Idaho, Wyoming, Montana Winter Weather Advisory | Effective 04/23/2026 12:21

Headline: 
Winter Weather Advisory issued April 23 at 1:21PM MDT until April 23 at 11:00PM MDT by NWS Riverton WY
Event: 
Winter Weather Advisory
Urgency: 
Expected
Effective: 
April 23, 2026 - 12:21pm
Expires: 
April 23, 2026 - 10:00pm
Description: 
* WHAT...Snow. Additional snow accumulations of 1 to 4 inches with up to 1 inch of additional snow accumulation near Mammoth and the west entrance. Winds gusting between 20 and 35 mph. * WHERE...Yellowstone National Park. * WHEN...Until 11 PM MDT this evening. * IMPACTS...Travel could be difficult.
Instruction: 
Slow down and use caution while traveling. For graphical depictions of the snowfall forecast, including the official NWS forecast, high end amounts, and low end amounts, visit https://weather.gov/riw/winter. For current road conditions across Yellowstone National Park, visit https://nps.gov/yellowstone.
Area Description: 
Yellowstone National Park
Forcast Office: 
NWS Riverton WY
Sender: 
w-nws.webmaster@noaa.gov