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WWUS20 KWNS 042032

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ILZ000-KSZ000-MOZ000-050300-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 518

NWS Storm Prediction Center Norman OK

235 PM CST Mon Dec 4 2017



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Extreme west central Illinois

  Extreme southeast Kansas

  Much of southwest, central and northeast Missouri



* Effective this Monday afternoon and evening from 235 PM until

  900 PM CST.



* Primary threats include...

  Scattered damaging wind gusts to 70 mph possible

  Isolated large hail events to 1 inch in diameter possible

  A tornado or two possible



SUMMARY...Thunderstorms are beginning to form along a cold front,

and these storms will increase in coverage and strengthen gradually

through the afternoon/evening while spreading eastward.  Embedded

supercells and/or bowing segments could produce damaging winds, as

well as a brief tornado and marginally severe hail.



The severe thunderstorm watch area is approximately along and 60

statute miles east and west of a line from 25 miles east northeast

of Kirksville MO to 25 miles southwest of Springfield MO. 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

1 inch. Extreme turbulence and surface wind gusts to 60 knots. A few

cumulonimbi with maximum tops to 450. Mean storm motion vector

24045.



...Thompson

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