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WWUS20 KWNS 230535

SEL4

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URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 434

NWS Storm Prediction Center Norman OK

1235 AM CDT Sun Jul 23 2017



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Western Illinois

  Central and eastern Missouri



* Effective this Sunday morning from 1235 AM until 700 AM CDT.



* Primary threats include...

  Scattered damaging winds and isolated significant gusts to 75

    mph possible



SUMMARY...A persistent, well-organized bow echo and associated storm

complex is entering the watch area with a history of severe/damaging

winds in the KC metro.  This risk continues eastward and

east-northeastward as the activity encounters a corridor of

favorable moisture and instability extending past the Mississippi

River.



The severe thunderstorm watch area is approximately along and 60

statute miles north and south of a line from 20 miles northwest of

Columbia MO to 40 miles north northeast of Saint Louis MO. For a

complete depiction of the watch see the associated watch outline

update (WOUS64 KWNS WOU4).



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 433...



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE and ALOFT

TO 1 INCH. EXTREME TURBULENCE and SURFACE WIND GUSTS TO 65 KNOTS.

A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM MOTION

VECTOR 26035.





...Edwards

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