SWOMCD
SPC MCD 282319
SDZ000-WYZ000-290045-
MESOSCALE DISCUSSION 1777
NWS STORM PREDICTION CENTER NORMAN OK
0619 PM CDT THU JUL 28 2011
AREAS AFFECTED...WESTERN/CENTRAL SD AND FAR NORTHEAST WY
CONCERNING...SEVERE THUNDERSTORM WATCH 696...
VALID 282319Z - 290045Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 696
CONTINUES.
SEVERE TSTM WATCH 696 CONTINUES UNTIL 04Z...WITH POTENTIAL FOR
SEVERE HAIL/DAMAGING WINDS MAINLY ACROSS CENTRAL/WESTERN SD.
EARLIER/INITIAL SEMI-DISCRETE STORMS HAVE CONGEALED/EVOLVED INTO A
QUASI-LINEAR CONVECTIVE SYSTEM ACROSS NORTHWEST SD LATE THIS
AFTERNOON/EARLY EVENING. WITH OBSERVATIONAL INDICATIONS OF AN
EXPANDING SURFACE COLD COOL...THESE STORMS ARE LIKELY TO CONTINUE TO
CONGEAL/SPREAD SOUTHEASTWARD WITH SOME POTENTIAL FOR AN INCREASING
DAMAGING WIND THREAT IN ADDITION TO SEVERE HAIL. WITHIN A MODERATELY
UNSTABLE/SHEARED ENVIRONMENT...CURRENT THINKING IS THAT THE
STRONGEST DEVELOPMENT WILL PREFERENTIALLY FAVOR WEST-CENTRAL/CENTRAL
SD IN VICINITY OF A NORTHWEST-SOUTHEAST ORIENTED BOUNDARY THAT
EXTENDS ROUGHLY FROM THE FAITH/CHEYENNE INDIAN RESERVATION
VICINITIES SOUTHEASTWARD TO PIERRE/MITCHELL.
..GUYER.. 07/28/2011
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...ABR...UNR...
LAT...LON 44430415 45180366 45520115 45139954 44099899 43729998
44000218 43670337 44430415
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