[MCD] SWOMCD

[MCD at goshenarc.org]

ACUS11 KWNS 210758
SWOMCD
SPC MCD 210758 
NDZ000-MTZ000-210930-

MESOSCALE DISCUSSION 1411
NWS STORM PREDICTION CENTER NORMAN OK
0258 AM CDT TUE JUN 21 2005

AREAS AFFECTED...NERN MT / NWRN ND

CONCERNING...SEVERE THUNDERSTORM WATCH 508...

VALID 210758Z - 210930Z

CLUSTER OF STRONG / SEVERE STORMS CONTINUES MOVING EWD ACROSS NERN
PORTIONS OF MT TOWARD NWRN ND ATTM.

COMBINATION OF MODERATELY-UNSTABLE AIRMASS AND SELY LOW-LEVEL JET
CONTINUES TO FUEL PERSISTENT CONVECTIVE CLUSTER APPROACHING THE NERN
MT / NWRN ND BORDER ATTM.  WITH SELY LOW-LEVEL FLOW BENEATH 40 TO 50
KT WLY WINDS AT MID LEVELS AND FAVORABLE SELY INFLOW...STORMS WILL
LIKELY REMAIN ORGANIZED / PERSIST FOR SEVERAL HOURS.  

INSTABILITY AXIS REMAINS ORIENTED NW-SE FROM ERN MT INTO WRN SD. 
WITH INCREASINGLY-LESS UNSTABLE AIR WITH EWD EXTENT ACROSS NWRN
ND...WOULD EXPECT NERN-MOST STORMS TO WEAKEN WITH TIME...THUS
POSSIBLY PROMOTING AN EFFECTIVE TURN OF THE STRONGER CONVECTION
TOWARD THE SE WITH TIME.

..GOSS.. 06/21/2005

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

ATTN...WFO...BIS...GGW...

48110538 48540323 48360223 47840200 47060220 46560262
46510326 47230479 47640536 

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