Yellowstone National Park, Wyoming
Regional Weather Alerts
| Alert: | Winter Weather Advisory |
| Area(s): | Northwest Beaverhead County; Ruby Mountains and Southern Beaverhead Mountains; Gallatin and Madison County Mountains and Centennial Mountains |
| Effective: | 2026-06-26 @ 1:29 pm -> 2026-06-27 @ 7:00 am |
| Onset: | 2026-06-27 @ 7:00 pm -> 2026-06-29 @ 1:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-06-26 @ 1:29 pm |
| Headline: | Winter Weather Advisory issued June 26 at 12:29PM MDT until June 29 at 12:00PM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Periods of wet snow expected. Total snow accumulations up to 4 inches above 6500 feet, with localized amounts in excess of 8 inches near highest peaks. * WHERE...Gallatin and Madison County Mountains and Centennial Mountains, Northwest Beaverhead County, and Ruby Mountains and Southern Beaverhead Mountains. * WHEN...From 6 PM Saturday to noon MDT Monday. * IMPACTS...Plan on cold and wet backcountry conditions with a heightened hypothermia risk for those not properly dressed. Wet snow may down trees and block access to forest roadways. * ADDITIONAL DETAILS...Campers should be aware that it only takes a few inches of snow to damage tents and other recreational items. |
| Alert: | Winter Storm Warning |
| Area(s): | Bitterroot/Sapphire Mountains |
| Effective: | 2026-06-26 @ 12:04 pm -> 2026-06-29 @ 10:00 am |
| Onset: | 2026-06-27 @ 7:00 pm -> 2026-06-29 @ 10:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Missoula MT on 2026-06-26 @ 12:04 pm |
| Headline: | Winter Storm Warning issued June 26 at 11:04AM MDT until June 29 at 9:00AM MDT by NWS Missoula MT |
| Description: |
* WHAT...Heavy wet snow expected above 6500 feet. Total snow accumulations of 4 to 8 inches, with up to 12 inches across the highest peaks. * WHERE...Skalkaho Pass, Nez Perce Pass, backcountry and higher elevation areas. * WHEN...From 6 PM Saturday to 9 AM MDT Monday. * IMPACTS...Plan for winter-like conditions in the backcountry and higher elevations. Cold temperatures and wet snow will elevate the risk of hypothermia. Heavy wet snow may down trees, blocking access to backcountry roadways. |
| Alert: | Winter Storm Warning |
| Area(s): | Butte/Blackfoot Region |
| Effective: | 2026-06-26 @ 12:04 pm -> 2026-06-29 @ 10:00 am |
| Onset: | 2026-06-27 @ 7:00 pm -> 2026-06-29 @ 10:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Missoula MT on 2026-06-26 @ 12:04 pm |
| Headline: | Winter Storm Warning issued June 26 at 11:04AM MDT until June 29 at 9:00AM MDT by NWS Missoula MT |
| Description: |
* WHAT...Heavy wet snow expected above 6500 feet. Total snow accumulations of 4 to 8 inches, with 8 to 16 inches across the Anaconda Pintler Mountains. * WHERE...Georgetown Lake, backcountry and higher elevation areas. * WHEN...From 6 PM Saturday to 9 AM MDT Monday. * IMPACTS...Plan for winter-like conditions in the backcountry and higher elevations. Cold temperatures and wet snow will elevate the risk of hypothermia. Heavy wet snow may down trees, blocking access to backcountry roadways. |
| Alert: | Lake Wind Advisory |
| Area(s): | Central and Southeast Phillips; Central and Southern Valley; Petroleum; Garfield; McCone |
| Effective: | 2026-06-26 @ 9:55 am -> 2026-06-27 @ 5:00 am |
| Onset: | 2026-06-26 @ 5:00 pm -> 2026-06-27 @ 5:00 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2026-06-26 @ 9:55 am |
| Headline: | Lake Wind Advisory issued June 26 at 8:55AM MDT until June 27 at 4:00AM MDT by NWS Glasgow MT |
| Description: |
* WHAT...East winds 15 to 25 mph with gusts up to 35 mph expected. * WHERE...Fort Peck Lake. * WHEN...From 4 PM this afternoon to 4 AM MDT Saturday. * IMPACTS...Strong winds and rough waves on area lakes will create hazardous conditions for small craft. * ADDITIONAL DETAILS...Wave heights to 4 feet. |