SWOMCD
SPC MCD 122257
WIZ000-MNZ000-SDZ000-130000-
MESOSCALE DISCUSSION 1660
NWS STORM PREDICTION CENTER NORMAN OK
0557 PM CDT THU AUG 12 2010
AREAS AFFECTED...ERN SD...SRN/CNTRL MN
CONCERNING...TORNADO WATCH 603...
VALID 122257Z - 130000Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 603 CONTINUES.
A FEW SUPERCELL STRUCTURES ARE FINALLY STRENGTHENING BENEATH/WITHIN
TRANSITORY BAND OF ELEVATED CONVECTION ALONG THE SD/MN BORDER.
ADDITIONALLY...A FAIRLY FAST MOVING MORE LINEAR STRUCTURE HAS
EVOLVED ALONG THE SRN END OF STRONGER STORMS AND IS EJECTING NEWD AT
ROUGHLY 45KT ACROSS SWRN MN...NEARING THE ERN EDGE OF WW603.
CURRENT SPEED/MOVEMENT SUGGESTS SEVERE THREAT WILL SPREAD INTO CNTRL
MN ULTIMATELY NECESSITATING THE NEED TO EITHER EXPAND THE CURRENT
WW...OR ISSUE ANOTHER TORNADO WATCH SHORTLY.
..DARROW.. 08/12/2010
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...DLH...MPX...FGF...FSD...ABR...
LAT...LON 46249606 46049280 44869228 44139340 43799569 44849621
45589687 46249606
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