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753 

WWUS20 KWNS 210147

SEL3

SPC WW 210147

INZ000-MIZ000-OHZ000-LMZ000-210900-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 163

NWS STORM PREDICTION CENTER NORMAN OK

945 PM EDT TUE MAY 20 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  NORTHERN INDIANA

  SOUTHERN LOWER MICHIGAN

  NORTHWESTERN OHIO

  LAKE MICHIGAN



* EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 945 PM

  UNTIL 500 AM EDT.



* PRIMARY THREATS INCLUDE...

  SCATTERED DAMAGING WINDS AND ISOLATED SIGNIFICANT GUSTS TO 75

    MPH POSSIBLE

  ISOLATED VERY LARGE HAIL EVENTS TO 2.5 INCHES IN DIAMETER

    POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60

STATUTE MILES EITHER SIDE OF A LINE FROM 20 MILES WEST OF SOUTH

BEND INDIANA TO 60 MILES EAST NORTHEAST 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 160...WW 161...WW 162...



DISCUSSION...PRIMARY COMPLEX OF SVR TSTMS INITIALLY OVER CHICAGO

METRO AREA IS EXPECTED TO MOVE EWD TO ESEWD OUT OF WW 161 AND ACROSS

NEW WW THROUGH REMAINDER EVENING.  SOME UPSCALE COLD-POOL GROWTH AND

RESULTANT ENHANCEMENT TO WIND-DAMAGE POTENTIAL IS POSSIBLE...IN

ADDITION TO LARGE-HAIL THREAT ALREADY REALIZED DURING PAST COUPLE

HOURS.  REF MESOSCALE DISCUSSION 628 FOR MORE INITIAL DETAILS.  SVR

HAIL AND STG/DAMAGING GUSTS ALSO ARE POSSIBLE WITH ANY CONVECTION

THAT SURVIVES ITS TREK OVER SRN-LM STABLE LAYER.



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

TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 65

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

MOTION VECTOR 28035.





...EDWARDS

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