

212 

WWUS20 KWNS 060054

SEL0

SPC WW 060054

KYZ000-OHZ000-TNZ000-VAZ000-WVZ000-060600-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 120

NWS STORM PREDICTION CENTER NORMAN OK

850 PM EDT SUN APR 5 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       EASTERN KENTUCKY

       SOUTHEAST OHIO

       EAST TENNESSEE

       SOUTHWESTERN VIRGINIA

       WESTERN AND CENTRAL WEST VIRGINIA



EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 850 PM UNTIL

200 AM EDT.



HAIL TO 1 INCH 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 EAST AND WEST OF A LINE FROM 15 MILES NORTHEAST OF

PARKERSBURG WEST VIRGINIA TO 20 MILES WEST SOUTHWEST OF KNOXVILLE

TENNESSEE.  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 118...WW 119...



DISCUSSION...BROKEN BANDS OF TSTMS FROM CNTRL KY SSW INTO MIDDLE

TN...EXPECTED TO CONTINUE MAINLY ENE TO THE WRN FOOTHILLS OF THE

CNTRL/SRN APPALCHAINAS LATER THIS EVE AS EWD ACCELERATION OF OH/TN

VLY COLD FRONT ENHANCES LOW LVL UPLIFT.  STORMS WILL ENCOUNTER

REGION LEFT WARM BUT RELATIVELY DRY FROM DOWNSLOPE FLOW EARLIER IN

THE DAY.  COUPLED WITH STRONG HEIGHT FALLS/STRONG WIND FIELD

DOWNSTREAM FROM IL UPR VORT...SETUP COULD CONTINUE TO YIELD

STRUCTURES WITH SVR WINDS...MARGINALLY SVR HAIL...AND POSSIBLY A

BRIEF TORNADO OR TWO.



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

TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS.

A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 400. MEAN STORM MOTION

VECTOR 22050.





...CORFIDI

