SWOMCD
SPC MCD 240921
MNZ000-SDZ000-NDZ000-241015-
MESOSCALE DISCUSSION 0684
NWS STORM PREDICTION CENTER NORMAN OK
0421 AM CDT MON MAY 24 2010
AREAS AFFECTED...NORTHERN/EASTERN SD AND SOUTHERN/EASTERN ND TO
NORTHERN MN
CONCERNING...SEVERE THUNDERSTORM WATCH 209...211...
VALID 240921Z - 241015Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH
209...211...CONTINUES.
SEVERE TSTM WATCHES 209/211 CONTINUE UNTIL 11Z/14Z RESPECTIVELY.
OVERALL SEVERE HAIL POTENTIAL SHOULD CONTINUE TO BECOME MORE
MARGINAL/ISOLATED THROUGH THE EARLY MORNING HOURS...WITH THE PRIMARY
SEVERE THREAT REMAINING ACROSS FAR EASTERN ND AND NORTHERN MN.
WITHIN A STRONG ELEVATED MOISTURE TRANSPORT REGIME...BANDS OF
ELEVATED TSTMS WILL CONTINUE TO GRADUALLY EXPAND NORTHWARD ACROSS
SOUTHERN ND/NORTHERN MN OVER THE NEXT FEW HOURS. WHILE BOUTS OF
MARGINALLY SEVERE HAIL WILL REMAIN POSSIBLE THROUGH THE PREDAWN
HOURS...STORM-SCALE UPDRAFT INTERFERENCE AND THE INFLUENCE OF
SHORTWAVE RIDGING ALOFT SHOULD LEAD TO A DIMINISHING RISK OVERALL
THROUGH THE EARLY MORNING HOURS. AS SUCH...EXISTING WATCHES 209/211
MAY ULTIMATELY BE CANCELLED EARLY IF DOWNWARD CONVECTIVE TRENDS
CONTINUE OVER THE NEXT FEW HOURS.
..GUYER.. 05/24/2010
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...DLH...MPX...FGF...FSD...ABR...BIS...
LAT...LON 46460117 47419849 48029504 48129229 47049290 45689568
43259842 45389946 46460117
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