sensitive Groups.

As of 6AM on 08/03/2026, particulate levels in Dillon, Great Falls,
Hamilton, Helena, Malta and Sleeping Giant are Moderate.

When air quality is Unhealthy... State and local health officials
recommend that people with respiratory or heart disease, the elderly,
and children should avoid prolonged exertion; everyone else should
limit prolonged exertion.

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: 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.