

922 

WWUS20 KWNS 051932

SEL7

SPC WW 051932

ALZ000-GAZ000-060200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 47

NWS STORM PREDICTION CENTER NORMAN OK

235 PM EST TUE MAR 5 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       EAST CENTRAL ALABAMA

       WESTERN AND NORTHERN GEORGIA



EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 235 PM UNTIL

900 PM EST.



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 85

STATUTE MILES EAST AND WEST OF A LINE FROM 65 MILES NORTHEAST OF

ROME GEORGIA TO 15 MILES SOUTH SOUTHEAST OF AUBURN ALABAMA.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU7).



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...CONVECTION IS INTENSIFYING ALONG THE COLD FRONT IN

CENTRAL AL...AND THIS TREND SHOULD PERSIST THROUGH THE AFTERNOON AS

LOW-LEVEL MOISTENING AND WARMING CONTINUE ACROSS ERN AL INTO GA.

THOUGH INSTABILITY WILL REMAIN SOMEWHAT MARGINAL...STRONG VERTICAL

SHEAR PROFILES WILL SUPPORT A RISK FOR DAMAGING WINDS WITH ORGANIZED

LINE SEGMENTS AND PERHAPS SOME EMBEDDED SUPERCELL STRUCTURES.  THE

TORNADO RISK IS MORE UNCERTAIN GIVEN MARGINAL

MOISTURE/INSTABILITY...THOUGH STRONG LOW-LEVEL SHEAR THIS

AFTERNOON/EVENING MAY SUPPORT AN ISOLATED SPINUP ACROSS GA.

OTHERWISE...MARGINALLY SEVERE HAIL WILL BE POSSIBLE WITH THE

STRONGEST STORMS GIVEN RELATIVELY COOL MIDLEVEL TEMPERATURES AND THE

REMNANTS OF A STEEP LAPSE RATE PLUME FROM THE W.



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 27045.





...THOMPSON



780 

WWUS20 KWNS 051932

SEL7

SPC WW 051932

ALZ000-GAZ000-060200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 47

NWS STORM PREDICTION CENTER NORMAN OK

235 PM EST TUE MAR 5 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       EAST CENTRAL ALABAMA

       WESTERN AND NORTHERN GEORGIA



EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 235 PM UNTIL

900 PM EST.



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 85

STATUTE MILES EAST AND WEST OF A LINE FROM 65 MILES NORTHEAST OF

ROME GEORGIA TO 15 MILES SOUTH SOUTHEAST OF AUBURN ALABAMA.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU7).



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...CONVECTION IS INTENSIFYING ALONG THE COLD FRONT IN

CENTRAL AL...AND THIS TREND SHOULD PERSIST THROUGH THE AFTERNOON AS

LOW-LEVEL MOISTENING AND WARMING CONTINUE ACROSS ERN AL INTO GA.

THOUGH INSTABILITY WILL REMAIN SOMEWHAT MARGINAL...STRONG VERTICAL

SHEAR PROFILES WILL SUPPORT A RISK FOR DAMAGING WINDS WITH ORGANIZED

LINE SEGMENTS AND PERHAPS SOME EMBEDDED SUPERCELL STRUCTURES.  THE

TORNADO RISK IS MORE UNCERTAIN GIVEN MARGINAL

MOISTURE/INSTABILITY...THOUGH STRONG LOW-LEVEL SHEAR THIS

AFTERNOON/EVENING MAY SUPPORT AN ISOLATED SPINUP ACROSS GA.

OTHERWISE...MARGINALLY SEVERE HAIL WILL BE POSSIBLE WITH THE

STRONGEST STORMS GIVEN RELATIVELY COOL MIDLEVEL TEMPERATURES AND THE

REMNANTS OF A STEEP LAPSE RATE PLUME FROM THE W.



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 27045.





...THOMPSON

