

156 

WWUS20 KWNS 050220

SEL6

SPC WW 050220

OHZ000-PAZ000-WVZ000-050600-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 466

NWS STORM PREDICTION CENTER NORMAN OK

1020 PM EDT WED JUL 4 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       CENTRAL AND SOUTHERN OHIO

       WESTERN PENNSYLVANIA

       NORTHERN WEST VIRGINIA PANHANDLE



EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 1020 PM

UNTIL 200 AM EDT.



HAIL TO 1.5 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 55

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 20 MILES EAST

SOUTHEAST OF PITTSBURGH PENNSYLVANIA TO 30 MILES WEST OF DAYTON

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

WATCH OUTLINE UPDATE (WOUS64 KWNS WOU6).



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 464...WW 465...



DISCUSSION...LOOSELY ORGANIZED CLUSTERS OF STRONG STORMS HAVE

DEVELOPED ALONG A WSW-ENE BAND IN CNTRL OH.  AREA VWP AND SOUNDING

DATA SUGGEST THAT...GIVEN CURRENT EXTENT OF MERGING COLD

POOLS...SETUP MAY YIELD A SUFFICIENTLY WIDESPREAD THREAT FOR LOCALLY

DMGG WIND AND POSSIBLY SVR HAIL TO WARRANT A WATCH...DESPITE TIME OF

DAY AND ABSENCE OF STRONG FORCING FOR ASCENT.



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

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

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

MOTION VECTOR 33025.





...CORFIDI

