SWOMCD
SPC MCD 190244
ALZ000-MSZ000-LAZ000-190315-
MESOSCALE DISCUSSION 0664
NWS STORM PREDICTION CENTER NORMAN OK
0944 PM CDT FRI APR 18 2008
AREAS AFFECTED...FAR SERN MS/FAR SERN LA
CONCERNING...TORNADO WATCH 207...
VALID 190244Z - 190315Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 207 CONTINUES.
WW 207 COULD BE EXTENDED LOCALLY ACROSS MAINLY FAR SERN MS.
LOW LEVEL AND DEEP LAYER SHEAR VALUES REMAIN FAVORABLE FOR A
CONTINUED TORNADO THREAT IN VALID PART OF WW 207 ACROSS FAR SERN MS
AND FAR SERN LA. ALTHOUGH SURFACE WINDS ACROSS FAR SERN MS HAVE
BEGUN TO VEER TO SSWLY...LOW LEVEL SRH VALUES IN EXCESS OF 200 M2/S2
REMAIN FAVORABLE FOR LOW LEVEL STORM ROTATION AND ATTENDANT TORNADO
POTENTIAL WITH ANY SUSTAINED UPDRAFTS AS CURRENTLY INDICATED BY
LOCAL RADARS IN FAR SERN MS /HARRISON TO GEORGE/GREENE COUNTIES MS/.
THIS THREAT IS EXPECTED TO PERSIST UNTIL THE ACTIVITY MOVES
COMPLETELY INTO SWRN AL...WITH RADAR TRENDS SUGGESTING THIS WILL BE
AFTER 03Z. THEREFORE...LOCAL EXTENSION OF WW 207 APPEARS WARRANTED.
..PETERS.. 04/19/2008
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...MOB...LIX...
29278965 29808983 31488850 31418840 29858833 29028871
28598913
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