NWS Cheyenne WYSV.W 0339September 6, 2026
Severe Thunderstorm Warning: Converse, Niobrara and Platte, WY
The National Weather Service office in Cheyenne issued a severe thunderstorm warning for Converse, Niobrara and Platte in Wyoming, which was in force until 10:00 p.m. local time on September 6. It was the 339th severe thunderstorm warning the NWS office in Cheyenne issued in 2026. Wyoming had 7 severe thunderstorm warnings in September 2026, against 10 in an average September of 2008-2025 (Wyoming's severe thunderstorm warnings by year).
ExpiredWarning
In force for 43 minutes; it has expired. The agency may have replaced it with a new notice.
The notice
- Issued by
- National Weather Service, Cheyenne WY
- Area
- Converse, Niobrara and Platte
- State
- Wyoming
- Level
- Warning
- Issued
- 9:17 p.m. MDT, September 6, 2026
- Expires
- 10:00 p.m. MDT, September 6, 2026
- CAP severity, certainty, urgency
- Severe, Observed, Immediate
- VTEC event
- KCYS SV.W 0339
- Official source
- National Weather Service: the notice at its source
Source: National Weather Service: the notice at its source. AreaZine rebuilds this page from the agency's record; the agency's page is the one to act on. A U.S. Government work, in the public domain.
The notice as issued
SVRCYS The National Weather Service in Cheyenne has issued a * Severe Thunderstorm Warning for... Southwestern Niobrara County in east central Wyoming... Northern Platte County in southeastern Wyoming... East central Converse County in east central Wyoming... * Until 1000 PM MDT. * At 916 PM MDT, severe thunderstorms were located along a line extending from near Glendo to Westview Circle, moving northeast at 35 mph. HAZARD...70 mph wind gusts and penny size hail. SOURCE...Radar indicated. IMPACT...Expect considerable tree damage. Damage is likely to mobile homes, roofs, and outbuildings. * Locations impacted include... Wheatland, Guernsey, Glendo, Hartville, Lakeview North, Sibley Peak, Westview Circle, Glendo State Park, Register Cliff State Historic Site, Reno Cove Campground, Sandy Beach Campground, Sandy Cove Campground, Two Moon Campground, Guernsey State Park, Keeline, Oregon Trail Ruts State Historic Site, Dwyer Junction, Bennett Hill Campground, Lost Springs, and Cassa.
What the agency told people to do
For your protection move to an interior room on the lowest floor of a building. Torrential rainfall is occurring with these storms, and may lead to flash flooding. Do not drive your vehicle through flooded roadways.
Source: National Weather Service: the notice at its source. The text is the agency's, unedited. A U.S. Government work, in the public domain.