SWOMCD
SPC MCD 140059
LAZ000-ARZ000-TXZ000-140130-
MESOSCALE DISCUSSION 0393
NWS STORM PREDICTION CENTER NORMAN OK
0759 PM CDT THU MAR 13 2008
AREAS AFFECTED...PARTS OF E TX INTO NRN LA/SRN AR
CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE
VALID 140059Z - 140130Z
WW MAY BE NEEDED ACROSS PART OF E TX INTO NRN LA AND SRN AR.
MOISTURE CONTINUES TO RETURN NWD WITH SLY LOW LEVEL FLOW REGIME
ACROSS E TX INTO LA/SRN AR WITH SURFACE DEWPOINTS IN THE MID 50S TO
AROUND 60. THIS MOISTENING BENEATH STEEP MID LEVEL LAPSE RATES /8+
C/KM/ PER 00Z SHV SOUNDING IS AIDING IN GRADUAL DESTABILIZATION WITH
TIME. THIS TREND IS EXPECTED TO PERSIST AS LLJ STRENGTHENS INTO
LA/AR THIS EVENING. WEAK CAP EVIDENT YET ON THE 00Z SHV SOUNDING
SHOULD BE ERODED SOON BY ADDITIONAL LOW LEVEL MOISTENING AND LARGE
SCALE ASCENT ATTENDANT TO OK/N TX IMPULSE MOVING EWD. AS THIS
PROCESS OCCURS...NEW TSTM DEVELOPMENT WILL BE LIKELY. MARGINAL TO
MODERATE INSTABILITY MAY TEMPER THE NUMBER OF STRONGER TO SEVERE
STORMS...BUT EFFECTIVE BULK SHEAR OF 40-50 KT WILL REMAIN SUPPORTIVE
FOR ORGANIZED STORMS.
.PETERS.. 03/14/2008
..PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...JAN...LZK...LCH...SHV...HGX...FWD...
31079552 32049510 32819439 32839402 32999353 33519346
33819276 33699192 32969160 32369176 31799206 31319263
31049383
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