< Wyoming Winter Storm Warning | Effective 05/18/2026 11:46

Wyoming Winter Storm Warning | Effective 05/18/2026 11:46

Headline: 
Winter Storm Warning issued May 18 at 12:46PM MDT until May 18 at 6:00PM MDT by NWS Riverton WY
Event: 
Winter Storm Warning
Urgency: 
Expected
Effective: 
May 18, 2026 - 11:46am
Expires: 
May 18, 2026 - 5:00pm
Description: 
* WHAT...Heavy snow expected. Total snow accumulations between 1 and 3 inches. Areas of higher amounts up to 4 inches between Hiland and Casper and for the south side of Casper. Winds gusting as high as 40 mph. * WHERE...Natrona County Lower Elevations. * WHEN...Until 6 PM MDT this evening. * IMPACTS...Travel will be difficult, especially along US Highway 20/26 between Hiland and Casper. 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: 
Natrona County Lower Elevations
Forcast Office: 
NWS Riverton WY