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WWUS20 KWNS 210414

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URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 198

NWS STORM PREDICTION CENTER NORMAN OK

1115 PM CDT MON MAY 20 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  NORTHERN INDIANA

  SOUTHWEST LOWER MICHIGAN

  LAKE MICHIGAN



* EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 1115 PM

  UNTIL 400 AM CDT.



* PRIMARY THREATS INCLUDE...

  SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60

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

SOUTH BEND INDIANA TO 65 MILES SOUTH OF VALPARAISO INDIANA.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU8).



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 193...WW 194...WW

195...WW 196...WW 197...



DISCUSSION...NRN END OF EXTENSIVE MIDWESTERN SQLN EXPECTED TO

CONTINUE ENE ACROSS WW AREA THROUGH EARLY TUE...WHILE STORMS WITHIN

THE LINE MOVE MORE RAPIDLY NEWD ALONG IT. DESPITE

DIURNALLY-STABILIZING BOUNDARY LAYER...AREA VWP DATA AND FCST WIND

FIELDS SUGGEST SOME THREAT FOR SPORADIC DMGG WIND GUSTS.



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

TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

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

MOTION VECTOR 24035.





...CORFIDI

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