Winter Storm Warning Issued for Casper and Southeast Johnson County Through Thursday Morning
This alert is no longer in effect.
NOAA issued it on April 6, 2026, 4 months ago. Warnings of this kind stay in effect for hours to a few days, so this page is a historical record of what was issued, not a current warning. For conditions where you are right now, check weather.gov (US), weather.gc.ca (Canada), the Met Office (UK), or the Bureau of Meteorology (Australia).
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The National Weather Service has issued a Winter Storm Warning for parts of Wyoming, forecasting up to 8 inches of snow and 40 mph wind gusts through Thursday morning.
Read this weather record in 30 seconds
- Record type
- Winter Storm Warning
- Affected area
- Central Wyoming
- Issued
- April 6, 2026
- Issuing authority
- NWS Riverton
Storm notices can cover different combinations of wind, hail, lightning, and rainfall. Use the original notice for the hazards and boundaries attached to this specific record.
Record status: historical. It was issued 4 months ago; use the issuing agency's live warning service for current conditions in Central Wyoming.
Alert Details
The National Weather Service in Riverton, WY, has issued a Winter Storm Warning for Southeast Johnson County and the lower elevations of Natrona County. This alert indicates that severe winter weather conditions are likely and may pose a threat to life and property.
Affected Areas
The warning covers the following geographic regions in Wyoming:
- Natrona County Lower Elevations (including Casper)
- Southeast Johnson County
Expected Conditions
Residents should prepare for significant snowfall and windy conditions:
- Snow Accumulations: Between 3 and 6 inches are expected around Casper. Higher amounts of 4 to 8 inches are forecast across northern Natrona into southern Johnson Counties.
- Wind Speeds: Gusts are expected to reach as high as 40 mph.
- Snowfall Rates: The heaviest snowfall is forecast for late Wednesday evening into early Thursday morning, with rates potentially reaching 1 inch per hour.
- Visibility: Blowing snow and reduced visibilities are likely due to the combination of heavy snow and high wind gusts.
Timeline
The Winter Storm Warning is effective from 5:00 PM MST Wednesday, February 18, through 11:00 AM MST Thursday, February 19. Hazardous conditions are expected to specifically impact the Wednesday evening and Thursday morning commutes.
What You Should Do
Travel could be difficult during this period. If you must travel, the National Weather Service recommends keeping an extra flashlight, food, and water in your vehicle in case of an emergency. For the latest winter road conditions from the Wyoming Department of Transportation, residents should visit https://wyoroad.info.
Original source: NOAA Official Notice ↗
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