WWUS20 KWNS 212053
SEL9
SPC WW 212053
COZ000-NEZ000-220400-

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 239
NWS Storm Prediction Center Norman OK
255 PM MDT Thu May 21 2026

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of
  Northeast Colorado
  Nebraska Panhandle

* Effective this Thursday afternoon and evening from 255 PM until
  1000 PM MDT.

* Primary threats include...
  Scattered large hail and isolated very large hail events to 2
    inches in diameter possible
  Isolated damaging wind gusts to 70 mph possible
  A tornado or two possible

SUMMARY...Thunderstorms will develop this afternoon and spread
eastward across the watch area.  A few supercells are possible,
posing a risk of large hail.  A tornado or two is possible by early
evening as storms track into the eastern half of the watch.

The severe thunderstorm watch area is approximately along and 50
statute miles east and west of a line from 55 miles north northwest
of Sidney NE to 50 miles southwest of Burlington CO. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU9).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER...A Severe Thunderstorm Watch means conditions are
favorable for severe thunderstorms in and close to the watch area.
Persons in these areas should be on the lookout for threatening
weather conditions and listen for later statements and possible
warnings. Severe thunderstorms can and occasionally do produce
tornadoes.

&&

OTHER WATCH INFORMATION...CONTINUE...WW 238...

AVIATION...A few severe thunderstorms with hail surface and aloft to
2 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
28030.

...Hart