SWOMCD
SPC MCD 292129
MSZ000-LAZ000-TXZ000-292300-
MESOSCALE DISCUSSION 2089
NWS STORM PREDICTION CENTER NORMAN OK
0329 PM CST MON NOV 29 2010
AREAS AFFECTED...SERN TX...LA...WRN MS...SERN AR
CONCERNING...TORNADO WATCH 753...
VALID 292129Z - 292300Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 753 CONTINUES.
STRONG/SEVERE STORMS WILL CONTINUE TO AFFECT PORTIONS OF WW 753 THIS
AFTERNOON AND EVENING. CONVECTION IS ALSO FORMING FARTHER EAST INTO
EASTERN LA/SOUTHERN MS...WHERE CONDITIONS WILL CONTINUE TO BE
MONITORED.
THUNDERSTORMS CONTINUE TO INCREASE IN COVERAGE AND INTENSITY ACROSS
THE WESTERN HALF OF WW 753...WITH A RECENT STORM IN WINN PARISH LA
SHOWING STRONG ROTATION AND PRODUCING WIND DAMAGE. THIS STORM IS
INTERACTING WITH THE SURFACE WARM FRONT AT THIS TIME...AND SHOULD
BEGIN TO WEAKEN AS IT TRACKS NORTHEASTWARD INTO A MORE STABLE LOW
LEVEL ENVIRONMENT. HOWEVER...THE THREAT FOR SEVERE STORMS WILL
SPREAD INTO NORTHERN PORTIONS OF THE WATCH LATER THIS AFTERNOON AS
THE WARM FRONT CONTINUES TO LIFT NORTHWARD. POE VAD PROFILE SHOWS
OVER 400 M2/S2 OF 3KM HELICITY...SUGGESTING SUPERCELL STORMS WILL BE
LIKELY AND CAPABLE OF ISOLATED TORNADOES.
FARTHER EAST...DISCRETE SHOWERS HAVE BEGUN TO FORM IN THE AIR MASS
SOUTH OF THE WARM FRONT ACROSS SOUTHEAST LA. LOW LEVEL VERTICAL
SHEAR IS MUCH WEAKER IN THIS AREA COMPARED TO FARTHER WEST...SO
RAPID INTENSIFICATION IS NOT EXPECTED. NEVERTHELESS...THESE STORMS
WILL BE MONITORED FOR INCREASING TRENDS AS THEY INTERACT WITH THE
WARM FRONT CURRENTLY OVER FAR SOUTHERN MS.
..HART.. 11/29/2010
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...MOB...JAN...LIX...LCH...SHV...
LAT...LON 31959323 32779239 32609060 31888911 31178882 30578955
30459097 30159253 30459327 31049369 31959323
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