SWOMCD
SPC MCD 292253
ARZ000-LAZ000-TXZ000-OKZ000-300000-
MESOSCALE DISCUSSION 0636
NWS STORM PREDICTION CENTER NORMAN OK
0553 PM CDT WED APR 29 2009
AREAS AFFECTED...N CNTRL/NERN TX INTO SWRN AR/NWRN LA
CONCERNING...SEVERE THUNDERSTORM WATCH 212...
VALID 292253Z - 300000Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 212
CONTINUES.
PRIMARY THREATS OF DMGG WINDS AND HEAVY RAINFALL WILL CONTINUE
ACROSS WW212. AREAS IMMEDIATELY DOWNSTREAM ARE BEING MONITORED...AND
ADDITIONAL COUNTIES MAY NEED TO BE ADDED TO THE WATCH.
LONG LIVED MCS IS SLOWLY PROPAGATING TO THE S AND E TOWARDS MODERATE
INSTABILITY. ATTM...PRIMARY SEVERE THREAT APPEARS LIKELY ACROSS ERN
PORTIONS OF THE WW...WHERE MORE LINEAR ORGANIZATION IS NOTED. BRIEF
DEVELOPMENT OF ADDITIONAL STORMS ALONG THE OUTFLOW...NOW SLIGHTLY
AHEAD OF THE MAIN CONVECTIVE LINE...HAS BEEN OBSERVED. STORMS THAT
CAN DEVELOP ALONG AND AHEAD OF THE OUTFLOW BEFORE BEING ABSORBED
INTO THE MAIN CONVECTION MAY HAVE BRIEF ROTATION...AND PRODUCE DMGG
WINDS AHEAD OF THE LINE. COUNTIES ALONG THE EXTREME NRN PORTION OF
THE WW IN A RAIN COOLED AIRMASS WILL LIKELY BE CLEARED
SHORTLY...WHILE COUNTIES IMMEDIATELY DOWNSTREAM OF THE MCS WILL BE
MONITORED FOR A POSSIBLE AREAL EXTENTION.
..HURLBUT.. 04/29/2009
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...LZK...SHV...FWD...OUN...
LAT...LON 32809350 32379481 32589626 33129792 33589835 33939768
33729617 33449474 34469354 34199292 33109315 32809350
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