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000 

WWUS20 KWNS 011715

SEL8

SPC WW 011715

ALZ000-GAZ000-NCZ000-TNZ000-020100-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 468

NWS STORM PREDICTION CENTER NORMAN OK

1210 PM CDT SUN JUL 1 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHERN AND EASTERN ALABAMA

       NORTHERN AND CENTRAL GEORGIA

       FAR WESTERN NORTH CAROLINA

       SOUTHERN MIDDLE AND EASTERN TENNESSEE



EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 1210 PM UNTIL

800 PM CDT.



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 75

STATUTE MILES EITHER SIDE OF A LINE FROM 45 MILES NORTHWEST OF

HUNTSVILLE ALABAMA TO 50 MILES SOUTH OF ATHENS GEORGIA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU8).



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.



DISCUSSION...TSTMS ARE STRENGTHENING ATTM OVER MIDDLE TN ALONG GUST

FRONT LEFT FROM OVERNIGHT STORMS IN W TN.  OTHER STORMS ARE FORMING

ALONG SEGMENT OF WEAK COLD FRONT OVER SRN EAST TN AND OVER THE

MOUNTAINS OF N GA.  STEEP LOW LEVEL LAPSE RATES AND HI PWS WILL BE

SUPPORTIVE OF WET MICROBRUSTS.  VWP DATA SHOW WEAK UNIDIRECTIONAL

NNW FLOW IN THE 850-700 MB LAYER.  COUPLED WITH AXIS OF STRONGEST

LOW LVL HEATING/CONFLUENCE ALONG AND AHEAD OF FRONT...STORMS SHOULD

MOVE/DEVELOP MAINLY SE...AND MAY ORGANIZE INTO ONE OR TWO SHORT

BANDS.



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 550. MEAN STORM MOTION

VECTOR 30020.





...CORFIDI

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