

599 

WWUS20 KWNS 052333

SEL4

SPC WW 052333

LAZ000-MSZ000-CWZ000-060700-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 674

NWS STORM PREDICTION CENTER NORMAN OK

530 PM CST MON NOV 5 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHERN LOUISIANA

       FAR SOUTHERN MISSISSIPPI

       COASTAL WATERS



EFFECTIVE THIS MONDAY AFTERNOON AND TUESDAY MORNING FROM 530 PM

UNTIL 100 AM CST.



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 NORTH AND SOUTH OF A LINE FROM 40 MILES WEST

NORTHWEST OF INTRACOASTAL CITY LOUISIANA TO 70 MILES SOUTHEAST OF

GULFPORT MISSISSIPPI.  FOR A COMPLETE DEPICTION OF THE WATCH SEE

THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).



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 673...



DISCUSSION...TSTMS...INCLUDING POSSIBLE SUPERCELLS...EXPECTED TO

INCREASE IN COVERAGE/STRENGTH OVER THE CNTRL GULF CST REGION THIS

EVE. THIS WILL OCCUR AS MODERATE HEIGHT FALLS/DCVA ASSOCIATED WITH

AMPLIFYING AR UPR VORT OVERSPREAD MOIST AXIS ALONG AND S OF DIFFUSE

W-E FRONT STALLED OVER WW REGION. AMPLE...LARGELY UNIDIRECTIONAL

CLOUD-LAYER SHEAR WILL EXIST FOR SUSTAINED STORMS...SOME OF WHICH

MAY PRODUCE SVR HAIL. EXPECTED DISCRETE TO SEMI-DISCRETE STORM MODE

ALSO MAY ENHANCE POTENTIAL FOR LOW-LVL STORM ROTATION AND AN ISOLD

TORNADO. HOWEVER...LOW-LVL WIND FIELD AND DIRECTIONAL SHEAR SHOULD

REMAIN TOO WEAK TO POSE A MORE WIDESPREAD TORNADO THREAT.



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 450. MEAN STORM

MOTION VECTOR 29030.





...CORFIDI



549 

WWUS20 KWNS 052333

SEL4

SPC WW 052333

LAZ000-MSZ000-CWZ000-060700-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 674

NWS STORM PREDICTION CENTER NORMAN OK

530 PM CST MON NOV 5 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHERN LOUISIANA

       FAR SOUTHERN MISSISSIPPI

       COASTAL WATERS



EFFECTIVE THIS MONDAY AFTERNOON AND TUESDAY MORNING FROM 530 PM

UNTIL 100 AM CST.



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 NORTH AND SOUTH OF A LINE FROM 40 MILES WEST

NORTHWEST OF INTRACOASTAL CITY LOUISIANA TO 70 MILES SOUTHEAST OF

GULFPORT MISSISSIPPI.  FOR A COMPLETE DEPICTION OF THE WATCH SEE

THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).



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 673...



DISCUSSION...TSTMS...INCLUDING POSSIBLE SUPERCELLS...EXPECTED TO

INCREASE IN COVERAGE/STRENGTH OVER THE CNTRL GULF CST REGION THIS

EVE. THIS WILL OCCUR AS MODERATE HEIGHT FALLS/DCVA ASSOCIATED WITH

AMPLIFYING AR UPR VORT OVERSPREAD MOIST AXIS ALONG AND S OF DIFFUSE

W-E FRONT STALLED OVER WW REGION. AMPLE...LARGELY UNIDIRECTIONAL

CLOUD-LAYER SHEAR WILL EXIST FOR SUSTAINED STORMS...SOME OF WHICH

MAY PRODUCE SVR HAIL. EXPECTED DISCRETE TO SEMI-DISCRETE STORM MODE

ALSO MAY ENHANCE POTENTIAL FOR LOW-LVL STORM ROTATION AND AN ISOLD

TORNADO. HOWEVER...LOW-LVL WIND FIELD AND DIRECTIONAL SHEAR SHOULD

REMAIN TOO WEAK TO POSE A MORE WIDESPREAD TORNADO THREAT.



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 450. MEAN STORM

MOTION VECTOR 29030.





...CORFIDI

