

612 

WWUS20 KWNS 182329

SEL5

SPC WW 182329

GAZ000-SCZ000-190600-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 55

NWS STORM PREDICTION CENTER NORMAN OK

730 PM EDT MON MAR 18 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHEAST GEORGIA

       SOUTHERN SOUTH CAROLINA



EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 730 PM UNTIL

200 AM EDT.



HAIL TO 1.5 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 EITHER SIDE OF A LINE FROM 40 MILES NORTH NORTHWEST

OF VIDALIA GEORGIA TO 30 MILES EAST OF SAVANNAH GEORGIA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU5).



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 52...WW 53...WW 54...



DISCUSSION...PRIMARY SEVERE THREAT IS EXPECTED TO TRANSITION TO

DAMAGING WIND AND LARGE HAIL AS SQUALL LINE OVERTAKES FEW REMAINING

SUPERCELLS. DOWNSTREAM ATMOSPHERE IS CHARACTERIZED BY 500-1000 J/KG

MLCAPE AND 40-50 KT EFFECTIVE SHEAR SUPPORTIVE OF ORGANIZED STORMS

INCLUDING LEWP AND BOWING STRUCTURES AS WELL AS EMBEDDED SUPERCELLS

NEXT FEW HOURS.



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

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

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

MOTION VECTOR 27035.





...DIAL



863 

WWUS20 KWNS 182329

SEL5

SPC WW 182329

GAZ000-SCZ000-190600-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 55

NWS STORM PREDICTION CENTER NORMAN OK

730 PM EDT MON MAR 18 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHEAST GEORGIA

       SOUTHERN SOUTH CAROLINA



EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 730 PM UNTIL

200 AM EDT.



HAIL TO 1.5 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 EITHER SIDE OF A LINE FROM 40 MILES NORTH NORTHWEST

OF VIDALIA GEORGIA TO 30 MILES EAST OF SAVANNAH GEORGIA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU5).



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 52...WW 53...WW 54...



DISCUSSION...PRIMARY SEVERE THREAT IS EXPECTED TO TRANSITION TO

DAMAGING WIND AND LARGE HAIL AS SQUALL LINE OVERTAKES FEW REMAINING

SUPERCELLS. DOWNSTREAM ATMOSPHERE IS CHARACTERIZED BY 500-1000 J/KG

MLCAPE AND 40-50 KT EFFECTIVE SHEAR SUPPORTIVE OF ORGANIZED STORMS

INCLUDING LEWP AND BOWING STRUCTURES AS WELL AS EMBEDDED SUPERCELLS

NEXT FEW HOURS.



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

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

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

MOTION VECTOR 27035.





...DIAL

