Tuesday, May 18, 2010

MESO: Mesoscale Discussion 0604

ACUS11 KWNS 180623
SWOMCD
SPC MCD 180623
TXZ000-180800-

MESOSCALE DISCUSSION 0604
NWS STORM PREDICTION CENTER NORMAN OK
0123 AM CDT TUE MAY 18 2010

AREAS AFFECTED...SOUTH TX

CONCERNING...SEVERE THUNDERSTORM WATCH 183...

VALID 180623Z - 180800Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 183
CONTINUES.

CONVECTIVE OUTFLOW CONTINUES TO GRADUALLY SAG SWD ACROSS SEVERE
WW#183. MUCH OF THE EARLIER THUNDERSTORM ACTIVITY HAS DECREASED IN
INTENSITY EAST OF I-35...HOWEVER AN UPWARD EVOLVING MCS IS NOTED
ALONG/JUST NORTH OF OUTFLOW FROM DIMMIT COUNTY...NWWD INTO NRN
MEXICO SOUTH OF DRT. IT APPEARS THE MCS MAY BE AIDED IN PART DUE TO
A WEAK SHORTWAVE TROUGH LOCATED JUST UPSTREAM OF THIS DEEP
CONVECTION. LATEST THINKING IS THE MCS WILL CONTINUE ITS SEWD
MOVEMENT ALONG THE RIO GRANDE VALLEY...ENHANCED BY A WEAK LLJ THAT
SHOULD PROVIDE ADDITIONAL INFLOW FOR FORWARD PROPAGATING CLUSTERS.
MOVEMENT IS NOT PARTICULARLY FAST BUT ISOLATED SEVERE HAIL COULD
ACCOMPANY AN OTHERWISE HEAVY RAIN-PRODUCING SYSTEM.

..DARROW.. 05/18/2010

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

ATTN...WFO...CRP...EWX...BRO...

LAT...LON 29400019 28309870 27339841 27149965 28680152 29400019

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