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URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 343

NWS STORM PREDICTION CENTER NORMAN OK

820 PM EDT SAT JUN 21 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  CENTRAL AND NORTHERN INDIANA



* EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 820 PM

  UNTIL 100 AM EDT.



* PRIMARY THREATS INCLUDE...

  ISOLATED SIGNIFICANT DAMAGING WIND GUSTS TO 75 MPH POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 40

STATUTE MILES EAST AND WEST OF A LINE FROM 115 MILES SOUTH OF

SOUTH BEND INDIANA TO 15 MILES EAST NORTHEAST OF SOUTH BEND

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 340...WW 341...WW 342...



DISCUSSION...ORGANIZED/BOWING MCS WITH HISTORY OF SVR/DAMAGING WIND

IS FCST TO MOVE SEWD FROM CHICAGO REGION SHORTLY...OUT OF NERN

PORTIONS WW 340.  ACTIVITY SHOULD MOVE OVER NARROW CORRIDOR OF NRN

AND PERHAPS CENTRAL INDIANA CONTAINING FAVORABLE BUOYANCY/MOISTURE

FOR A FEW HOURS...WITH FORWARD-PROPAGATIONAL FORCED ASCENT BEING

MAIN LIFT SOURCE.  ADDITIONAL DAMAGING WIND IS POSSIBLE.



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

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 65

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM

MOTION VECTOR 30030.





...EDWARDS

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