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696 

WWUS20 KWNS 290136

SEL6

SPC WW 290136

INZ000-MIZ000-LMZ000-290600-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 236

NWS STORM PREDICTION CENTER NORMAN OK

940 PM EDT TUE MAY 28 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  NORTHERN INDIANA

  EXTREME SOUTHWEST MICHIGAN

  LAKE MICHIGAN



* EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 940 PM

  UNTIL 200 AM EDT.



* PRIMARY THREATS INCLUDE...

  SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 50

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 25 MILES WEST OF

VALPARAISO INDIANA TO 40 MILES NORTH NORTHEAST OF FORT WAYNE

INDIANA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU6).



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 233...WW 234...WW 235...



DISCUSSION...A SMALL MCS WITH BOWING CHARACTERISTICS IS ORGANIZING

ACROSS NE IL...AND WILL LIKELY TRACK EWD INTO NRN INDIANA OVER THE

NEXT FEW HOURS.  UP TO 40 KT GRADIENT FLOW IN THE LOW-MIDLEVELS AND

LINGERING MODERATE SURFACE-BASED INSTABILITY WILL SUPPORT THE RISK

OF A FEW DAMAGING GUSTS FOR THE NEXT FEW HOURS...BEFORE THE

CONVECTION BEGINS TO WEAKEN LATER TONIGHT.



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 26035.





...THOMPSON

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