SWOMCD
SPC MCD 140352
MTZ000-140445-
MESOSCALE DISCUSSION 2013
NWS STORM PREDICTION CENTER NORMAN OK
1052 PM CDT SUN SEP 13 2009
AREAS AFFECTED...ERN MT
CONCERNING...SEVERE THUNDERSTORM WATCH 740...
VALID 140352Z - 140445Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 740
CONTINUES.
AN ISOLATED SEVERE THREAT MAY CONTINUE WITH THE CONVECTION ONGOING
IN FAR ERN MT. RUC ANALYSIS SUGGESTS VERTICAL SHEAR AND INSTABILITY
WILL CONTINUE TO SUPPORT ORGANIZED STORMS FOR ANOTHER 1-2 HOURS.
HOWEVER...THE THREATS SHOULD BECOME INCREASINGLY MARGINAL WITH TIME.
ANY SEVERE THREAT IS EXPECTED TO STAY WEST OF THE NORTH DAKOTA
STATE-LINE. A LOCAL WATCH EXTENSION MAY BE NECESSARY FOR THE ONGOING
SEVERE THREAT IN NE MT FOR PART OF THE OVERNIGHT PERIOD.
..BROYLES.. 09/14/2009
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...GGW...
LAT...LON 47380413 47080499 47090573 47220606 47730645 48230644
48740623 48960565 49050520 48970452 48650418 48450416
47380413
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