Yellowstone National Park, Wyoming
Regional Weather Alerts
| Alert: | Winter Weather Advisory |
| Area(s): | Hill County; Northern Blaine County |
| Effective: | 2026-10-12 @ 12:30 am -> 2026-10-12 @ 10:00 am |
| Onset: | 2026-10-12 @ 12:30 am -> 2026-10-12 @ 10:00 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-10-12 @ 12:30 am |
| Headline: | Winter Weather Advisory issued October 11 at 11:30PM MDT until October 12 at 9:00AM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Wet snow. Additional snow accumulations up to two inches. * WHERE...Hill County and Northern Blaine County. * WHEN...Until 9 AM MDT Monday. * IMPACTS...Plan on slippery road conditions. |
| Alert: | Winter Storm Warning |
| Area(s): | Helena Valley; Missouri Headwaters; Madison River Valley; Gallatin Valley |
| Effective: | 2026-10-12 @ 12:30 am -> 2026-10-12 @ 7:00 am |
| Onset: | 2026-10-12 @ 12:30 am -> 2026-10-12 @ 7:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-10-12 @ 12:30 am |
| Headline: | Winter Storm Warning issued October 11 at 11:30PM MDT until October 12 at 6:00AM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Heavy snow. Additional snow accumulations up to two inches. Winds gusting as high as 40 mph. * WHERE...Helena Valley, Gallatin Valley, Madison River Valley, and Missouri Headwaters. * WHEN...Until 6 AM MDT Monday. * IMPACTS...Travel could be very difficult. The wet and heavy nature of the snow could bring down tree branches. Isolated power outages are possible. |
| Alert: | Winter Weather Advisory |
| Area(s): | Eastern Glacier, Western Toole, and Central Pondera; Eastern Toole and Liberty; Western and Central Chouteau County; Bears Paw Mountains and Southern Blaine |
| Effective: | 2026-10-12 @ 12:30 am -> 2026-10-12 @ 7:00 am |
| Onset: | 2026-10-12 @ 12:30 am -> 2026-10-12 @ 7:00 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-10-12 @ 12:30 am |
| Headline: | Winter Weather Advisory issued October 11 at 11:30PM MDT until October 12 at 6:00AM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Snow. Additional snow accumulations up to 2 inches. * WHERE...Bears Paw Mountains and Southern Blaine, Eastern Glacier, Western Toole, and Central Pondera, Eastern Toole and Liberty, and Western and Central Chouteau County. * WHEN...Until 6 AM MDT Monday. * IMPACTS...Plan on slippery road conditions. |
| Alert: | Winter Storm Warning |
| Area(s): | East Glacier Park Region; Northern High Plains; Southern Rocky Mountain Front; Southern High Plains; Upper Blackfoot and MacDonald Pass; Gates of the Mountains |
| Effective: | 2026-10-12 @ 12:30 am -> 2026-10-12 @ 7:00 am |
| Onset: | 2026-10-12 @ 12:30 am -> 2026-10-12 @ 7:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-10-12 @ 12:30 am |
| Headline: | Winter Storm Warning issued October 11 at 11:30PM MDT until October 12 at 6:00AM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Heavy snow. Additional snow accumulations up to 3 inches. Winds gusting as high as 35 mph. * WHERE...Portions of central and north central Montana. * WHEN...Until 6 AM MDT Monday. * IMPACTS...Travel could be very difficult. The wet and heavy nature of the snow could bring down tree branches. Isolated power outages are possible. |
| Alert: | Winter Storm Warning |
| Area(s): | Eastern Pondera and Eastern Teton; Cascade County below 5000ft; Judith Basin County and Judith Gap; Fergus County below 4500ft; Meagher County Valleys |
| Effective: | 2026-10-12 @ 12:30 am -> 2026-10-12 @ 7:00 am |
| Onset: | 2026-10-12 @ 12:30 am -> 2026-10-12 @ 7:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-10-12 @ 12:30 am |
| Headline: | Winter Storm Warning issued October 11 at 11:30PM MDT until October 12 at 6:00AM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Heavy snow. Additional snow accumulations up to 3 inches. * WHERE...Meagher County Valleys, Cascade County below 5000ft, Eastern Pondera and Eastern Teton, Fergus County below 4500ft, and Judith Basin County and Judith Gap. * WHEN...Until 6 AM MDT Monday. * IMPACTS...Travel could be very difficult. The wet and heavy nature of the snow could bring down tree branches. Isolated power outages are possible. |
| Alert: | Winter Storm Warning |
| Area(s): | Little Belt and Highwood Mountains; Snowy and Judith Mountains; Elkhorn and Boulder Mountains |
| Effective: | 2026-10-12 @ 12:30 am -> 2026-10-12 @ 7:00 am |
| Onset: | 2026-10-12 @ 12:30 am -> 2026-10-12 @ 7:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-10-12 @ 12:30 am |
| Headline: | Winter Storm Warning issued October 11 at 11:30PM MDT until October 12 at 6:00AM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Heavy snow. Additional snow accumulations up to 3 inches. * WHERE...Elkhorn and Boulder Mountains, Little Belt and Highwood Mountains, and Snowy and Judith Mountains. * WHEN...Until 6 AM MDT Monday. * IMPACTS...Travel could be very difficult. The wet and heavy nature of the snow could bring down tree branches. Isolated power outages are possible. |
| Alert: | Winter Weather Advisory |
| Area(s): | Canyon Ferry Area; Northwest Beaverhead County; Beaverhead and Western Madison below 6000ft; Ruby Mountains and Southern Beaverhead Mountains; Gallatin and Madison County Mountains and Centennial Mountains |
| Effective: | 2026-10-12 @ 12:30 am -> 2026-10-12 @ 7:00 am |
| Onset: | 2026-10-12 @ 12:30 am -> 2026-10-12 @ 7:00 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-10-12 @ 12:30 am |
| Headline: | Winter Weather Advisory issued October 11 at 11:30PM MDT until October 12 at 6:00AM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Snow. Additional snow accumulations up to two inches. * WHERE...Canyon Ferry Area, Beaverhead and Western Madison below 6000ft, Gallatin and Madison County Mountains and Centennial Mountains, Northwest Beaverhead County, and Ruby Mountains and Southern Beaverhead Mountains. * WHEN...Until 6 AM MDT Monday. * IMPACTS...Plan on slippery road conditions. |
| Alert: | Winter Storm Warning |
| Area(s): | Big Belt, Bridger and Castle Mountains |
| Effective: | 2026-10-12 @ 12:30 am -> 2026-10-12 @ 7:00 am |
| Onset: | 2026-10-12 @ 12:30 am -> 2026-10-12 @ 7:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-10-12 @ 12:30 am |
| Headline: | Winter Storm Warning issued October 11 at 11:30PM MDT until October 12 at 6:00AM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Heavy snow. Additional snow accumulations up to two inches. * WHERE...Big Belt, Bridger and Castle Mountains. * WHEN...Until 6 AM MDT Monday. * IMPACTS...Travel could be very difficult. The wet and heavy nature of the snow could bring down tree branches. Isolated power outages are possible. |
| Alert: | Winter Storm Warning |
| Area(s): | Judith Gap |
| Effective: | 2026-10-11 @ 1:25 pm -> 2026-10-12 @ 1:00 pm |
| Onset: | 2026-10-11 @ 1:25 pm -> 2026-10-12 @ 1:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2026-10-11 @ 1:25 pm |
| Headline: | Winter Storm Warning issued October 11 at 12:25PM MDT until October 12 at 12:00PM MDT by NWS Billings MT |
| Description: |
* WHAT...Heavy snow occurring. Additional snow accumulations between 3 and 5 inches. Winds gusting as high as 30 mph. * WHERE...Judith Gap. * WHEN...Until noon MDT Monday. * IMPACTS...Travel could be very difficult. Areas of blowing snow could significantly reduce visibility. The hazardous conditions will impact the Monday morning commute. |
| Alert: | Winter Weather Advisory |
| Area(s): | Northern Park; Livingston Area; Beartooth Foothills; Northern Sweet Grass; Southern Wheatland |
| Effective: | 2026-10-11 @ 1:25 pm -> 2026-10-12 @ 1:00 pm |
| Onset: | 2026-10-11 @ 1:25 pm -> 2026-10-12 @ 1:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2026-10-11 @ 1:25 pm |
| Headline: | Winter Weather Advisory issued October 11 at 12:25PM MDT until October 12 at 12:00PM MDT by NWS Billings MT |
| Description: |
* WHAT...Wet snow occurring. Additional snow accumulations between 1 and 3 inches. Winds gusting as high as 35 mph. * WHERE...Southern Wheatland, Beartooth Foothills, Livingston Area, Northern Park, and Northern Sweet Grass. * WHEN...Until noon MDT Monday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions will impact the Monday morning commute. |
| Alert: | Winter Weather Advisory |
| Area(s): | Musselshell; Northern Stillwater; Golden Valley |
| Effective: | 2026-10-11 @ 1:25 pm -> 2026-10-12 @ 1:00 pm |
| Onset: | 2026-10-11 @ 7:00 pm -> 2026-10-12 @ 1:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2026-10-11 @ 1:25 pm |
| Headline: | Winter Weather Advisory issued October 11 at 12:25PM MDT until October 12 at 12:00PM MDT by NWS Billings MT |
| Description: |
* WHAT...Wet snow expected. Total snow accumulations up to two inches. Winds gusting as high as 30 mph. * WHERE...Golden Valley, Musselshell, and Northern Stillwater. * WHEN...From 6 PM this evening to noon MDT Monday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions will impact the Monday morning commute. |
| Alert: | Winter Storm Warning |
| Area(s): | Melville Foothills |
| Effective: | 2026-10-11 @ 1:25 pm -> 2026-10-12 @ 1:00 pm |
| Onset: | 2026-10-11 @ 1:25 pm -> 2026-10-12 @ 1:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2026-10-11 @ 1:25 pm |
| Headline: | Winter Storm Warning issued October 11 at 12:25PM MDT until October 12 at 12:00PM MDT by NWS Billings MT |
| Description: |
* WHAT...Heavy wet snow occurring. Additional snow accumulations between 3 and 5 inches. Winds gusting as high as 30 mph. * WHERE...Melville Foothills. * WHEN...Until noon MDT Monday. * IMPACTS...Travel could be very difficult. The hazardous conditions will impact the Monday morning commute. Recreation in the high country will be impacted by heavy accumulating snow. |
| Alert: | Winter Storm Warning |
| Area(s): | Absaroka/Beartooth Mountains; Crazy Mountains |
| Effective: | 2026-10-11 @ 1:25 pm -> 2026-10-12 @ 1:00 pm |
| Onset: | 2026-10-11 @ 1:25 pm -> 2026-10-12 @ 1:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2026-10-11 @ 1:25 pm |
| Headline: | Winter Storm Warning issued October 11 at 12:25PM MDT until October 12 at 12:00PM MDT by NWS Billings MT |
| Description: |
* WHAT...Heavy snow occurring. Additional snow accumulations between 1 and 6 inches. Winds gusting as high as 30 mph. * WHERE...Absaroka/Beartooth Mountains and Crazy Mountains. * WHEN...Until noon MDT Monday. * IMPACTS...Plan on slippery road conditions. Recreation in the high country will be impacted by heavy accumulating snow. |
| Alert: | Winter Weather Advisory |
| Area(s): | Northern Phillips; Northern Valley |
| Effective: | 2026-10-11 @ 1:06 pm -> 2026-10-12 @ 7:00 am |
| Onset: | 2026-10-11 @ 7:00 pm -> 2026-10-12 @ 1:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2026-10-11 @ 1:06 pm |
| Headline: | Winter Weather Advisory issued October 11 at 12:06PM MDT until October 12 at 12:00PM MDT by NWS Glasgow MT |
| Description: |
* WHAT...Wet snow expected. Total snow accumulations between 1 and 3 inches. * WHERE...Northern Phillips and Northern Valley Counties. * WHEN...From 6 PM this evening to noon MDT Monday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions will impact the Monday morning commute. |
| Alert: | Winter Weather Advisory |
| Area(s): | Southwest Phillips |
| Effective: | 2026-10-11 @ 1:06 pm -> 2026-10-12 @ 7:00 am |
| Onset: | 2026-10-11 @ 1:06 pm -> 2026-10-12 @ 1:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2026-10-11 @ 1:06 pm |
| Headline: | Winter Weather Advisory issued October 11 at 12:06PM MDT until October 12 at 12:00PM MDT by NWS Glasgow MT |
| Description: |
* WHAT...Wet snow. Additional snow accumulations up to 6 inches. * WHERE...Southwest Phillips County. * WHEN...Until noon MDT Monday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions will impact the Monday morning commute. |
| Alert: | Lake Wind Advisory |
| Area(s): | Flathead/Mission Valleys |
| Effective: | 2026-10-11 @ 11:36 am -> 2026-10-12 @ 7:00 am |
| Onset: | 2026-10-11 @ 11:36 am -> 2026-10-12 @ 7:00 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Missoula MT on 2026-10-11 @ 11:36 am |
| Headline: | Lake Wind Advisory issued October 11 at 10:36AM MDT until October 12 at 6:00AM MDT by NWS Missoula MT |
| Description: |
* WHAT...Wind Advisory canceled and turned into a Lake Wind Advisory as impacts become focused on Flathead Lake, rather than a larger area. Northeast to east winds 10 to 20 mph with gusts up to 35 mph. Localized gusts of 45 to 50 mph on the east side of Flathead Lake. * WHERE...Flathead Lake. * WHEN...Until 6 AM MDT Monday. * IMPACTS...Strong winds and rough waves on area lakes will create hazardous conditions for small craft. Localized tree damage and power outages are still possible. |
| Alert: | Winter Weather Advisory |
| Area(s): | Bitterroot/Sapphire Mountains; Potomac/Seeley Lake Region |
| Effective: | 2026-10-10 @ 12:42 pm -> 2026-10-12 @ 7:00 am |
| Onset: | 2026-10-10 @ 7:00 pm -> 2026-10-12 @ 7:00 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Missoula MT on 2026-10-10 @ 12:42 pm |
| Headline: | Winter Weather Advisory issued October 10 at 11:42AM MDT until October 12 at 6:00AM MDT by NWS Missoula MT |
| Description: |
* WHAT...Snow expected. Total snow accumulations between 2 and 6 inches, locally higher totals of 8 to 10 inches in the mountains. Winds gusting as high as 40 mph. * WHERE...I-90 East Missoula to Bearmouth, Highway 93 Sula to Lost Trail Pass, Highway 83 Seeley Lake to Condon, Lolo Pass, and Highway 200 Bonner to Greenough. * WHEN...From 6 PM this evening to 6 AM MDT Monday. * IMPACTS...Plan on slippery road conditions. |
| Alert: | Winter Storm Warning |
| Area(s): | Butte/Blackfoot Region |
| Effective: | 2026-10-10 @ 12:42 pm -> 2026-10-12 @ 7:00 am |
| Onset: | 2026-10-10 @ 7:00 pm -> 2026-10-12 @ 7:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Missoula MT on 2026-10-10 @ 12:42 pm |
| Headline: | Winter Storm Warning issued October 10 at 11:42AM MDT until October 12 at 6:00AM MDT by NWS Missoula MT |
| Description: |
* WHAT...Heavy snow expected. Total snow accumulations between 3 and 9 inches. Snow totals of 12-18 inches in the higher mountain areas. Winds gusting as high as 45 mph. * WHERE...MacDonald Pass, Homestake Pass, Highway 12 Garrison to Elliston, Georgetown Lake, and Butte. * WHEN...From 6 PM this evening to 6 AM MDT Monday. * IMPACTS...Travel could be very difficult. |
| Alert: | Winter Weather Advisory |
| Area(s): | West Glacier Region |
| Effective: | 2026-10-10 @ 12:42 pm -> 2026-10-12 @ 7:00 am |
| Onset: | 2026-10-10 @ 7:00 pm -> 2026-10-12 @ 7:00 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Missoula MT on 2026-10-10 @ 12:42 pm |
| Headline: | Winter Weather Advisory issued October 10 at 11:42AM MDT until October 12 at 6:00AM MDT by NWS Missoula MT |
| Description: |
* WHAT...Snow expected. Total snow accumulations between 1 and 3 inches, with higher amounts above valley floors and in Glacier National Park. Winds gusting as high as 45 mph. * WHERE...Essex, Polebridge, Bad Rock Canyon, Glacier National Park, Highway 83 Bigfork to Swan Lake, and Marias Pass. * WHEN...From 6 PM this evening to 6 AM MDT Monday. * IMPACTS...Plan on slippery road conditions. |
