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239 

WWUS20 KWNS 191910

SEL9

SPC WW 191910

COZ000-KSZ000-NEZ000-200200-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 449

NWS Storm Prediction Center Norman OK

Issued by 15th OWS Scott Air Force Base IL

1240 PM MDT Thu Aug 19 2021



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Portions of Eastern Colorado

  Northwest Kansas

  West and Southwest Nebraska



* Effective this Thursday afternoon and evening from 1240 PM

  until 800 PM MDT.



* Primary threats include...

  Isolated damaging wind gusts to 60 mph possible

  Isolated large hail events to 1 inch in diameter possible



SUMMARY...Scattered severe thunderstorms will initiate within and

across portions of Eastern to Northeastern Colorado this afternoon.

Severe weather will continue to spread into Northwestern Kansas and

the Southwestern third of Nebraska to include the western panhandle

of the state. Large hail and damaging winds will be the primary

threat with a couple of tornadoes possible.



The severe thunderstorm watch area is approximately along and 95

statute miles either side of a line from 40 miles east northeast of

Alliance NE to 75 miles south southeast 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.



&&



AVIATION...A few severe thunderstorms with hail surface and aloft to

1 inch. Extreme turbulence and surface wind gusts to 50 knots. A few

cumulonimbi with maximum tops to 400. Mean storm motion vector

23030.



...15_ows

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