Severe Thunderstorm Warning for Big Horn, Johnson, Washakie Counties WY
This alert is no longer in effect.
NOAA issued it on July 27, 2026, 3 weeks 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).
Areazine synthesizes this NWS weather alert directly from NOAA's official public data feed. See our methodology for full source attribution and refresh cadence.
NWS Riverton has issued a Severe Thunderstorm Warning for parts of Wyoming until 5:00 PM MDT June 20, with 60 mph winds observed.
Read this weather record in 30 seconds
- Record type
- Severe Thunderstorm Warning
- Affected area
- Wyoming
- Issued
- July 27, 2026
- Issuing authority
- NWS Riverton WY
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 3 weeks ago; use the issuing agency's live warning service for current conditions in Wyoming.
Alert Details
Severe Thunderstorm Warning issued by NWS Riverton WY. Effective from 2026-06-20T16:14:00-06:00 until 2026-06-20T17:00:00-06:00. Alert type code: SVR.
Affected Areas
Big Horn County, Johnson County, and Washakie County in Wyoming. Specific areas include Northwestern Johnson County, Southeastern Big Horn County, and Northeastern Washakie County. Locations impacted include Cloud Peak and areas near Ten Sleep.
What You Should Do
For your protection move to an interior room on the lowest floor of a building.
Expected Conditions
At 4:12 PM MDT a severe thunderstorm was located near Ten Sleep moving northeast at 35 mph. Hazard includes 60 mph wind gusts (radar indicated) and hail up to 0.75 inches. Expect damage to roofs, siding, and trees.
Timeline
The warning is in effect until 5:00 PM MDT on June 20, 2026.
Original source: NOAA Official Notice ↗
Related Weather Alerts
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Two Areazine-derived peer sets for this NWS weather alert: nearest notices by body length and by same severity near the same agency date. Peers come from other categories so they are not the same-feed Related list above.
Similar body length
Nearest notices by article body length (847 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to July 27, 2026.
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