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945 

WWUS20 KWNS 111819

SEL8

SPC WW 111819

OHZ000-PAZ000-WVZ000-120200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 628

NWS STORM PREDICTION CENTER NORMAN OK

215 PM EDT MON JUL 11 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHEAST OHIO

       SOUTHWEST PENNSYLVANIA

       WEST VIRGINIA



EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 215 PM UNTIL

1000 PM EDT.



HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 75

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



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 75

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 35 MILES NORTH

NORTHWEST OF HUNTINGTON WEST VIRGINIA TO 30 MILES SOUTHEAST OF

MORGANTOWN WEST VIRGINIA.  FOR A COMPLETE DEPICTION OF THE WATCH

SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).



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 627...



DISCUSSION...LINE OF SEVERE STORMS IS MOVING ESEWD OVER CENTRAL OH.

AIR MASS OVER SRN OH INTO WV IS CONTINUING TO HEAT AND DESTABILIZE

WITH MLCAPE OF 1500-2500 J/KG ALONG ERN PORTION OF THE INSTABILITY

AXIS THAT EXTENDS ACROSS THE OH VALLEY.  A WELL-DEFINED COLD POOL

AND INCREASINGLY NWLY MID LEVEL WINDS INDICATE CONVECTIVE SYSTEM

WILL PROPAGATE MORE SEWD WITH TIME AND MAINTAIN THREAT FOR DAMAGING

WINDS AND OCCASIONAL HAIL.



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

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 65

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

MOTION VECTOR 29025.





...WEISS

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