Yellowstone National Park, Wyoming
Regional Weather Alerts
| Alert: | Winter Weather Advisory |
| Area(s): | Northern Park; Judith Gap; Livingston Area; Beartooth Foothills; Northern Sweet Grass; Southern Wheatland |
| Effective: | 2026-10-09 @ 8:00 pm -> 2026-10-10 @ 8:00 pm |
| Onset: | 2026-10-11 @ 1:00 am -> 2026-10-12 @ 1:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2026-10-09 @ 8:00 pm |
| Headline: | Winter Weather Advisory issued October 9 at 7:00PM MDT until October 12 at 12:00PM MDT by NWS Billings MT |
| Description: |
* WHAT...Periods of wet snow expected. Total snow accumulations between 2 and 6 inches. Winds gusting as high as 40 mph. * WHERE...Portions of central and south central Montana. * WHEN...From midnight Saturday Night to noon MDT Monday. * IMPACTS...Travel could be difficult, due to areas of slushy or snowy roads and poor visibility. This includes US-191 from Big Timber to Judith Gap, and I-90 from Big Timber to Livingston and Bozeman Pass. * ADDITIONAL DETAILS...Travel on I-90 west of Livingston over Bozeman Pass is expected to become particularly hazardous during this winter event. Snow amounts in excess of 6 inches are expected to impact the pass. Please be prepared if you have travel plans. |
| Alert: | Winter Storm Warning |
| Area(s): | Melville Foothills |
| Effective: | 2026-10-09 @ 8:00 pm -> 2026-10-10 @ 8:00 pm |
| Onset: | 2026-10-11 @ 1:00 am -> 2026-10-12 @ 1:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2026-10-09 @ 8:00 pm |
| Headline: | Winter Storm Warning issued October 9 at 7:00PM MDT until October 12 at 12:00PM MDT by NWS Billings MT |
| Description: |
* WHAT...Periods of heavy wet snow expected. Total snow accumulations between 5 and 10 inches. Winds gusting as high as 40 mph. * WHERE...Melville Foothills. * WHEN...From midnight Saturday Night to noon MDT Monday. * IMPACTS...Travel on US-191 through Melville could be very difficult, due to snowy roads and poor visibility. |
| Alert: | Winter Storm Warning |
| Area(s): | Absaroka/Beartooth Mountains; Crazy Mountains |
| Effective: | 2026-10-09 @ 8:00 pm -> 2026-10-10 @ 8:00 pm |
| Onset: | 2026-10-10 @ 7:00 pm -> 2026-10-12 @ 1:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2026-10-09 @ 8:00 pm |
| Headline: | Winter Storm Warning issued October 9 at 7:00PM MDT until October 12 at 12:00PM MDT by NWS Billings MT |
| Description: |
* WHAT...Periods of heavy snow expected. Total snow accumulations between 10 and 18 inches, greatest above 8000 feet. Winds gusting as high as 35 mph. * WHERE...Absaroka/Beartooth Mountains and Crazy Mountains. * WHEN...From 6 PM Saturday to noon MDT Monday. * IMPACTS...Recreation in the high country will be impacted by harsh wintry conditions. Be prepared. |
| Alert: | Wind Advisory |
| Area(s): | Flathead/Mission Valleys |
| Effective: | 2026-10-09 @ 12:38 pm -> 2026-10-10 @ 12:45 pm |
| Onset: | 2026-10-10 @ 7:00 pm -> 2026-10-11 @ 7:00 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Missoula MT on 2026-10-09 @ 12:38 pm |
| Headline: | Wind Advisory issued October 9 at 11:38AM MDT until October 11 at 6:00AM MDT by NWS Missoula MT |
| Description: |
* WHAT...For the Lake Wind Advisory, southwest winds 10 to 20 mph with gusts up to 35 mph expected. For the Wind Advisory, northeast winds 15 to 25 mph with gusts up to 40 mph expected. Isolated higher gusts nearing 50 mph will be possible in west to east oriented gaps along Highway 35, including Lake Blaine * WHERE...Flathead/Mission Valleys. * WHEN...For the Lake Wind Advisory, until 9 PM MDT this evening. For the Wind Advisory, from 6 PM Saturday to 6 AM MDT Sunday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs 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. |
| Alert: | Winter Weather Advisory |
| Area(s): | West Glacier Region |
| Effective: | 2026-10-09 @ 12:35 pm -> 2026-10-10 @ 12:45 pm |
| 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 2026-10-09 @ 12:35 pm |
| Headline: | Winter Weather Advisory issued October 9 at 11:35AM 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...Glacier National Park, Marias Pass, Essex, Polebridge, Bad Rock Canyon, and Highway 83 Bigfork to Swan Lake. * WHEN...From 6 PM Saturday to 6 AM MDT Monday. * IMPACTS...Plan on slippery road conditions. * ADDITIONAL DETAILS...Prepare for difficult backcountry travel. |
| Alert: | Winter Weather Advisory |
| Area(s): | Bitterroot/Sapphire Mountains; Potomac/Seeley Lake Region |
| Effective: | 2026-10-09 @ 12:35 pm -> 2026-10-10 @ 12:45 pm |
| 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 2026-10-09 @ 12:35 pm |
| Headline: | Winter Weather Advisory issued October 9 at 11:35AM MDT until October 12 at 6:00AM MDT by NWS Missoula MT |
| Description: |
* WHAT...Snow expected. Total snow accumulations between 2 and 6 inches. Winds gusting as high as 40 mph. * WHERE...I-90 East Missoula to Bearmouth, Highway 83 Seeley Lake to Condon, Highway 200 Bonner to Greenough, Lolo Pass, and Highway 93 Sula to Lost Trail Pass. * WHEN...From 6 PM Saturday to 6 AM MDT Monday. * IMPACTS...Travel could be very difficult. * ADDITIONAL DETAILS...Prepare for difficult backcountry travel. |
| Alert: | Winter Storm Warning |
| Area(s): | Butte/Blackfoot Region |
| Effective: | 2026-10-09 @ 12:35 pm -> 2026-10-10 @ 12:45 pm |
| 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 2026-10-09 @ 12:35 pm |
| Headline: | Winter Storm Warning issued October 9 at 11:35AM 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. Winds gusting as high as 45 mph. * WHERE...MacDonald Pass, Georgetown Lake, Highway 12 Garrison to Elliston, Butte, and Homestake Pass. * WHEN...From 6 PM Saturday to 6 AM MDT Monday. * IMPACTS...Travel could be very difficult. |
| Alert: | Winter Storm Warning |
| Area(s): | Snowy and Judith Mountains |
| Effective: | 2026-10-09 @ 12:29 pm -> 2026-10-10 @ 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 Great Falls MT on 2026-10-09 @ 12:29 pm |
| Headline: | Winter Storm Warning issued October 9 at 11:29AM MDT until October 12 at 6:00AM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Heavy snow expected. Total snow accumulations between 6 and 12 inches. * WHERE...Snowy and Judith Mountains. * WHEN...From 6 PM Saturday to 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): | Gallatin and Madison County Mountains and Centennial Mountains |
| Effective: | 2026-10-09 @ 12:29 pm -> 2026-10-10 @ 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 Great Falls MT on 2026-10-09 @ 12:29 pm |
| Headline: | Winter Weather Advisory issued October 9 at 11:29AM MDT until October 12 at 6:00AM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Heavy wet snow possible. Total snow accumulations between 4 and 8 inches, with isolated amounts up to 12 inches above 8000 feet. Snow accumulation in the West Yellowstone area and valleys near the Idaho border of up to 2 inches. Winds could gust as high as 45 mph. * WHERE...Gallatin and Madison County Mountains and Centennial Mountains. * WHEN...From 6 PM Saturday to 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): | East Glacier Park Region; Northern High Plains; 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: | 2026-10-09 @ 12:29 pm -> 2026-10-10 @ 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 Great Falls MT on 2026-10-09 @ 12:29 pm |
| Headline: | Winter Weather Advisory issued October 9 at 11:29AM 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 10 inches in the mountains. Winds gusting as high as 40 mph. * WHERE...A portion of north central Montana. * WHEN...From 6 PM Saturday to 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): | Big Belt, Bridger and Castle Mountains |
| Effective: | 2026-10-09 @ 12:29 pm -> 2026-10-10 @ 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 Great Falls MT on 2026-10-09 @ 12:29 pm |
| Headline: | Winter Storm Warning issued October 9 at 11:29AM MDT until October 12 at 6:00AM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Heavy snow expected. Total snow accumulations between 6 and 12 inches. Winds gusting as high as 40 mph. * WHERE...Big Belt, Bridger and Castle Mountains. * WHEN...From 6 PM Saturday to 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 |
| Effective: | 2026-10-09 @ 12:29 pm -> 2026-10-10 @ 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 Great Falls MT on 2026-10-09 @ 12:29 pm |
| Headline: | Winter Weather Advisory issued October 9 at 11:29AM MDT until October 12 at 6:00AM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Snow expected. Total snow accumulations between 3 and 5 inches. Winds gusting as high as 45 mph. * WHERE...Helena Valley. * WHEN...From 6 PM Saturday to 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): | Eastern Pondera and Eastern Teton |
| Effective: | 2026-10-09 @ 12:29 pm -> 2026-10-10 @ 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 Great Falls MT on 2026-10-09 @ 12:29 pm |
| Headline: | Winter Storm Warning issued October 9 at 11:29AM MDT until October 12 at 6:00AM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Heavy snow expected. Total snow accumulations between 3 and 6 inches. * WHERE...Eastern Pondera and Eastern Teton. * WHEN...From 6 PM Saturday to 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): | Cascade County below 5000ft; Judith Basin County and Judith Gap; Meagher County Valleys |
| Effective: | 2026-10-09 @ 12:29 pm -> 2026-10-10 @ 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 Great Falls MT on 2026-10-09 @ 12:29 pm |
| Headline: | Winter Storm Warning issued October 9 at 11:29AM MDT until October 12 at 6:00AM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Heavy snow expected. Total snow accumulations between 5 and 10 inches. Winds gusting as high as 35 mph. * WHERE...Meagher County Valleys, Cascade County below 5000ft, and Judith Basin County and Judith Gap. * WHEN...From 6 PM Saturday to 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): | Canyon Ferry Area; Missouri Headwaters; Madison River Valley; Gallatin Valley; Northwest Beaverhead County; Beaverhead and Western Madison below 6000ft; Ruby Mountains and Southern Beaverhead Mountains |
| Effective: | 2026-10-09 @ 12:29 pm -> 2026-10-10 @ 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 Great Falls MT on 2026-10-09 @ 12:29 pm |
| Headline: | Winter Weather Advisory issued October 9 at 11:29AM 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. Winds gusting as high as 40 mph. * WHERE...Portions of central and southwest Montana. * WHEN...From 6 PM Saturday to 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; Elkhorn and Boulder Mountains |
| Effective: | 2026-10-09 @ 12:29 pm -> 2026-10-10 @ 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 Great Falls MT on 2026-10-09 @ 12:29 pm |
| Headline: | Winter Storm Warning issued October 9 at 11:29AM MDT until October 12 at 6:00AM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Heavy snow expected. Total snow accumulations between 6 and 12 inches. Winds gusting as high as 45 mph. * WHERE...Elkhorn and Boulder Mountains and Little Belt and Highwood Mountains. * WHEN...From 6 PM Saturday to 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): | Southern Rocky Mountain Front; Southern High Plains; Upper Blackfoot and MacDonald Pass; Gates of the Mountains |
| Effective: | 2026-10-09 @ 12:29 pm -> 2026-10-10 @ 7:00 am |
| Onset: | 2026-10-10 @ 1:00 pm -> 2026-10-12 @ 7:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-10-09 @ 12:29 pm |
| Headline: | Winter Storm Warning issued October 9 at 11:29AM MDT until October 12 at 6:00AM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Heavy snow expected. Total snow accumulations between 10 and 20 inches, with the exception of the Lincoln valley where up to 6 inches is expected. Winds gusting as high as 45 mph. * WHERE...Gates of the Mountains, Upper Blackfoot and MacDonald Pass, Southern High Plains, and Southern Rocky Mountain Front. * WHEN...From noon Saturday to 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. |
