Tuesday, August 18, 2009

MESO: Mesoscale Discussion 1912

ACUS11 KWNS 182147
SWOMCD
SPC MCD 182146
KSZ000-TXZ000-OKZ000-COZ000-NMZ000-182245-

MESOSCALE DISCUSSION 1912
NWS STORM PREDICTION CENTER NORMAN OK
0446 PM CDT TUE AUG 18 2009

AREAS AFFECTED...ERN CO/NM...WRN KS/OK/TX PANHANDLES

CONCERNING...SEVERE THUNDERSTORM WATCH 709...

VALID 182146Z - 182245Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 709
CONTINUES.

STRONG/SEVERE THUNDERSTORMS WILL GRADUALLY SPREAD ACROSS THE
SRN/CNTRL HIGH PLAINS OF CO/NM INTO WRN KS/OK/TX PANHANDLES OVER THE
NEXT FEW HOURS. NEW SEVERE THUNDERSTORM WATCH WILL LIKELY BE ISSUED
SOON TO ACCOUNT FOR THIS SCENARIO.

SCATTERED SUPERCELLS ACROSS THE HIGH PLAINS...AND AN EVOLVING SQUALL
LINE OVER CO...WILL GRADUALLY SPREAD OFF THE HIGHER TERRAIN TOWARD
GLD/DDC/AMA REGION. ALTHOUGH ONGOING CONVECTION HAS EVOLVED WITHIN
GREATEST INSTABILITY AXIS...AIRMASS DOWNSTREAM REMAINS SUFFICIENTLY
BUOYANT FOR MAINTENANCE OF ROBUST UPDRAFTS GIVEN THE STRONG VERTICAL
SHEAR. ADDITIONALLY...LLJ IS EXPECTED TO INCREASE MARKEDLY ACROSS
THE TX PANHANDLE INTO WRN KS THIS EVENING WHICH FAVORS LONGEVITY
WITH THIS ACTIVITY. LARGE HAIL AND DAMAGING WINDS ARE THE PRIMARY
THREATS.

..DARROW.. 08/18/2009

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

ATTN...WFO...DDC...GLD...AMA...PUB...BOU...ABQ...

LAT...LON 34970354 39940309 39750054 34950126 34970354

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