[MCD] SWOMCD

[MCD at goshenarc.org]

ACUS11 KWNS 200941
SWOMCD
SPC MCD 200940 
NDZ000-SDZ000-MTZ000-201115-

MESOSCALE DISCUSSION 1397
NWS STORM PREDICTION CENTER NORMAN OK
0440 AM CDT MON JUN 20 2005

AREAS AFFECTED...ERN MT / SRN ND / NRN SD

CONCERNING...SEVERE THUNDERSTORM WATCH 502...

VALID 200940Z - 201115Z

SEVERE THREAT CONTINUES ACROSS MUCH OF WW...AND MAY SPREAD EWD OUT
OF WW INTO PORTIONS OF SERN ND / NERN SD.  ADDITIONAL WW MAY BE
REQUIRED TO COVER POSSIBLE EWD SPREAD OF SEVERE THREAT.

LATEST RADAR IMAGERY SHOWS STRONG / SEVERE STORMS PERSISTING ACROSS
MUCH OF WW...WHERE AIRMASS REMAINS MODERATELY UNSTABLE.  THOUGH
MAJORITY OF THREAT SHOULD REMAIN CONFINED TO THIS WW FOR THE NEXT
SEVERAL HOURS...STORMS ACROSS NWRN SD HAVE BECOME MORE ORGANIZED
OVER THE PAST 1 TO 2 HOURS.  THIS CONVECTION -- THOUGH OCCURRING
INVOF APPARENT WEAKNESS IN LOW-LEVEL FLOW FIELD -- SHOULD ENCOUNTER
INCREASINGLY-UNSTABLE AIRMASS AS IT MOVES EWD ALONG LEADING EDGE OF
COLD POOL.  WITH AN INCREASE IN DAMAGING WIND THREAT POSSIBLE AS
THESE STORMS MOVE INTO INCREASINGLY-MORE SURFACE-BASED INSTABILITY
INVOF SURFACE BOUNDARY...NEW WW MAY BE REQUIRED E OF WATCH 502.

..GOSS.. 06/20/2005

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

ATTN...WFO...FGF...ABR...BIS...UNR...BYZ...GGW...

47130684 47120339 46580002 46969765 46379687 45149860
44880189 45480503 46080687 

WWWW