

242 

WWUS20 KWNS 251553

SEL3

SPC WW 251553

KYZ000-MDZ000-OHZ000-PAZ000-WVZ000-LEZ000-260000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 103

NWS STORM PREDICTION CENTER NORMAN OK

1155 AM EDT SUN APR 25 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTH-CENTRAL KENTUCKY

       EXTREME WESTERN MARYLAND

       CENTRAL AND EASTERN OHIO

       WESTERN PENNSYLVANIA

       NORTHERN AND CENTRAL WEST VIRGINIA

       LAKE ERIE



EFFECTIVE THIS SUNDAY MORNING AND EVENING FROM 1155 AM UNTIL 800

PM 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 110

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 50 MILES WEST OF

COLUMBUS OHIO TO 40 MILES NORTHEAST OF MORGANTOWN WEST VIRGINIA.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU3).



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...BANDS OF TSTMS WILL CONT TO FORM THROUGH THE AFTN AHEAD

OF AN EJECTING MID-LEVEL SHORT WAVE TROUGH.  DEEP LAYER SHEAR OF

40-45 KTS AND MLCAPES TO 1500 J/KG WILL BE FAVORABLE FOR ORGANIZED

STORMS INCLUDING SUPERCELLS AND BOWING LINE SEGMENTS.



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 450. MEAN STORM

MOTION VECTOR 23035.





...RACY/HALES

