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WWUS20 KWNS 141635

SEL0

SPC WW 141635

KYZ000-TNZ000-VAZ000-150000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 170

NWS STORM PREDICTION CENTER NORMAN OK

1135 AM CDT FRI MAY 14 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       MUCH OF SOUTHERN AND EASTERN KENTUCKY

       MUCH OF MIDDLE AND PARTS OF NORTHEASTERN TENNESSEE

       PARTS OF WESTERN VIRGINIA



EFFECTIVE THIS FRIDAY MORNING AND EVENING FROM 1135 AM UNTIL 700

PM CDT.



HAIL TO 2.5 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 60

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 65 MILES SOUTH

SOUTHWEST OF CLARKSVILLE TENNESSEE TO 35 MILES SOUTH SOUTHEAST OF

HUNTINGTON WEST VIRGINIA.  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.



OTHER WATCH INFORMATION...CONTINUE...WW 169...



DISCUSSION...HEATING HAS INCREASED INSTABILITY TO AOA 3000 J/KG WITH

LITTLE REMAINING CIN. WITH 35-40 OF DEEP LAYER SHEAR...STORMS WILL

DEVELOP RAPIDLY ACROSS THE WATCH AREA. PRIMARY THREAT WILL BE LARGE

HAIL AND DAMAGING WINDS...PARTICULARLY WITH ANY ROTATING STORMS THAT

DEVELOP AND/OR LINE SEGMENTS



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

TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM

MOTION VECTOR 24025.





...HALES

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