Idaho, Wyoming, Montana Winter Weather Advisory | Effective 04/21/2026 11:09
* WHAT...Snow expected. Total snow accumulations between 6 and 12<br />
inches with the highest amounts across southwestern portions of<br />
the Park. Winds gusting as high as 40 mph.
* WHERE...Yellowstone National Park.
* WHEN...From noon Wednesday to 11 PM MDT Thursday.
* IMPACTS...Travel could be very difficult.
* ADDITIONAL DETAILS...Total snow amounts up to 3 inches at Mammoth.<br />
Slow down and use caution while traveling.
For graphical depictions of the snowfall forecast, including the<br />