MESO: Mesoscale Discussion 0559

ACUS11 KWNS 042202
SWOMCD
SPC MCD 042202
GAZ000-FLZ000-ALZ000-MSZ000-LAZ000-042330-

MESOSCALE DISCUSSION 0559
NWS STORM PREDICTION CENTER NORMAN OK
0502 PM CDT FRI APR 04 2008

AREAS AFFECTED...SERN LA/SRN MS/SRN AL/WRN FL PANHANDLE

CONCERNING...TORNADO WATCH 164...

VALID 042202Z - 042330Z

THE SEVERE WEATHER THREAT FOR TORNADO WATCH 164 CONTINUES.

SEVERE/ISOLATED TORNADO THREAT CONTINUES ACROSS PARTS OF WW 164.
WITH THIS WATCH SCHEDULED TO EXPIRE AT 04/23Z...NEW TORNADO WATCH
WILL LIKELY BE REQUIRED FROM SERN LA ACROSS THE CENTRAL GULF COAST
REGION.

LATEST RADAR IMAGERY SHOWS STORM COVERAGE INCREASING NEAR AND S OF
SEWD-MOVING COLD FRONT...WHICH NOW EXTENDS FROM A LOW OVER NERN AL
SWWD ACROSS SERN MS AND INTO SWRN LA. BOUNDARY LAYER REMAINS MOIST
S OF THIS FRONT WITH DEWPOINTS GENERALLY IN THE 60S...WHICH IS
CONTRIBUTING TO 500 TO 1500 J/KG MIXED-LAYER CAPE.

WHILE STRONGEST DEEP-LAYER SHEAR SHOULD SHIFT GRADUALLY EWD WITH
TIME AS THE LOW-LEVEL JET REDEVELOPS EWD INTO ERN AL/GA/THE
CAROLINAS...50 TO 60 KT SWLY MID-LEVEL FLOW SHOULD PERSIST ACROSS
THE CENTRAL GULF COAST/LOWER MS VALLEY REGION THROUGH THE
EVENING...SUPPORTING A CONTINUED THREAT FOR ORGANIZED/SEVERE STORMS.
WHILE GREATER TORNADO THREAT WILL LIKELY SHIFT EWD IN CONJUNCTION
WITH THE LOW-LEVEL JET...HAIL AND LOCALLY-DAMAGING WINDS AND THE
THREAT FOR AN ISOLATED TORNADO OR TWO -- ESPECIALLY OVER THE NEXT
COUPLE OF HOURS -- WILL LIKELY NECESSITATE NEW WW ISSUANCE.

.GOSS.. 04/04/2008

..PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...FFC...TAE...BMX...MOB...JAN...LIX...LCH...

29509136 30179178 31199150 32968626 32478510 31208488
29168922

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