Colorado Severe Thunderstorm Watch

WWUS20 KWNS 112029
SPC WW 112029

Severe Thunderstorm Watch Number 646
NWS Storm Prediction Center Norman OK
230 PM MDT Wed Sep 11 2019

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of
Northeast Colorado
Northwest Kansas
Western and Central Nebraska
Southeast Wyoming

* Effective this Wednesday afternoon and evening from 230 PM
until 1000 PM MDT.

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

SUMMARY…Thunderstorms are expected to rapidly develop this
afternoon and overspread much of the watch area this afternoon and
early evening. Supercells capable of large, damaging hail are the
main concern. However, an isolated tornado or two cannot be ruled

The severe thunderstorm watch area is approximately along and 95
statute miles north and south of a line from 25 miles east of North
Platte NE to 30 miles north of Cheyenne WY. For a complete depiction
of the watch see the associated watch outline update (WOUS64 KWNS


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

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