349
NWUS55 KBOU 220237
LSRBOU

Preliminary Local Storm Report...Summary
National Weather Service Denver CO
837 PM MDT Thu May 21 2026

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

0550 PM     Hail             7 SE Last Chance        39.65N 103.50W
05/21/2026  E4.50 Inch       Washington         CO   Storm Chaser

            Storm Chaser estimated hail size was 4.5
            inches in diameter.

0547 PM     Tornado          2 WSW Thurman           39.58N 103.25W
05/21/2026                   Washington         CO   Storm Chaser

            Brief Tornado lasted one minute.

0547 PM     Hail             1 S Thurman             39.58N 103.22W
05/21/2026  E3.00 Inch       Washington         CO   Trained Spotter

            Report from mPING: Tea Cup (3.00 in.).

0544 PM     Hail             1 S Thurman             39.58N 103.22W
05/21/2026  E2.75 Inch       Washington         CO   Public

            Report from mPING: Baseball (2.75 in.).

0544 PM     Hail             2 WNW Thurman           39.61N 103.24W
05/21/2026  M2.75 Inch       Washington         CO   Trained Spotter



0541 PM     Tornado          3 WSW Thurman           39.57N 103.27W
05/21/2026                   Washington         CO   Storm Chaser

            Tornado lasted 4 minutes.

0535 PM     Tornado          3 WNW Thurman           39.61N 103.27W
05/21/2026                   Washington         CO   Trained Spotter

            Brief ground circulation. Report via
            NWSChat.

0534 PM     Hail             5 NW Thurman            39.65N 103.29W
05/21/2026  E1.25 Inch       Washington         CO   Public

            Report from mPING: Half Dollar (1.25 in.).

0531 PM     Hail             5 NW Thurman            39.65N 103.29W
05/21/2026  E1.00 Inch       Washington         CO   Public

            Report from mPING: Quarter (1.00 in.).

0519 PM     Hail             6 S Lindon              39.64N 103.41W
05/21/2026  M2.50 Inch       Washington         CO   Storm Chaser

            Report from mPING: Tennis Ball (2.50 in.).

0506 PM     Hail             5 SSE Last Chance       39.67N 103.53W
05/21/2026  M2.50 Inch       Washington         CO   Trained Spotter



0458 PM     Hail             7 S Last Chance         39.62N 103.59W
05/21/2026  M1.75 Inch       Washington         CO   Storm Chaser

            Report from mPING: Golf Ball (1.75 in.).

0450 PM     Hail             5 S Last Chance         39.65N 103.59W
05/21/2026  E1.00 Inch       Washington         CO   Storm Chaser

            Report from mPING: Quarter (1.00 in.).

0402 PM     Hail             3 N Deer Trail          39.67N 104.04W
05/21/2026  E1.50 Inch       Arapahoe           CO   Public

            Report from mPING: Ping Pong Ball (1.50
            in.).

0344 PM     Hail             Deer Trail              39.62N 104.04W
05/21/2026  M1.00 Inch       Arapahoe           CO   Storm Chaser




&&

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