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106 

WWUS20 KWNS 252009

SEL3

SPC WW 252009

ILZ000-INZ000-OHZ000-260300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 363

NWS STORM PREDICTION CENTER NORMAN OK

305 PM CDT TUE JUN 25 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  NORTH CENTRAL ILLINOIS

  NORTHERN INDIANA

  NORTHWEST OHIO



* EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 305 PM UNTIL

  1000 PM CDT.



* PRIMARY THREATS INCLUDE...

  NUMEROUS DAMAGING WIND GUSTS TO 70 MPH LIKELY

  SEVERAL LARGE HAIL EVENTS WITH A FEW VERY LARGE HAIL EVENTS TO 2

    INCHES IN DIAMETER POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 65

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 40 MILES WEST OF

PEORIA ILLINOIS TO 25 MILES SOUTHEAST OF FORT WAYNE INDIANA.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU3).



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 361...WW 362...



DISCUSSION...STORM DEVELOPMENT IS NOW UNDERWAY ACROSS CENTRAL

ILLINOIS... PERHAPS AIDED BY FORCING ASSOCIATED WITH A SHORT WAVE

IMPULSE MIGRATING EAST OF THE MIDDLE MISSISSIPPI VALLEY.  IN THE

PRESENCE OF THERMODYNAMIC PROFILES CHARACTERIZED BY FAIRLY STEEP

MID-LEVEL LAPSE RATES AND LARGE CAPE...DEEP LAYER WESTERLY FLOW AND

VERTICAL SHEAR IS SUFFICIENT TO SUPPORT THE UPSCALE GROWTH FROM

SUPERCELLS TO AN INCREASINGLY ORGANIZED...EASTWARD ADVANCING

MESOSCALE CONVECTIVE SYSTEM CAPABLE OF PRODUCING DAMAGING WIND

GUSTS.



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

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

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

MOTION VECTOR 27030.





...KERR

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