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: | 2026-10-23 @ 4:44 am -> 2026-10-23 @ 5:00 pm |
| Onset: | 2026-10-23 @ 1:00 pm -> 2026-10-24 @ 1:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2026-10-23 @ 4:44 am |
| Headline: | Lake Wind Advisory issued October 23 at 3:44AM MDT until October 24 at 12:00PM MDT by NWS Glasgow MT |
| Description: |
* WHAT...West winds 25 to 35 mph with gusts up to 50 mph expected. * WHERE...Fort Peck Lake. * WHEN...From noon today to noon MDT Saturday. * IMPACTS...Strong winds and rough waves on area lakes will create hazardous conditions for small craft. * ADDITIONAL DETAILS...Waves between 3 and 6 feet are expected across Fort Peck Lake this afternoon, tonight, and Saturday morning. |
| Alert: | Winter Weather Advisory |
| Area(s): | Judith Gap |
| Effective: | 2026-10-23 @ 3:55 am -> 2026-10-24 @ 4:00 am |
| Onset: | 2026-10-23 @ 4:00 pm -> 2026-10-24 @ 7:00 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2026-10-23 @ 3:55 am |
| Headline: | Winter Weather Advisory issued October 23 at 2:55AM MDT until October 24 at 6:00AM MDT by NWS Billings MT |
| Description: |
* WHAT...Snow and blowing snow expected. Total snow accumulations of 1 to 3 inches. North winds gusting as high as 55 mph. * WHERE...Judith Gap. * WHEN...From 3 PM this afternoon to 6 AM MDT Saturday. * IMPACTS...Plan on slushy to slick and snow covered road conditions, including along US-191. Blowing snow will cause poor visibility. Hazardous conditions will impact the evening commute. Damage to trees and power lines could lead to power outages. * ADDITIONAL DETAILS...The most difficult conditions are expected to occur between 5 pm and midnight. |
| Alert: | Red Flag Warning |
| Area(s): | Northern Cheyenne Indian Reservation/Ashland Ranger District Custer Natl Forest; Sioux Ranger District Custer National Forest; Sheridan County/Casper BLM |
| Effective: | 2026-10-23 @ 3:43 am -> 2026-10-24 @ 1:00 am |
| Onset: | 2026-10-23 @ 1:00 pm -> 2026-10-24 @ 1:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2026-10-23 @ 3:43 am |
| Headline: | Red Flag Warning issued October 23 at 2:43AM MDT until October 24 at 12:00AM MDT by NWS Billings MT |
| Description: |
* IMPACTS: Low humidities, unseasonably warm temperatures, strong gusty winds, and a wind shift with a cold front will create erratic fire behavior and difficult control of new or existing fires. * AFFECTED AREA: In North Central WY Fire Zone...274. In Southeast MT Fire Zone...131. In Southeast MT and Northwest SD Fire Zone...133. * COUNTIES AFFECTED: In North Central WY...Sheridan. In Northwest SD...Harding. In South Central MT...Big Horn. In Southeast MT...Carter...Fallon...Powder River...Rosebud Treasure. The most dangerous conditions are expected along and southeast of a Baker Montana to Sheridan Wyoming line. * COLD FRONT: Late afternoon into early evening. * WIND: Southwest 20 to 30 mph gusting up to 45 mph. Winds shifting to the northwest behind a late day cold front, with continued gusts to 45 mph through much of tonight. * HUMIDITY: Minimums of 14 to 20 percent. * TEMPERATURES: Highs of 75 to 85 degrees. |
| Alert: | High Wind Warning |
| Area(s): | Eastern Glacier, Western Toole, and Central Pondera; Eastern Toole and Liberty; Hill County |
| Effective: | 2026-10-23 @ 1:32 am -> 2026-10-23 @ 4:00 pm |
| Onset: | 2026-10-23 @ 12:00 pm -> 2026-10-23 @ 4:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-10-23 @ 1:32 am |
| Headline: | High Wind Warning issued October 23 at 12:32AM MDT until October 23 at 3:00PM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Northwest winds 35 to 45 mph, with gusts up to 65 mph expected. * WHERE...Eastern Glacier, Western Toole, and Central Pondera, Eastern Toole and Liberty, and Hill County. * WHEN...From 11 AM this morning to 3 PM MDT this afternoon. * IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles. |
| Alert: | High Wind Warning |
| Area(s): | Fergus County below 4500ft |
| Effective: | 2026-10-23 @ 1:32 am -> 2026-10-23 @ 6:00 pm |
| Onset: | 2026-10-23 @ 1:00 pm -> 2026-10-23 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-10-23 @ 1:32 am |
| Headline: | High Wind Warning issued October 23 at 12:32AM MDT until October 23 at 9:00PM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Northwest winds 30 to 40 mph, with gusts up to 60 mph expected. * WHERE...Fergus County below 4500ft. * WHEN...From noon today to 9 PM MDT this evening. * IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles. |
| Alert: | Winter Weather Advisory |
| Area(s): | Upper Blackfoot and MacDonald Pass; Big Belt, Bridger and Castle Mountains; Ruby Mountains and Southern Beaverhead Mountains |
| Effective: | 2026-10-23 @ 1:29 am -> 2026-10-23 @ 6:00 pm |
| Onset: | 2026-10-23 @ 1:00 pm -> 2026-10-24 @ 1:00 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-10-23 @ 1:29 am |
| Headline: | Winter Weather Advisory issued October 23 at 12:29AM MDT until October 24 at 12:00AM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Snow expected. Total snow accumulations 2 to 5 inches. Winds gusting as high as 35 mph. * WHERE...Big Belt, Bridger and Castle Mountains, Upper Blackfoot and MacDonald Pass, and Ruby Mountains and Southern Beaverhead Mountains. * WHEN...From noon today to midnight MDT tonight. * IMPACTS...Plan on slippery road conditions. The hazardous conditions will impact the Friday evening commute. |
| Alert: | Winter Weather Advisory |
| Area(s): | Elkhorn and Boulder Mountains; Northwest Beaverhead County; Gallatin and Madison County Mountains and Centennial Mountains |
| Effective: | 2026-10-23 @ 1:29 am -> 2026-10-23 @ 6:00 pm |
| Onset: | 2026-10-23 @ 1:00 pm -> 2026-10-24 @ 1:00 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-10-23 @ 1:29 am |
| Headline: | Winter Weather Advisory issued October 23 at 12:29AM MDT until October 24 at 12:00AM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Snow expected. Total snow accumulations 3 to 6 inches. * WHERE...Elkhorn and Boulder Mountains, Gallatin and Madison County Mountains and Centennial Mountains, and Northwest Beaverhead County. * WHEN...From noon today to midnight MDT tonight. * IMPACTS...Travel could be very difficult. The hazardous conditions will impact the Friday evening commute. |
| Alert: | Winter Weather Advisory |
| Area(s): | Little Belt and Highwood Mountains |
| Effective: | 2026-10-23 @ 1:29 am -> 2026-10-23 @ 6:00 pm |
| Onset: | 2026-10-23 @ 1:00 pm -> 2026-10-24 @ 1:00 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-10-23 @ 1:29 am |
| Headline: | Winter Weather Advisory issued October 23 at 12:29AM MDT until October 24 at 12:00AM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Snow expected. Total snow accumulations between 2 and 5 inches. Winds gusting as high as 45 mph. * WHERE...Little Belt and Highwood Mountains. * WHEN...From noon today to midnight MDT tonight. * IMPACTS...Plan on slippery road conditions. The hazardous conditions will impact the Friday evening commute. Gusty winds could bring down tree branches. |
| Alert: | Winter Weather Advisory |
| Area(s): | Bears Paw Mountains and Southern Blaine; Snowy and Judith Mountains |
| Effective: | 2026-10-23 @ 1:29 am -> 2026-10-23 @ 6:00 pm |
| Onset: | 2026-10-23 @ 5:00 pm -> 2026-10-24 @ 4:00 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-10-23 @ 1:29 am |
| Headline: | Winter Weather Advisory issued October 23 at 12:29AM MDT until October 24 at 3:00AM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Snow expected. Total snow accumulations 2 to 5 inches. Winds gusting as high as 50 mph. * WHERE...Snowy and Judith Mountains and Bears Paw Mountains and Southern Blaine. * WHEN...From 4 PM this afternoon to 3 AM MDT Saturday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions will impact the Friday evening commute. Gusty winds could bring down tree branches. |
| Alert: | Winter Weather Advisory |
| Area(s): | Judith Basin County and Judith Gap; Fergus County below 4500ft |
| Effective: | 2026-10-23 @ 1:29 am -> 2026-10-23 @ 6:00 pm |
| Onset: | 2026-10-23 @ 5:00 pm -> 2026-10-24 @ 4:00 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-10-23 @ 1:29 am |
| Headline: | Winter Weather Advisory issued October 23 at 12:29AM MDT until October 24 at 3:00AM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Snow expected. Total snow accumulations 1 to 3 inches. Winds gusting as high as 50 mph. * WHERE...Fergus County below 4500ft and Judith Basin County and Judith Gap. * WHEN...From 4 PM this afternoon to 3 AM MDT Saturday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions will impact the Friday evening commute. Gusty winds could bring down tree branches. |
| Alert: | Winter Weather Advisory |
| Area(s): | Butte/Blackfoot Region |
| Effective: | 2026-10-22 @ 11:24 am -> 2026-10-24 @ 1:00 am |
| Onset: | 2026-10-23 @ 4:00 pm -> 2026-10-24 @ 1:00 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Missoula MT on 2026-10-22 @ 11:24 am |
| Headline: | Winter Weather Advisory issued October 22 at 10:24AM MDT until October 24 at 12:00AM MDT by NWS Missoula MT |
| Description: |
* WHAT...Snow expected above 6000 feet. Total snow accumulations trace to three inches. A period of moderate snow showers may develop around rush hour. * WHERE...MacDonald and Homestake Pass along with Georgetown Lake. * WHEN...From 3 PM Friday to midnight MDT Friday Night. * IMPACTS...Plan on slippery road conditions. The hazardous conditions will impact the Friday evening commute. |
