

409 

WWUS20 KWNS 132259

SEL0

SPC WW 132259

ALZ000-KYZ000-MSZ000-TNZ000-140600-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 300

NWS STORM PREDICTION CENTER NORMAN OK

555 PM CDT FRI MAY 13 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHERN AND WESTERN ALABAMA

       WESTERN AND CENTRAL KENTUCKY

       NORTHERN AND CENTRAL MISSISSIPPI

       WESTERN AND MIDDLE TENNESSEE



EFFECTIVE THIS FRIDAY AFTERNOON AND SATURDAY MORNING FROM 555 PM

UNTIL 100 AM CDT.



HAIL TO 2 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 EAST AND WEST OF A LINE FROM OWENSBORO KENTUCKY TO

95 MILES SOUTH SOUTHWEST OF COLUMBUS MISSISSIPPI.  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 297...WW 298...WW 299...



DISCUSSION...SCTD BROKEN BANDS OF TSTMS EXPECTED TO CONTINUE

MOVING/DEVELOPING GENERALLY E ACROSS WRN KY AND WRN TN THROUGH EARLY

TONIGHT...WHILE MORE REGENERATIVE STORMS PERSIST IN NRN/ERN MS.  THE

MORE NRN STORMS MAY CONTAIN SMALL BOWING SEGMENTS WITH LOCALLY DMGG

WIND AND SOME HAIL.  SUSTAINED UPDRAFTS/POSSIBLE SUPERCELLS MAY

OCCUR IN MS...WHERE FORCING FOR ASCENT AND WIND FIELD WILL INCREASE

WITH CONTINUED EWD MOVEMENT OF VORT LOBE ASSOCIATED WITH MO UPR LOW.

GIVEN THE POTENTIAL FOR FORTUITOUS STORM-BOUNDARY INTERACTIONS...THE

MS STORMS MAY YIELD A TORNADO...ALTHOUGH THE OVERALL THREAT APPEARS

TOO LOW TO WARRANT A TORNADO WW ATTM.  MOST OF THE STORMS SHOULD

WEAKEN BY LATE EVE.



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

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 25025.





...CORFIDI

