Yellowstone National Park, Wyoming
Regional Weather Alerts
| Alert: | Winter Storm Warning |
| Area(s): | Melville Foothills |
| Effective: | 2026-10-11 @ 1:57 am -> 2026-10-12 @ 2:00 am |
| Onset: | 2026-10-11 @ 1:57 am -> 2026-10-12 @ 1:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2026-10-11 @ 1:57 am |
| Headline: | Winter Storm Warning issued October 11 at 12:57AM MDT until October 12 at 12:00PM MDT by NWS Billings MT |
| Description: |
* WHAT...Periods of heavy wet snow and blowing snow expected. Total snow accumulations between 5 and 10 inches. Winds gusting as high as 35 mph. * WHERE...Melville Foothills. * WHEN...Until noon MDT Monday. * IMPACTS...Travel could be very difficult on US-191 and local roads in the Melville vicinity. * ADDITIONAL DETAILS...Tree and power line damage is possible which may result in power outages. |
| Alert: | Winter Weather Advisory |
| Area(s): | Northern Park; Livingston Area; Beartooth Foothills; Northern Sweet Grass; Southern Wheatland |
| Effective: | 2026-10-11 @ 1:57 am -> 2026-10-12 @ 2:00 am |
| Onset: | 2026-10-11 @ 1:57 am -> 2026-10-12 @ 1:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2026-10-11 @ 1:57 am |
| Headline: | Winter Weather Advisory issued October 11 at 12:57AM MDT until October 12 at 12:00PM MDT by NWS Billings MT |
| Description: |
* WHAT...Periods of wet snow and blowing snow. Total snow accumulations between 2 and 6 inches with locally higher amounts possible. Winds gusting as high as 40 mph. * WHERE...Southern Wheatland, Beartooth Foothills, Livingston Area, Northern Park, and Northern Sweet Grass. * WHEN...Until noon MDT Monday. * IMPACTS...Travel could be difficult, due to slushy or snow covered roads and poor visibility. This includes US-191 from Big Timber to Judith Gap, I-90 from Big Timber to Livingston, and over Bozeman Pass. Conditions on I-90 over Bozeman Pass are expected to become particularly hazardous. * ADDITIONAL DETAILS...Tree and power line damage is possible where significant snow accumulation occurs, which may result in power outages. |
| Alert: | Winter Weather Advisory |
| Area(s): | Musselshell; Northern Stillwater; Golden Valley |
| Effective: | 2026-10-11 @ 1:57 am -> 2026-10-12 @ 2:00 am |
| 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 @ 1:57 am |
| Headline: | Winter Weather Advisory issued October 11 at 12:57AM MDT until October 12 at 12:00PM MDT by NWS Billings MT |
| Description: |
* WHAT...Periods of wet snow expected. Total snow accumulations up to 4 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...Travel could be difficult, due to areas of slushy or snowy roads and poor visibility. This includes US-87 over the Bull Mountains. * ADDITIONAL DETAILS...Highest amounts are expected over the higher hills including the Bull Mountains. |
| Alert: | Winter Storm Warning |
| Area(s): | Absaroka/Beartooth Mountains; Crazy Mountains |
| Effective: | 2026-10-11 @ 1:57 am -> 2026-10-12 @ 2:00 am |
| Onset: | 2026-10-11 @ 1:57 am -> 2026-10-12 @ 1:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2026-10-11 @ 1:57 am |
| Headline: | Winter Storm Warning issued October 11 at 12:57AM MDT until October 12 at 12:00PM MDT by NWS Billings MT |
| Description: |
* WHAT...Periods of heavy snow and blowing snow. Total snow accumulations between 10 and 18 inches. Winds gusting up to 35 mph. * WHERE...Absaroka/Beartooth Mountains and Crazy Mountains. * WHEN...Until noon MDT Monday. * IMPACTS...Recreation in the high country will be impacted by severe winter conditions. Travel into Cooke City may be impacted. |
| Alert: | Winter Storm Warning |
| Area(s): | Judith Gap |
| Effective: | 2026-10-11 @ 1:57 am -> 2026-10-12 @ 2:00 am |
| Onset: | 2026-10-11 @ 1:57 am -> 2026-10-12 @ 1:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2026-10-11 @ 1:57 am |
| Headline: | Winter Storm Warning issued October 11 at 12:57AM MDT until October 12 at 12:00PM MDT by NWS Billings MT |
| Description: |
* WHAT...Periods of heavy snow and blowing snow. Total snow accumulations between 4 and 8 inches with amounts near a foot in the mountains. North winds gusting up to 40 mph. * WHERE...Judith Gap. * WHEN...Until noon MDT Monday. * IMPACTS...Travel will be very difficult on US-191 through Judith Gap, due to slick snow covered roads, and poor visibility. * ADDITIONAL DETAILS...Tree and power line damage is possible which may result in power outages. |
| Alert: | Winter Weather Advisory |
| Area(s): | Southwest Phillips |
| Effective: | 2026-10-11 @ 12:31 am -> 2026-10-11 @ 7:15 pm |
| Onset: | 2026-10-11 @ 1:00 pm -> 2026-10-12 @ 1:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2026-10-11 @ 12:31 am |
| Headline: | Winter Weather Advisory issued October 10 at 11:31PM MDT until October 12 at 12:00PM MDT by NWS Glasgow MT |
| Description: |
* WHAT...Wet snow expected. Total snow accumulations of 1 to 4 inches with greatest amounts over the highest elevations of the Little Rockies. * WHERE...Southwest Phillips County. * WHEN...From noon Sunday to noon MDT Monday. * IMPACTS...Plan on slippery road conditions and reduced visibility at times, epecially Sunday night. |
| 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: | 2026-10-10 @ 11:40 pm -> 2026-10-11 @ 4:15 pm |
| Onset: | 2026-10-10 @ 11:40 pm -> 2026-10-12 @ 7:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-10-10 @ 11:40 pm |
| Headline: | Winter Storm Warning issued October 10 at 10:40PM MDT until October 12 at 6:00AM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Heavy, wet snow expected. Total snow accumulations between 10 and 20 inches, with the exception of the Lincoln valley where up to 7 inches is expected. Isolated amounts approaching 30 inches within the Bob Marshall Wilderness. Winds gusting as high as 45 mph. * WHERE...Portions of central and north central Montana. * WHEN...Until 6 AM MDT Monday. * IMPACTS...Travel could be very difficult. Gusty winds combined with the wet and heavy nature of the snow could bring down tree branches. Isolated power outages are possible. * ADDITIONAL DETAILS...Snowfall amounts will vary drastically from grassy surfaces to roadways, most notably at lower elevations, with accumulations on non-grassy surfaces being confined mainly to between the evening through late morning hours. |
| Alert: | Winter Storm Warning |
| Area(s): | Gallatin Valley |
| Effective: | 2026-10-10 @ 11:40 pm -> 2026-10-11 @ 4:15 pm |
| Onset: | 2026-10-11 @ 7:00 pm -> 2026-10-12 @ 10:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-10-10 @ 11:40 pm |
| Headline: | Winter Storm Warning issued October 10 at 10:40PM MDT until October 12 at 9:00AM MDT by NWS Great Falls MT |
| Description: |
* WHAT...For the Winter Weather Advisory, wet snow. Total snow accumulations up to two inches. Winds gusting as high as 40 mph. For the Winter Storm Warning, heavy, wet snow expected. Total snow accumulations between 4 and 8 inches. * WHERE...Gallatin Valley. * WHEN...For the Winter Weather Advisory, until 6 PM MDT Sunday. For the Winter Storm Warning, from 6 PM Sunday to 9 AM MDT Monday. * IMPACTS...Travel could be very difficult. Gusty winds combined with the wet and heavy nature of the snow could bring down tree branches. Isolated power outages are possible. The hazardous conditions will impact the Monday morning commute. * ADDITIONAL DETAILS...Snowfall amounts will vary drastically from grassy surfaces to roadways, most notably at lower elevations, with accumulations on non-grassy surfaces being confined mainly to between the evening through late morning hours. |
| Alert: | Winter Storm Warning |
| Area(s): | Big Belt, Bridger and Castle Mountains |
| Effective: | 2026-10-10 @ 11:40 pm -> 2026-10-11 @ 4:15 pm |
| Onset: | 2026-10-10 @ 11:40 pm -> 2026-10-12 @ 7:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-10-10 @ 11:40 pm |
| Headline: | Winter Storm Warning issued October 10 at 10:40PM MDT until October 12 at 6:00AM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Heavy, wet snow expected. Total snow accumulations between 6 and 14 inches. Winds gusting as high as 40 mph. * WHERE...Big Belt, Bridger and Castle Mountains. * WHEN...Until 6 AM MDT Monday. * IMPACTS...Travel could be very difficult. Gusty winds combined with the wet and heavy nature of the snow could bring down tree branches. Isolated power outages are possible. * ADDITIONAL DETAILS...Snowfall amounts will vary drastically from grassy surfaces to roadways, most notably at lower elevations, with accumulations on non-grassy surfaces being confined mainly to between the evening through late morning hours. |
| Alert: | Winter Storm Warning |
| Area(s): | Eastern Pondera and Eastern Teton; Cascade County below 5000ft; Judith Basin County and Judith Gap; Meagher County Valleys |
| Effective: | 2026-10-10 @ 11:40 pm -> 2026-10-11 @ 4:15 pm |
| Onset: | 2026-10-10 @ 11:40 pm -> 2026-10-12 @ 7:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-10-10 @ 11:40 pm |
| Headline: | Winter Storm Warning issued October 10 at 10:40PM MDT until October 12 at 6:00AM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Heavy, wet snow expected. Total snow accumulations between 7 and 14 inches. Winds gusting as high as 35 mph. * WHERE...Meagher County Valleys, Cascade County below 5000ft, Eastern Pondera and Eastern Teton, and Judith Basin County and Judith Gap. * WHEN...Until 6 AM MDT Monday. * IMPACTS...Travel could be very difficult. Gusty winds combined with the wet and heavy nature of the snow could bring down tree branches. Isolated power outages are possible. * ADDITIONAL DETAILS...Snowfall amounts will vary drastically from grassy surfaces to roadways, most notably at lower elevations, with accumulations on non-grassy surfaces being confined mainly to between the evening through late morning hours. |
| 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; Fergus County below 4500ft |
| Effective: | 2026-10-10 @ 11:40 pm -> 2026-10-11 @ 4:15 pm |
| Onset: | 2026-10-10 @ 11:40 pm -> 2026-10-12 @ 7:00 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-10-10 @ 11:40 pm |
| Headline: | Winter Weather Advisory issued October 10 at 10:40PM MDT until October 12 at 6:00AM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Snow expected. Total snow accumulations of between 3 to 5 inches across lower elevations, with 5 to 10 inches in the mountains. Locally higher amounts possible. Winds gusting as high as 40 mph. * WHERE...Bears Paw Mountains and Southern Blaine, Eastern Glacier, Western Toole, and Central Pondera, Eastern Toole and Liberty, Fergus County below 4500ft, and Western and Central Chouteau County. * WHEN...Until 6 AM MDT Monday. * IMPACTS...Travel could be difficult. Gusty winds combined with the wet and heavy nature of the snow could bring down tree branches. Isolated power outages are possible. * ADDITIONAL DETAILS...Snowfall amounts will vary drastically from grassy surfaces to roadways, most notably at lower elevations, with accumulations on non-grassy surfaces being confined mainly to between the evening through late morning hours. |
| Alert: | Winter Storm Warning |
| Area(s): | Little Belt and Highwood Mountains; Snowy and Judith Mountains; Elkhorn and Boulder Mountains |
| Effective: | 2026-10-10 @ 11:40 pm -> 2026-10-11 @ 4:15 pm |
| Onset: | 2026-10-10 @ 11:40 pm -> 2026-10-12 @ 7:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-10-10 @ 11:40 pm |
| Headline: | Winter Storm Warning issued October 10 at 10:40PM MDT until October 12 at 6:00AM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Heavy, wet snow expected. Total snow accumulations between 8 and 16 inches. Highest snowfall amounts in the northern slopes between 4500 feet and 6500 feet. Winds gusting as high as 45 mph. * 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. Gusty winds combined with the wet and heavy nature of the snow could bring down tree branches. Isolated power outages are possible. * ADDITIONAL DETAILS...Snowfall amounts will vary drastically from grassy surfaces to roadways, most notably at lower elevations, with accumulations on non-grassy surfaces being confined mainly to between the evening through late morning hours. |
| Alert: | Winter Weather Advisory |
| Area(s): | Helena Valley; Canyon Ferry Area; Missouri Headwaters; Madison River Valley; Northwest Beaverhead County; Beaverhead and Western Madison below 6000ft; Ruby Mountains and Southern Beaverhead Mountains; Gallatin and Madison County Mountains and Centennial Mountains |
| Effective: | 2026-10-10 @ 11:40 pm -> 2026-10-11 @ 4:15 pm |
| Onset: | 2026-10-10 @ 11:40 pm -> 2026-10-12 @ 7:00 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-10-10 @ 11:40 pm |
| Headline: | Winter Weather Advisory issued October 10 at 10:40PM MDT until October 12 at 6:00AM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Snow expected. Total snow accumulations of between 2 to 5 inches across lower elevations, with 5 to 8 inches in the mountains. Locally higher amounts possible. Winds gusting as high as 45 mph. * WHERE...Portions of central and southwest Montana. * WHEN...Until 6 AM MDT Monday. * IMPACTS...Travel could be difficult. Gusty winds combined with the wet and heavy nature of the snow could bring down tree branches. Isolated power outages are possible. * ADDITIONAL DETAILS...Snowfall amounts will vary drastically from grassy surfaces to roadways, most notably at lower elevations, with accumulations on non-grassy surfaces being confined mainly to between the evening through late morning hours. |
| Alert: | Winter Weather Advisory |
| Area(s): | Gallatin Valley |
| Effective: | 2026-10-10 @ 11:40 pm -> 2026-10-11 @ 4:15 pm |
| Onset: | 2026-10-10 @ 11:40 pm -> 2026-10-11 @ 7:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-10-10 @ 11:40 pm |
| Headline: | Winter Weather Advisory issued October 10 at 10:40PM MDT until October 11 at 6:00PM MDT by NWS Great Falls MT |
| Description: |
* WHAT...For the Winter Weather Advisory, wet snow. Total snow accumulations up to two inches. Winds gusting as high as 40 mph. For the Winter Storm Warning, heavy, wet snow expected. Total snow accumulations between 4 and 8 inches. * WHERE...Gallatin Valley. * WHEN...For the Winter Weather Advisory, until 6 PM MDT Sunday. For the Winter Storm Warning, from 6 PM Sunday to 9 AM MDT Monday. * IMPACTS...Travel could be very difficult. Gusty winds combined with the wet and heavy nature of the snow could bring down tree branches. Isolated power outages are possible. The hazardous conditions will impact the Monday morning commute. * ADDITIONAL DETAILS...Snowfall amounts will vary drastically from grassy surfaces to roadways, most notably at lower elevations, with accumulations on non-grassy surfaces being confined mainly to between the evening through late morning hours. |
| 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. |
| 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): | 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: | Wind Advisory |
| Area(s): | Flathead/Mission Valleys |
| Effective: | 2026-10-10 @ 9:27 am -> 2026-10-11 @ 4:00 pm |
| Onset: | 2026-10-10 @ 4:00 pm -> 2026-10-11 @ 4:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Missoula MT on 2026-10-10 @ 9:27 am |
| Headline: | Wind Advisory issued October 10 at 8:27AM MDT until October 11 at 3:00PM MDT by NWS Missoula MT |
| Description: |
* WHAT...Northeast to east winds 10 to 20 mph with gusts up to 40 mph expected. Isolated higher gusts of 50-55 mph on the east side of Flathead Lake, especially in west to east oriented gaps along Highway 35, also in the Lake Blaine area. * WHERE...Flathead/Mission Valleys. * WHEN...From 3 PM this afternoon to 3 PM MDT Sunday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs and weakened trees could be blown down and a few power outages may result. Strong winds and rough waves on area lakes will create hazardous conditions for small craft. |
| Alert: | Winter Storm Watch |
| Area(s): | Butte/Blackfoot Region |
| Effective: | 2026-10-09 @ 12:35 pm -> 2026-10-09 @ 12:51 pm |
| Onset: | 2026-10-10 @ 7:00 pm -> 2026-10-11 @ 7:00 pm |
| Severity: | Severe |
| Certainty: | Observed |
| Urgency: | Past |
| Issued By: | NWS Missoula MT on 2026-10-09 @ 12:35 pm |
| Headline: | The Winter Storm Watch has been replaced. Please see the latest information from NWS Missoula MT on this developing situation. |
| Description: |
The Winter Storm Watch has been replaced. Please see the latest information from NWS Missoula MT on this developing situation. |
