055 
ACUS11 KWNS 081522
SWOMCD
SPC MCD 081521 
ARZ000-MOZ000-081645-

MESOSCALE DISCUSSION 0847
NWS STORM PREDICTION CENTER NORMAN OK
1021 AM CDT THU MAY 08 2003

AREAS AFFECTED...NRN/NERN AR

CONCERNING...TORNADO WATCH 299...

VALID 081521Z - 081645Z

PERSISTENT SUPERCELL OVER VAN BUREN COUNTY CONTINUES ITS EWD
MOVEMENT ALONG WARM FRONT GRADIENT ACROSS CENTRAL PORTIONS OF
WW...WHILE OTHER ACTIVITY IS DEVELOPING AHEAD OF THIS STORM
DOWNSTREAM APPROACHING THE BOOTHEEL OF MO.  PARAMETERS CONTINUE TO
FAVOR SUPERCELL STRUCTURE AND TORNADOES WITH A GRADUAL SHIFT EWD IN
MAIN BODY OF CONVECTION ALONG EXISTING WARM FRONT.

..DARROW.. 05/08/2003

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

ATTN...WFO...PAH...MEG...LZK...

36209263 36549043 35658998 35439180 35509278