SWOMCD
SPC MCD 140250
ARZ000-LAZ000-TXZ000-OKZ000-140345-
MESOSCALE DISCUSSION 0395
NWS STORM PREDICTION CENTER NORMAN OK
0950 PM CDT THU MAR 13 2008
AREAS AFFECTED...SERN OK INTO NERN TX/SWRN AR
CONCERNING...SEVERE THUNDERSTORM WATCH 109...
VALID 140250Z - 140345Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 109
CONTINUES.
LARGE HAIL THREAT INCREASING ACROSS SERN OK INTO NERN TX. AN
ISOLATED TORNADO WILL ALSO BE POSSIBLE.
TSTMS HAVE RAPIDLY INCREASED IN INTENSITY DURING THE LAST HALF HOUR
/SINCE 0210Z/ FROM PUSHMATAHA COUNTY TO NRN LE FLORE COUNTY IN OK
WITH NEW STORMS DEVELOPING IN SWRN PART OF WW 109 IN NE TX. THE
ACTIVITY IN SERN OK APPEARS TO BE LOCATED ALONG A LOW LEVEL
CONFLUENCE ZONE AROUND 850 MB. MODERATE INSTABILITY...STEEP MID
LEVEL LAPSE RATES AND EFFECTIVE BULK SHEAR OF 30-50 KT WILL MAINTAIN
POTENTIAL FOR ROTATING UPDRAFTS WITH ATTENDANT THREATS FOR MAINLY
LARGE HAIL AND STRONG WIND GUSTS. DISCRETE STORMS THAT SHOW DEVIANT
STORM MOTION...SUCH AS THE ONE CURRENTLY IN PUSHMATAHA COUNTY...MAY
PRODUCE A TORNADO PRIOR TO FURTHER DECOUPLING OF THE BOUNDARY LAYER.
.PETERS.. 03/14/2008
..PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...LZK...SHV...TSA...FWD...OUN...
32939634 33769635 34109589 34619556 35189501 35339462
35289412 34899317 33949350 33049343 32889423
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