44°31'N / 109°3'W / Altitude 1522 m / 17:03 2026/04/21, America/Denver (UTC-6)
From: 2026/04/21, 12:03
To: 2026/04/22, 07:00
* AFFECTED AREA: In Central WY Fire Zones...280...283...285...289...300. In North Central WY Fire Zones...275...276...281...282...287. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Big Horn...Hot Springs...Johnson...Park Washakie. In Southwest WY...Sweetwater. * IMPACTS: Low Humidities and Strong Gusty Winds could cause erratic fire behavior. * WIND: Southwest 25 to 35 mph with gusts up to 55 mph. * HUMIDITY: As low as 10 to 15 percent. * ADDITIONAL DETAILS: While wind will not be as strong as on Wednesday, elevated to near critical fire weather conditions will be seen today across much of the same area.
Park,Cody Foothills
A Fire Weather Watch means that critical fire weather conditions
are forecast to occur. Listen for later forecasts and possible Red
Flag Warnings.
NWS Riverton WY
2026/04/21, 12:03
From: 2026/04/21, 12:09
To: 2026/04/22, 07:00
* WHAT...Snow expected. Total snow accumulations between 6 and 12 inches with the highest amounts across southwestern portions of 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.
ParkSlow 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.NWS Riverton WY2026/04/21, 12:09