Yellowstone National Park, Wyoming

Regional Weather Alerts


     

Alert: Winter Storm Watch
Area(s): Absaroka/Beartooth Mountains
Effective: 2026-04-21 @ 3:55 pm -> 2026-04-24 @ 7:00 am
Onset: 2026-04-22 @ 7:00 pm -> 2026-04-22 @ 4:00 pm
Severity: Severe
Certainty: Possible
Urgency: Future
Issued By: NWS Billings MT on 2026-04-21 @ 3:55 pm
Headline: Winter Storm Watch issued April 21 at 2:55PM MDT until April 24 at 6:00AM MDT by NWS Billings MT
Description: * WHAT...Heavy snow possible. Total snow accumulations between 8 and
15 inches possible. Winds could gust as high as 60 mph.

* WHERE...Absaroka/Beartooth Mountains.

* WHEN...From Wednesday evening through late Thursday night.

* IMPACTS...Recreation in the high country could be impacted by heavy
accumulating snow. Blowing snow could significantly reduce
visibility.

* ADDITIONAL DETAILS...The strongest winds are forecast Wednesday
evening east of the Stillwater River Valley.

Alert: High Wind Warning
Area(s): Madison River Valley
Effective: 2026-04-21 @ 3:26 pm -> 2026-04-22 @ 7:00 pm
Onset: 2026-04-22 @ 4:00 am -> 2026-04-22 @ 7:00 am
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Great Falls MT on 2026-04-21 @ 3:26 pm
Headline: High Wind Warning issued April 21 at 2:26PM MDT until April 22 at 6:00PM MDT by NWS Great Falls MT
Description: * WHAT...Southerly winds 35 to 45 mph with gusts up to 65 mph
expected.

* WHERE...Madison River Valley.

* WHEN...From 3 AM to 6 PM MDT Wednesday.

* IMPACTS...High winds may move loose debris, damage property and
cause power outages. Travel could be difficult, especially for
high profile vehicles.

Alert: High Wind Watch
Area(s): Eastern Toole and Liberty; Hill County; Northern Blaine County; Western and Central Chouteau County; Bears Paw Mountains and Southern Blaine; Fergus County below 4500ft
Effective: 2026-04-21 @ 3:26 pm -> 2026-04-23 @ 7:00 pm
Onset: 2026-04-23 @ 1:00 am -> 2026-04-22 @ 7:00 am
Severity: Severe
Certainty: Possible
Urgency: Future
Issued By: NWS Great Falls MT on 2026-04-21 @ 3:26 pm
Headline: High Wind Watch issued April 21 at 2:26PM MDT until April 23 at 6:00PM MDT by NWS Great Falls MT
Description: * WHAT...Northwesterly winds 30 to 40 mph with gusts up to 65 mph
possible.

* WHERE...Eastern Toole and Liberty Counties, Hill County, Northern
Blaine County, Western and Central Chouteau County, Bears Paw
Mountains and Southern Blaine, and Fergus County below 4500ft.

* WHEN...From late Wednesday night through Thursday afternoon.

* IMPACTS...High winds may move loose debris, damage property and
cause power outages. Travel could be difficult, especially for
high profile vehicles.

Alert: Winter Storm Watch
Area(s): Judith Basin County and Judith Gap; Fergus County below 4500ft; Snowy and Judith Mountains
Effective: 2026-04-21 @ 3:20 pm -> 2026-04-23 @ 7:00 pm
Onset: 2026-04-23 @ 1:00 am -> 2026-04-22 @ 7:15 am
Severity: Severe
Certainty: Possible
Urgency: Future
Issued By: NWS Great Falls MT on 2026-04-21 @ 3:20 pm
Headline: Winter Storm Watch issued April 21 at 2:20PM MDT until April 23 at 6:00PM MDT by NWS Great Falls MT
Description: * WHAT...Heavy snow possible. Total snow accumulations of 2 to 8
inches, with isolated higher amounts possible. Winds could gust
over 50 mph.

* WHERE...Snowy and Judith Mountains, Fergus County below 4500ft,
and Judith Basin County and Judith Gap.

* WHEN...From late Wednesday night through Thursday afternoon.

* IMPACTS...Plan for difficult driving conditions due to slush or
snow covered roadways. Falling and or blowing snow may
significantly reduce visibility below a quarter mile at times.

* ADDITIONAL DETAILS...The heavy, wet snow may cause instances of
power outages and or tree damage.

Alert: Winter Weather Advisory
Area(s): East Glacier Park Region; Northern High Plains
Effective: 2026-04-21 @ 3:20 pm -> 2026-04-23 @ 7:00 pm
Onset: 2026-04-22 @ 7:00 pm -> 2026-04-22 @ 7:15 am
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Great Falls MT on 2026-04-21 @ 3:20 pm
Headline: Winter Weather Advisory issued April 21 at 2:20PM MDT until April 23 at 6:00PM MDT by NWS Great Falls MT
Description: * WHAT...Wet snow expected. Total snow accumulations up to 3 inches
over the plains and between 2 and 6 inches at Marias Pass.
Accumulations will be in excess of 6 inches over the higher
terrain of Glacier National Park. Winds gusting as high as 45 mph.

* WHERE...Eastern Glacier National Park and adjacent foothills and
plains.

* WHEN...From 6 PM Wednesday to 6 PM MDT Thursday.

* IMPACTS...Expect difficult driving conditions due to slush or snow
covered roadways. Falling and or blowing snow may significantly
reduce visibility at times. Tire chains may be required for some
vehicles if traveling through mountain passes. Those with outdoor
plans should be prepared for dangerous outdoor conditions.

Alert: Winter Weather Advisory
Area(s): Bears Paw Mountains and Southern Blaine
Effective: 2026-04-21 @ 3:20 pm -> 2026-04-23 @ 7:00 pm
Onset: 2026-04-23 @ 1:00 am -> 2026-04-22 @ 7:15 am
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Great Falls MT on 2026-04-21 @ 3:20 pm
Headline: Winter Weather Advisory issued April 21 at 2:20PM MDT until April 23 at 6:00PM MDT by NWS Great Falls MT
Description: * WHAT...wet snow expected. Total snow accumulations between 2 and 6
inches over the Bears Paw Mountains. Winds gusting over 50 mph at
times.

* WHERE...Bears Paw Mountains and Southern Blaine.

* WHEN...From midnight Wednesday Night to 6 PM MDT Thursday.

* IMPACTS...Expect difficult driving conditions due to slush or snow
covered roadways. Falling and or blowing snow may significantly
reduce visibility at times.

* ADDITIONAL DETAILS...The wet snow may cause instances of power
outages and or tree damage.

Alert: Winter Storm Watch
Area(s): Little Belt and Highwood Mountains; Big Belt, Bridger and Castle Mountains; Gallatin and Madison County Mountains and Centennial Mountains
Effective: 2026-04-21 @ 3:20 pm -> 2026-04-23 @ 7:00 pm
Onset: 2026-04-22 @ 7:00 pm -> 2026-04-22 @ 7:15 am
Severity: Severe
Certainty: Possible
Urgency: Future
Issued By: NWS Great Falls MT on 2026-04-21 @ 3:20 pm
Headline: Winter Storm Watch issued April 21 at 2:20PM MDT until April 23 at 6:00PM MDT by NWS Great Falls MT
Description: * WHAT...Heavy, wet snow possible. Total snow accumulations between
5 and 11 inches, with higher amounts over the mountain peaks.
Winds could gust as high as 50 mph, highest for northern areas.

* WHERE...Big Belt, Bridger and Castle Mountains, Little Belt and
Highwood Mountains, and Gallatin and Madison County Mountains and
Centennial Mountains.

* WHEN...From Wednesday evening through Thursday afternoon.

* IMPACTS...Expect difficult driving conditions due to slush or snow
covered roadways. Falling and or blowing snow may significantly
reduce visibility below a quarter mile at times. Tire chains may
be required for some vehicles if traveling through mountain
passes. Those with outdoor plans should be prepared for dangerous
outdoor conditions.

* ADDITIONAL DETAILS...The heavy, wet snow may cause instances of
power outages and or tree damage.

Alert: Winter Storm Watch
Area(s): Gallatin Valley
Effective: 2026-04-21 @ 3:20 pm -> 2026-04-24 @ 1:00 pm
Onset: 2026-04-23 @ 7:00 pm -> 2026-04-22 @ 7:15 am
Severity: Severe
Certainty: Possible
Urgency: Future
Issued By: NWS Great Falls MT on 2026-04-21 @ 3:20 pm
Headline: Winter Storm Watch issued April 21 at 2:20PM MDT until April 24 at 12:00PM MDT by NWS Great Falls MT
Description: * WHAT...Heavy, wet snow possible. Total snow accumulations between
2 and 8 inches possible, highest over the south and east portions
of the Gallatin Valley.

* WHERE...Gallatin Valley.

* WHEN...From Thursday evening through Friday morning.

* IMPACTS...Expect difficult driving conditions due to slush or snow
covered roadways. The hazardous conditions could impact the
Thursday evening and Friday morning commutes.

* ADDITIONAL DETAILS...The heavy, wet snow may cause instances of
power outages and or tree damage.

Alert: Winter Weather Advisory
Area(s): Southern Rocky Mountain Front; Upper Blackfoot and MacDonald Pass; Gates of the Mountains; Elkhorn and Boulder Mountains; Northwest Beaverhead County; Ruby Mountains and Southern Beaverhead Mountains
Effective: 2026-04-21 @ 3:20 pm -> 2026-04-24 @ 1:00 pm
Onset: 2026-04-22 @ 7:00 pm -> 2026-04-22 @ 7:15 am
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Great Falls MT on 2026-04-21 @ 3:20 pm
Headline: Winter Weather Advisory issued April 21 at 2:20PM MDT until April 24 at 12:00PM MDT by NWS Great Falls MT
Description: * WHAT...Wet snow expected. Total snow accumulations between 3 and 8
inches. Winds gusting as high as 40 mph.

* WHERE...Portions of central, north central, and southwest Montana.

* WHEN...From 6 PM Wednesday to noon MDT Friday.

* IMPACTS...Expect difficult driving conditions due to slush or snow
covered roadways. Falling and or blowing snow may significantly
reduce visibility at times. Tire chains may be required for some
vehicles if traveling through mountain passes. Those with outdoor
plans should be prepared for dangerous outdoor conditions.

* ADDITIONAL DETAILS...The wet snow may cause isolated instances of
power outages and or tree damage.

Alert: Winter Weather Advisory
Area(s): Potomac/Seeley Lake Region
Effective: 2026-04-21 @ 2:50 pm -> 2026-04-24 @ 1:00 pm
Onset: 2026-04-22 @ 7:00 pm -> 2026-04-24 @ 1:00 pm
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Missoula MT on 2026-04-21 @ 2:50 pm
Headline: Winter Weather Advisory issued April 21 at 1:50PM MDT until April 24 at 12:00PM MDT by NWS Missoula MT
Description: * WHAT...Snow expected. There is a likelihood of moderate to
isolated major winter weather impacts. Total snow accumulations of
2 and 4 inches in the valleys and 6 to 12 inches in the mountains.

* WHERE...Highway 200 Bonner to Greenough, I-90 East Missoula to
Bearmouth, and Highway 83 Seeley Lake to Condon.

* WHEN...From 6 PM Wednesday to noon MDT Friday.

* IMPACTS...For MODERATE winter weather impacts, expect disruptions
to normal activities. Hazardous traveling conditions. Use extra
caution while driving. Closures and disruptions to infrastructure
may occur. For MAJOR winter weather impacts, expect considerable
disruptions to normal activities. Dangerous or impossible
traveling conditions. Avoid travel in the impacted areas if
possible. Widespread closures and disruptions to infrastructure
may occur. The hazardous conditions could impact the Thursday
morning and evening commutes, especially over higher passes.

* ADDITIONAL DETAILS...The most impactful snow accumulations are
most likely to occur Thursday evening through Friday morning.

Alert: Winter Weather Advisory
Area(s): Bitterroot/Sapphire Mountains
Effective: 2026-04-21 @ 2:50 pm -> 2026-04-24 @ 1:00 pm
Onset: 2026-04-22 @ 7:00 pm -> 2026-04-24 @ 1:00 pm
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Missoula MT on 2026-04-21 @ 2:50 pm
Headline: Winter Weather Advisory issued April 21 at 1:50PM MDT until April 24 at 12:00PM MDT by NWS Missoula MT
Description: * WHAT...Snow expected. There is a likelihood of moderate winter
weather impacts. Total snow accumulations of 1 to 5 inches below
4000 feet, 6 to 10 inches at pass level and over 12 inches in the
high terrain.

* WHERE...Highway 93 Sula to Lost Trail Pass and Lolo Pass.

* WHEN...From 6 PM Wednesday to noon MDT Friday.

* IMPACTS...For MODERATE winter weather impacts, expect disruptions
to normal activities. Hazardous traveling conditions. Use extra
caution while driving. Closures and disruptions to infrastructure
may occur. The hazardous conditions could impact the Thursday
morning and evening commutes, especially over higher passes.

Alert: Winter Weather Advisory
Area(s): Butte/Blackfoot Region
Effective: 2026-04-21 @ 2:50 pm -> 2026-04-24 @ 1:00 pm
Onset: 2026-04-22 @ 7:00 pm -> 2026-04-24 @ 1:00 pm
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Missoula MT on 2026-04-21 @ 2:50 pm
Headline: Winter Weather Advisory issued April 21 at 1:50PM MDT until April 24 at 12:00PM MDT by NWS Missoula MT
Description: * WHAT...Snow expected. There is a likelihood of moderate to
isolated major winter weather impacts. Total snow accumulations of
2 and 5 inches in the valleys, 5 to 10 inches at pass level, and
over 12 inches in the high terrain. Winds gusting as high as 35
mph.

* WHERE...Georgetown Lake, Butte, Highway 12 Garrison to Elliston,
MacDonald Pass, and Homestake Pass.

* WHEN...From 6 PM Wednesday to noon MDT Friday.

* IMPACTS...For MODERATE winter weather impacts, expect disruptions
to normal activities. Hazardous traveling conditions. Use extra
caution while driving. Closures and disruptions to infrastructure
may occur. For MAJOR winter weather impacts, expect considerable
disruptions to normal activities. Dangerous or impossible
traveling conditions. Avoid travel in the impacted areas if
possible. Widespread closures and disruptions to infrastructure
may occur. The hazardous conditions could impact the Thursday
morning and evening commutes, especially over higher passes.

* ADDITIONAL DETAILS...The most impactful snow accumulations are
most likely to occur Thursday evening through Friday morning.

Alert: Winter Weather Advisory
Area(s): West Glacier Region
Effective: 2026-04-21 @ 2:50 pm -> 2026-04-23 @ 7:00 pm
Onset: 2026-04-22 @ 7:00 pm -> 2026-04-23 @ 7:00 pm
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Missoula MT on 2026-04-21 @ 2:50 pm
Headline: Winter Weather Advisory issued April 21 at 1:50PM MDT until April 23 at 6:00PM MDT by NWS Missoula MT
Description: * WHAT...Snow expected. There is a likelihood of moderate winter
weather impacts. Total snow accumulations of 1 to 3 inches below
4000 feet, 4 to 7 inches at pass level and over 10 inches in the
high terrain.

* WHERE...Glacier National Park, Marias Pass, Bad Rock Canyon,
Essex, Highway 83 Bigfork to Swan Lake, and Polebridge.

* WHEN...From 6 PM Wednesday to 6 PM MDT Thursday.

* IMPACTS...For MODERATE winter weather impacts, expect disruptions
to normal activities. Hazardous traveling conditions. Use extra
caution while driving. Closures and disruptions to infrastructure
may occur. The hazardous conditions could impact the Thursday
morning and evening commutes, especially over higher passes.

Alert: High Wind Watch
Area(s): Daniels; Sheridan; Western Roosevelt; McCone; Richland; Dawson; Prairie; Wibaux; Eastern Roosevelt
Effective: 2026-04-21 @ 2:46 pm -> 2026-04-24 @ 1:00 am
Onset: 2026-04-23 @ 7:00 am -> 2026-04-22 @ 7:15 am
Severity: Severe
Certainty: Possible
Urgency: Future
Issued By: NWS Glasgow MT on 2026-04-21 @ 2:46 pm
Headline: High Wind Watch issued April 21 at 1:46PM MDT until April 24 at 12:00AM MDT by NWS Glasgow MT
Description: * WHAT...Northwest winds 30 to 40 mph with gusts up to 60 mph
possible.

* WHERE...Daniels, Dawson, Roosevelt, McCone, Prairie, Richland,
Sheridan and Wibaux Counties.

* WHEN...From Thursday morning through Thursday evening.

* IMPACTS...High winds may move loose debris, damage property, and
cause power bumps. Travel could be difficult, especially for high
profile vehicles.

* ADDITIONAL DETAILS...These winds will make for hazardous
conditions on area lakes.

Alert: High Wind Watch
Area(s): Central and Southeast Phillips; Central and Southern Valley; Petroleum; Garfield; Northern Phillips; Southwest Phillips; Northern Valley
Effective: 2026-04-21 @ 2:46 pm -> 2026-04-23 @ 7:00 pm
Onset: 2026-04-23 @ 1:00 am -> 2026-04-22 @ 7:15 am
Severity: Severe
Certainty: Possible
Urgency: Future
Issued By: NWS Glasgow MT on 2026-04-21 @ 2:46 pm
Headline: High Wind Watch issued April 21 at 1:46PM MDT until April 23 at 6:00PM MDT by NWS Glasgow MT
Description: * WHAT...Northwest winds 30 to 40 mph with gusts up to 60 mph
possible.

* WHERE...Phillips, Valley, Garfield, Petroleum Counties.

* WHEN...From late Wednesday night through Thursday afternoon.

* IMPACTS...High winds may move loose debris, damage property, and
cause power bumps. Travel could be difficult, especially for high
profile vehicles.

* ADDITIONAL DETAILS...These winds will make for hazardous
conditions on area lakes.

Alert: Fire Weather Watch
Area(s): Dawson/McCone/Prairie/Richland/Wibaux Counties
Effective: 2026-04-21 @ 2:15 pm -> 2026-04-22 @ 8:00 pm
Onset: 2026-04-22 @ 8:00 am -> 2026-04-22 @ 7:00 am
Severity: Severe
Certainty: Possible
Urgency: Future
Issued By: NWS Glasgow MT on 2026-04-21 @ 2:15 pm
Headline: Fire Weather Watch issued April 21 at 1:15PM MDT until April 22 at 7:00PM MDT by NWS Glasgow MT
Description: The National Weather Service in Glasgow has issued a Fire Weather
Watch, which is in effect from Wednesday morning through
Wednesday evening.

* AFFECTED AREA...Fire weather zone 122.

* WIND...South then southwest increasing to 20 to 30 mph.

* HUMIDITY...as low as 10 to 15 percent.

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

Alert: Fire Weather Watch
Area(s): Fort Peck Reservation and Daniels/Roosevelt/Sheridan Counties; Northern Valley and Northern Phillips Counties; The Little Rockies; The Lower Missouri River Breaks including the Charles M Russell National Wildlife Refuge; Southern Petroleum and Southern Garfield Counties
Effective: 2026-04-21 @ 2:15 pm -> 2026-04-22 @ 8:00 pm
Onset: 2026-04-22 @ 1:00 pm -> 2026-04-22 @ 7:00 am
Severity: Severe
Certainty: Possible
Urgency: Future
Issued By: NWS Glasgow MT on 2026-04-21 @ 2:15 pm
Headline: Fire Weather Watch issued April 21 at 1:15PM MDT until April 22 at 7:00PM MDT by NWS Glasgow MT
Description: The National Weather Service in Glasgow has issued a Fire Weather
Watch, which is in effect from Wednesday afternoon through
Wednesday evening.

* AFFECTED AREA...Fire weather zones 120, 134, 135, 136, and
137.

* WIND...Southwest then west at 20 to 30 mph.

* HUMIDITY...Near 20 percent near the Canadian border to 10 to 15
percent south of Fort Peck Lake.

* HIGHEST THREAT...Along and south of Highway 2.

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