471
WWUS20 KWNS 171646
SEL8
SPC WW 171646
COZ000-NEZ000-WYZ000-172300-

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 428
NWS Storm Prediction Center Norman OK
1050 AM MDT Tue Jun 17 2025

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of
  Eastern Colorado
  Nebraska Panhandle
  Southeast Wyoming

* Effective this Tuesday morning and afternoon from 1050 AM until
  500 PM MDT.

* Primary threats include...
  Scattered large hail likely with isolated very large hail events
    to 3 inches in diameter possible
  Scattered damaging wind gusts to 70 mph possible
  A tornado or two possible

SUMMARY...Thunderstorms are expected to rapidly develop over the
foothills and mountains of central Colorado and southern Wyoming.
These storms will track slowly eastward through the afternoon,
posing a risk of large hail and perhaps a tornado or two.

The severe thunderstorm watch area is approximately along and 55
statute miles east and west of a line from 40 miles east northeast
of Douglas WY to 30 miles south southeast of Trinidad CO. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU8).

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.

&&

AVIATION...A few severe thunderstorms with hail surface and aloft to
3 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
27030.

...Hart