SWOMCD
SPC MCD 132334
ARZ000-MOZ000-140030-
MESOSCALE DISCUSSION 0391
NWS STORM PREDICTION CENTER NORMAN OK
0634 PM CDT THU MAR 13 2008
AREAS AFFECTED...PARTS OF CENTRAL AND NRN AR
CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY
VALID 132334Z - 140030Z
TSTMS WILL SPREAD ENEWD INTO CENTRAL/NRN AR THIS EVENING...BUT
SEVERE THREAT SHOULD DECREASE WITH EWD EXTENT AWAY FROM WW 109.
EARLY EVENING SURFACE ANALYSES INDICATED SLOW MOISTENING TO THE EAST
OF WW 109...YET DEWPOINTS CONTINUE TO BE LOWER THAN VALUES FARTHER
WEST INTO SWRN AR/ERN OK. BROKEN LINE OF TSTMS LOCATED IN WRN AR IS
ALONG ERN EXTENT OF EML WHERE ASCENT WITH OK/N TX IMPULSE IS AIDING
IN CONVECTIVE DEVELOPMENT. HOWEVER...AS THIS ACTIVITY CONTINUES TO
MOVE E AWAY FROM THE GREATER INSTABILITY/MOIST AXIS...OVERALL SEVERE
THREAT...ESPECIALLY WITH RESPECT TO HAIL...IS EXPECTED TO DIMINISH.
LOCALIZED STRONGER WIND GUSTS MAY BE THE MAIN THREAT GIVEN CURRENT
SURFACE DEWPOINT DEPRESSIONS OF 30-40 DEGREES...BUT THIS THREAT
SHOULD ALSO DIMINISH WITH EWD EXTENT AS BOUNDARY LAYER COOLS GIVEN
LOSS OF DAY TIME HEATING.
.PETERS.. 03/13/2008
..PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...MEG...LZK...SGF...
34679313 35469321 36519280 36719269 36649154 35979086
34769130 34159155 34309314
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