

783 

WWUS20 KWNS 210503

SEL0

SPC WW 210503

KYZ000-OHZ000-WVZ000-LEZ000-211100-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 20

NWS STORM PREDICTION CENTER NORMAN OK

1200 AM EST FRI FEB 21 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  NORTHEAST KENTUCKY

  CENTRAL AND EASTERN OHIO

  WESTERN WEST VIRGINIA

  LAKE ERIE



* EFFECTIVE THIS FRIDAY MORNING FROM MIDNIGHT UNTIL 600 AM EST.



* PRIMARY THREATS INCLUDE...

  SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  A FEW TORNADOES POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 65

STATUTE MILES EAST AND WEST OF A LINE FROM 45 MILES SOUTHWEST OF

HUNTINGTON WEST VIRGINIA TO 20 MILES NORTH NORTHEAST OF CLEVELAND

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

WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



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...THIS SEVERE THUNDERSTORM WATCH REPLACES

SEVERE THUNDERSTORM WATCH NUMBER 18. WATCH NUMBER 18 WILL NOT BE

IN EFFECT AFTER MIDNIGHT EST. CONTINUE...WW 14...WW 15...WW

16...WW 19...



DISCUSSION...COLD FRONTAL SQLN EXPECTED TO CONTINUE EWD INTO

CNTRL/ERN OH...WHERE WIND PROFILES AND BUOYANCY MAY SUPPORT

ADDITIONAL LEWPS/SMALL BOWS WITH DMGG WIND AND POSSIBLY A TORNADO.

FARTHER S...STORMS ALONG PRE-FRONTAL CONFLUENCE BAND IN NE KY COULD

MAINTAIN CURRENT INTENSITY NEWD INTO SRN OH/WRN WV...DESPITE TIME OF

DAY...AS SECONDARY UPR IMPULSE NOW CROSSING THE OZARKS BEGINS TO

IMPINGE ON REGION. STRENGTHENING WIND FIELD ASSOCIATED WITH

CONTINUED EWD MOTION OF LARGER SCALE UPR TROUGH WILL SUPPORT A RISK

FOR AT LEAST SPORADIC DMGG WIND GUSTS AND POSSIBLY A TORNADO.



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

TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 350. MEAN STORM

MOTION VECTOR 23055.





...CORFIDI

