

000 

WWUS20 KWNS 301002

SEL8

SPC WW 301002

FLZ000-GAZ000-CWZ000-301700-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 938

NWS STORM PREDICTION CENTER NORMAN OK

500 AM EST SUN NOV 30 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       NORTHERN FLORIDA

       SOUTHERN GEORGIA

       COASTAL WATERS



EFFECTIVE THIS SUNDAY MORNING FROM 500 AM UNTIL NOON EST.



TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS

TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 60 STATUTE

MILES EAST AND WEST OF A LINE FROM 30 MILES NORTH OF VALDOSTA

GEORGIA TO 50 MILES EAST SOUTHEAST OF APALACHICOLA FLORIDA.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU8).



REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR

TORNADOES AND 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.



DISCUSSION...TSTMS ARE EXPECTED TO INTENSIFY THIS MORNING WITHIN

PRE-FRONTAL CONVECTIVE BAND FROM THE NERN GULF OF MEXICO INTO SRN

GA.  WHILE ENVIRONMENT IS FORECAST TO REMAIN ONLY MARGINALLY

UNSTABLE WITH MLCAPE AOB 500 J/KG...INCREASING LARGE-SCALE ASCENT

AHEAD OF AMPLIFYING UPPER TROUGH AND ENHANCED LOW-LEVEL CONVERGENCE

COINCIDENT WITH SUB-SYNOPTIC SCALE LOW DEVELOPING NEWD SHOULD FOCUS

CLUSTERS OF ORGANIZED TSTMS.  GIVEN THE STRONG AMBIENT SHEAR /I.E.

0-1 KM SHEAR OF AROUND 40 KT AND 0-6 KM SHEAR OF 60-65 KT/ AND MOIST

BOUNDARY LAYER CONDITIONS...POTENTIAL WILL EXIST FOR EMBEDDED

SUPERCELL AND BOWING STRUCTURES CAPABLE OF DAMAGING WINDS AND

PERHAPS A TORNADO OR TWO.



AVIATION...TORNADOES AND 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 22045.





...MEAD/THOMPSON

