< Wyoming Winter Storm Warning | Effective 05/18/2026 09:42

Wyoming Winter Storm Warning | Effective 05/18/2026 09:42

Headline: 
Winter Storm Warning issued May 18 at 10:42AM MDT until May 18 at 6:00PM MDT by NWS Riverton WY
Event: 
Winter Storm Warning
Urgency: 
Expected
Effective: 
May 18, 2026 - 9:42am
Expires: 
May 18, 2026 - 5:00pm
Description: 
* WHAT...Heavy snow possible. Additional snow accumulations between 3 and 6 inches possible. Winds could gust as high as 40 mph. * WHERE...Casper Mountain. * WHEN...Until 6 PM MDT this evening. * IMPACTS...Travel will be very difficult. Areas of blowing snow could significantly reduce visibility. Heavy snow could break tree limbs as many trees have leafed out.
Instruction: 
If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. 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 winter road conditions from the Wyoming Department of Transportation, visit https://wyoroad.info .
Area Description: 
Casper Mountain
Forcast Office: 
NWS Riverton WY