SWOMCD
SPC MCD 020842
MSZ000-LAZ000-021015-
MESOSCALE DISCUSSION 2202
NWS STORM PREDICTION CENTER NORMAN OK
0342 AM CDT TUE SEP 02 2008
AREAS AFFECTED...CNTRL AND SRN MS THROUGH SE LA
CONCERNING...TORNADO WATCH 880...
VALID 020842Z - 021015Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 880 CONTINUES.
THREAT FOR ISOLATED TORNADOES WILL PERSIST THROUGH THE EARLY MORNING
MAINLY FROM SE LA THROUGH SRN AND CNTRL MS. WW 880 MIGHT BE EXPANDED
TO INCLUDE COUNTIES FARTHER NORTH IN CNTRL MS.
EARLY THIS MORNING THE CENTER OF TROPICAL STORM GUSTAV WAS OVER W
CNTRL LA MOVING NWWD. SEE LATEST ADVISORIES FROM NHC FOR FURTHER
DETAILS ON THIS STORM. VERY LARGE HODOGRAPHS EXIST EAST OF CENTER
FROM ERN LA THROUGH MS WITH 0-1 KM HELICITIES FROM 400-600 M2/S2.
GREATEST TORNADO THREAT NEXT SEVERAL HOURS WILL PERSIST FROM SE LA
THROUGH CNTRL MS IN ASSOCIATION WITH DISCRETE CELLS EMBEDDED WITHIN
THE OUTER RAINBANDS.
NRN END OF OUTER RAINBAND EXTENDING FROM SE MS NWD TO SCOTT COUNTY
IN CNTRL MS IS APPROACHING THE NRN EDGE OF WW 880. INSTABILITY IS
WEAKER WITH NWD EXTENT. HOWEVER...PERSISTENT INFLUX OF HIGHER
THETA-E AIR FROM THE GULF SUGGESTS THE THERMODYNAMIC ENVIRONMENT MAY
EVENTUALLY BECOME SUFFICIENT FOR STORMS TO SURVIVE FARTHER NWD INTO
MS...IN WHICH CASE COUNTIES WOULD NEED TO BE ADDED TO NRN END OF WW.
..DIAL.. 09/02/2008
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...MOB...JAN...LIX...
31059154 32239097 33069026 32988919 32348885 30658898
29998955 30289095
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