SWOMCD
SPC MCD 170813
ALZ000-MSZ000-LAZ000-170845-
MESOSCALE DISCUSSION 0251
NWS STORM PREDICTION CENTER NORMAN OK
0213 AM CST SUN FEB 17 2008
AREAS AFFECTED...SERN LA AND SRN MS
CONCERNING...SEVERE THUNDERSTORM WATCH 60...
VALID 170813Z - 170845Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 60
CONTINUES.
TORNADO WATCH MAY BE NEEDED SHORTLY ACROSS SERN LA AND SRN MS.
AS UPPER LOW/TROUGH...NOW CENTERED OVER OK...CONTINUES TO MOVE NE
TOWARD MO AND REMAINS N OF THE LOWER MS VALLEY...WSR-88D VWPS
INDICATED A WEAKENING OF THE LINEAR FORCING ALONG THE SQUALL LINE.
THIS APPEARS TO BE VERIFIED BY RECENT DISCRETE STORM DEVELOPMENT
JUST AHEAD OF THE SQUALL LINE IN SOUTH CENTRAL LA AND NWD INTO SWRN
MS...AND ALSO REGIONAL RADARS INDICATING DISCRETE DEVELOPMENT ALONG
THE LINE ITSELF. LOW LEVEL AIR MASS CONTINUED TO MOISTEN AND 00Z
GFS SHOWED THIS TREND MAY CONTRIBUTE TO DIMINISHING SURFACE BASED
INHIBITION FOR STORMS TO BECOME SURFACE BASED AND REALIZE STRONGER
LOW LEVEL SHEAR FOR INCREASED TORNADO THREAT ACROSS SERN LA AND SRN
MS.
.PETERS.. 02/17/2008
..PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...MOB...JAN...LIX...LCH...
29129245 30209180 31619153 32409106 32368849 30158807
28638862
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