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908 

WWUS20 KWNS 091909

SEL0

SPC WW 091909

ILZ000-INZ000-KYZ000-MOZ000-100200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 290

NWS STORM PREDICTION CENTER NORMAN OK

205 PM CDT SUN JUN 9 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  CENTRAL AND SOUTHERN ILLINOIS

  SOUTHWEST INDIANA

  WESTERN KENTUCKY

  SOUTHEAST MISSOURI



* EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 205 PM UNTIL

  900 PM CDT.



* PRIMARY THREATS INCLUDE...

  SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  SEVERAL LARGE HAIL EVENTS TO 1 INCH IN DIAMETER POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70

STATUTE MILES EAST AND WEST OF A LINE FROM 35 MILES NORTH

NORTHWEST OF CHAMPAIGN ILLINOIS TO 40 MILES SOUTH SOUTHWEST OF

PADUCAH KENTUCKY.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).



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.



&&



DISCUSSION...TSTMS FORMING ALONG LOW-LVL CONFLUENCE AXIS ATTM

EXTENDING NNE FROM NEAR THE MO BOOTHEEL TO JUST E OF STL TO JUST W

OF SPRINGFIELD IL EXPECTED INTENSIFY AS THEY MOVE/DEVELOP NNE INTO

MORE STRONGLY-HEATED...MOISTENING ENVIRONMENT. MODERATE/LARGELY

UNIDIRECTIONAL SWLY DEEP SHEAR...AND FORCING FOR ASCENT ASSOCIATED

WITH VORT LOBE MOVING E AROUND BASE OF IA/MO UPR LOW...SUGGEST

STORMS WILL EVOLVE INTO ONE OR MORE BANDS...WITH EMBEDDED LEWPS/BOWS

POSING A RISK FOR LOCALLY DMGG WIND...MARGINALLY SVR HAIL...AND

PERHAPS A TORNADO.



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 500. MEAN STORM MOTION

VECTOR 22030.





...CORFIDI

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