SWOMCD
SPC MCD 140333
ARZ000-LAZ000-TXZ000-OKZ000-140400-
MESOSCALE DISCUSSION 0396
NWS STORM PREDICTION CENTER NORMAN OK
1033 PM CDT THU MAR 13 2008
AREAS AFFECTED...SERN OK/NERN TX INTO CENTRAL/SRN AR AND NRN LA
CONCERNING...SEVERE THUNDERSTORM WATCH 109...
VALID 140333Z - 140400Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 109
CONTINUES.
NEW WW WILL BE NEEDED SOON TO REPLACE WW 109 AS SEVERE WEATHER
THREAT FOR THE LATE EVENING/OVERNIGHT PERIOD CONTINUES TO SHIFT
ACROSS SERN OK/NERN TX INTO CENTRAL/SRN AR AND NRN LA.
MID-LATE EVENING WATER VAPOR IMAGERY SHOWED A SHORT WAVE TROUGH HAS
NOW MOVED INTO ERN OK/NERN TX...WITH MID/UPPER LEVEL FLOW VEERING TO
WLY AS FAR EAST AS SWRN AR AT 03Z. THE VEERED FLOW ALOFT COMBINED
WITH SWLY LLJ EXTENDING FROM NERN TX TO CENTRAL AR AND STRONG
EFFECTIVE BULK SHEAR VALUES ARE SUPPORTING A CONTINUED POTENTIAL FOR
ROTATING UPDRAFTS. THERMODYNAMIC PROFILES WITH COLD MID LEVEL
TEMPERATURES/STEEP LAPSE RATES WILL CONTINUE TO FAVOR LARGE HAIL AS
THE PRIMARY THREAT. HOWEVER...ANY DISCRETE STORM WITH DEVIANT
MOTION MAY CONTINUE TO POSE AN ISOLATED TORNADO THREAT INTO THE
OVERNIGHT PERIOD.
.PETERS.. 03/14/2008
..PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...JAN...LZK...SHV...TSA...FWD...
32849619 33519580 34349557 35089489 35399362 35309236
34849186 33779161 32689186 32169269 31849418 31609525
31859602
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