

581 

WWUS20 KWNS 051950

SEL0

SPC WW 051950

INZ000-OHZ000-LEZ000-060200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 140

NWS STORM PREDICTION CENTER NORMAN OK

350 PM EDT WED MAY 5 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       CENTRAL INDIANA

       NORTHERN OHIO

       LAKE ERIE



EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 350 PM UNTIL

1000 PM EDT.



HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70

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

NORTHWEST OF TERRE HAUTE INDIANA TO 20 MILES NORTH NORTHEAST OF

YOUNGSTOWN OHIO.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).



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.



DISCUSSION...ATMOSPHERE CONTINUES TO DESTABILIZE SOUTH AND EAST OF A

COLD FRONT SITUATED FROM SRN LOWER MI SWWD ACROSS NRN IND AND INTO

CNTRL IL. STORMS ARE EXPECTED TO INCREASE ALONG THE FRONT AND MOVE

EAST ACROSS NRN OH THROUGH THIS EVENING. STRONG 0-6 KM BULK SHEAR OF

30-50 KT WILL SUPPORT A THREAT OF FAST-MOVING SUPERCELLS/PERSISTENT

UPDRAFTS. LARGE HAIL POTENTIAL WILL EXIST WITH INITIAL/DISCRETE

STORMS BEFORE CONVECTION EVOLVES INTO BOWING LINE SEGMENTS CAPABLE

OF LOCALIZED DAMAGING WINDS.



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 400. MEAN STORM

MOTION VECTOR 27035.





...CARBIN

