SWOMCD
SPC MCD 180317
OKZ000-TXZ000-180445-
MESOSCALE DISCUSSION 2187
NWS STORM PREDICTION CENTER NORMAN OK
1017 PM CDT SAT SEP 17 2011
AREAS AFFECTED...NW TX INTO OK
CONCERNING...SEVERE THUNDERSTORM WATCH 850...851...
VALID 180317Z - 180445Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH
850...851...CONTINUES.
STORMS OVER NRN OK MERGED INTO AN MCS...AND CONTINUE TO SURGE SEWD
INTO A MUCH COOLER AND MORE STABLE AIR MASS. A SLY LOW LEVEL JET IS
HELPING TO MAINTAIN AN ELEVATED FEED OF MOISTURE...WITH STORM CORES
THE STRONGEST ON THE WRN FRINGE OF THIS CLUSTER. LARGE HAIL WILL BE
POSSIBLE WITH THE WRN CELLS.
TO THE S...ISOLATED SEVERE STORMS PERSIST NEAR THE RED RIVER. THESE
STORMS WILL HAVE BETTER ACCESS TO THE WARM SECTOR AND MAY PERSIST
FOR A COUPLE HOURS WITH A LARGE HAIL THREAT.
OVERALL...THE SEVERE THREAT IS EXPECTED TO REMAIN ISOLATED WITH
MAINLY HAIL...AND THE WATCHES WILL BE ALLOWED TO EXPIRE AT 04Z.
..JEWELL.. 09/18/2011
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...TSA...FWD...OUN...
LAT...LON 34169562 33259663 33179773 33509809 34759760 36439757
36699597 36249523 35619475 35159504 34169562
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