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918 

WWUS20 KWNS 271939

SEL9

SPC WW 271939

ILZ000-INZ000-MOZ000-280300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 229

NWS STORM PREDICTION CENTER NORMAN OK

240 PM CDT MON MAY 27 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  CENTRAL AND SOUTHERN ILLINOIS

  WEST-CENTRAL AND SOUTHWEST INDIANA

  EAST-CENTRAL MISSOURI



* EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 240 PM UNTIL

  1000 PM CDT.



* PRIMARY THREATS INCLUDE...

  SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  SEVERAL LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 75

STATUTE MILES EAST AND WEST OF A LINE FROM 20 MILES NORTH OF

DANVILLE ILLINOIS TO 45 MILES SOUTHWEST OF MOUNT VERNON ILLINOIS.

 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.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 227...WW 228...



DISCUSSION...LONG-LIVED MCS MOVING THROUGH THE MID-MS VALLEY HAS

RECENTLY INTENSIFIED AS INFLOW AIR MASS HAS WARMED INTO THE 80S WITH

DEWPOINTS CLIMBING THROUGH THE 50S INTO LOWER-MID 60S.  WHEN COUPLED

WITH MODESTLY STRONG UNIDIRECTIONAL WIND PROFILES...THE SETUP SHOULD

SUPPORT THE CONTINUED INTENSIFICATION OF THE MCS WITH A RISK FOR

DAMAGING WINDS AND SOME HAIL.



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

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 27030.





...MEAD

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