[MCD] SWOMCD

[Mesoscale Convective Discussions]

ACUS11 KWNS 312310
SWOMCD
SPC MCD 312310 
LAZ000-010045-

MESOSCALE DISCUSSION 2370
NWS STORM PREDICTION CENTER NORMAN OK
0510 PM CST MON OCT 31 2005

AREAS AFFECTED...NRN LA THROUGH EXTREME SRN AR

CONCERNING...SEVERE THUNDERSTORM WATCH 839...

VALID 312310Z - 010045Z

THREAT FOR MAINLY ISOLATED DAMAGING WIND WILL PERSIST ANOTHER HOUR
OR SO AS SQUALL LINE CONTINUES EWD THROUGH NRN LA. HOWEVER...THIS
PART OF THE SQUALL LINE SHOULD UNDERGO A WEAKENING TREND AS IT MOVES
INTO NERN LA. STORMS WILL LIKELY MOVE OUT OF OR WEAKEN WITHIN WW 839
BEFORE ITS EXPIRATION TIME OF 02Z.

EARLY THIS EVENING A SQUALL LINE EXTENDS FROM N CNTRL LA SWWD
THROUGH SERN TX MOVING SEWD AT 30 KT. STRONGEST PORTION OF THE LINE
NEXT COUPLE HOURS IS EXPECTED TO REMAIN ALONG THE TX COAST AND INTO
SWRN LA WHERE STRONGER INSTABILITY EXISTS. FARTHER N ACROSS NRN
LA...THE LINE WILL ENCOUNTER INCREASINGLY MARGINAL INSTABILITY AS IT
MOVES EWD. MOREOVER...THE STRONGER LOW LEVEL JET IS EXPECTED TO
DEVELOP NEWD TOWARD THE TN AND OH VALLEYS THIS EVENING WITH ONLY
MODEST LOW LEVEL FLOW PERSISTING OVER THE LOWER MS VALLEY. GIVEN
THESE LIMITING FACTORS...A GRADUAL DECREASE IN INTENSITY IS EXPECTED
ALONG THE NRN PORTION OF THE LINE AS IT CONTINUES EWD THROUGH NRN
LA.

..DIAL.. 10/31/2005

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

ATTN...WFO...JAN...LCH...SHV...

32529163 31439210 31409354 32809212 

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