

931 

WWUS20 KWNS 082224

SEL1

SPC WW 082224

KYZ000-OHZ000-090300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 51

NWS STORM PREDICTION CENTER NORMAN OK

625 PM EDT SUN MAR 8 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       CENTRAL AND EASTERN KENTUCKY

       CENTRAL OHIO



EFFECTIVE THIS SUNDAY EVENING FROM 625 PM UNTIL 1100 PM 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 55

STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES NORTH

NORTHWEST OF MANSFIELD OHIO TO 45 MILES SOUTHWEST OF LONDON

KENTUCKY.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).



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 50...



DISCUSSION...A STRONG SURFACE LOW OVER SRN LK MI WILL DEVELOP ENEWD

TO THE LOWER GREAT LAKES...WHILE A WARM FRONT LIFTS SLOWLY NWD

ACROSS NRN OH AND A TRAILING SURFACE TROUGH SWEEPS EWD ACROSS

IN/OH/KY THIS EVENING.  A BROKEN BAND OF SEVERE STORMS WILL CONTINUE

TO MOVE EWD IN ADVANCE OF THE SURFACE TROUGH AND NEAR THE WARM

FRONT/TROUGH TRIPLE POINT...WITH A CONTINUED THREAT FOR DAMAGING

WINDS GIVEN RESIDUAL STEEP LOW-LEVEL LAPSE RATES...WEAK

INSTABILITY...AND 50-70 KT WSWLY FLOW IN THE LOW LEVELS.  THE

EARLIER TORNADO THREAT FARTHER W SHOULD GRADUALLY DIMINISH WITH EWD

EXTENT THIS EVENING AS CONVECTION MOVES E OF THE RICHER LOW-LEVEL

MOISTURE AND SOMEWHAT STRONGER WARM SECTOR INSTABILITY.



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 25045.





...THOMPSON

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