615
NWUS55 KCYS 232232
LSRCYS

Preliminary Local Storm Report
National Weather Service Cheyenne WY
432 PM MDT Sat May 23 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0800 PM     Wildfire         20 N Bill               43.50N 105.24W
05/13/2026                   Converse           WY   Other Federal

            Afternoon dry thunderstorms were observed in
            the area which likely influenced this fire.
            No lightning strike was recorded by ground
            based networks within the fire perimeter
            however. A nearby RAWS station in Rochelle
            Hills was sampling relative humidity values
            down to 8% and wind gusts to 42 MPH leading
            up to the fire start. The perimeter of the
            fire in the CYS area based on high
            resolution satellite imagery is
            approximately 720 acres, out of 1318 total
            acreage. The fire was contained by May 20th.

0947 PM     Wildfire         10 ESE Crawford         42.63N 103.24W
05/13/2026                   Dawes              NE   Other Federal

            This wildfire is estimated to have reached
            about 1,028 acres of burned forest and
            grasslands. A probable cause of the fire is
            from lightning. The timing is based on a
            nearby lightning strike detected by ground
            based detection network. During the evening
            of May 14 the fire increased in intensity on
            the GOES shortwave infrared channel with an
            apparent increase in the smoke plume
            observed on visible. The peak shortwave
            temperature value reached was 160 degrees
            Fahrenheit. By the morning of May 20th the
            fire was reported to be 100 percent
            contained.


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