[MCD] SWOMCD

Fri Aug 25 04:23:04 UTC 2006

ACUS11 KWNS 250425
SWOMCD
SPC MCD 250424 
WIZ000-ILZ000-IAZ000-MNZ000-250600-

MESOSCALE DISCUSSION 1878
NWS STORM PREDICTION CENTER NORMAN OK
1124 PM CDT THU AUG 24 2006

AREAS AFFECTED...SRN MN/NRN IA/SWRN WI/NWRN IL

CONCERNING...SEVERE THUNDERSTORM POTENTIAL...HEAVY RAINFALL 

VALID 250424Z - 250600Z

STRONG/LOCALLY-SEVERE STORMS CONTINUE ACROSS SRN MN AND ADJACENT
NERN IA/SWRN WI.  WITH THREAT EXPECTED TO PERSIST BEYOND 25/05Z WHEN
WW 743 AND 745 ARE SET TO EXPIRE...NEW WW WILL LIKELY BE NEEDED.

LATEST RADAR IMAGERY SHOWS STORM REDEVELOPMENT CONTINUING ACROSS
THIS REGION...WHILE ONGOING CLUSTER OF STORMS CONTINUES MOVING SEWD
ACROSS SERN MN/NERN IA/SWRN WI.  OBJECTIVE ANALYSES AND SURFACE DATA
REVEAL A VERY MOIST/UNSTABLE AIRMASS JUST S OF SURFACE
BOUNDARY...WITH SWLY LOW-LEVEL JET ADVECTING THIS AIRMASS
ISENTROPICALLY NEWD ATOP THE FRONTAL ZONE.  THIS SHOULD CONTINUE TO
SUPPORT STORM REDEVELOPMENT INVOF BOUNDARY FOR THE NEXT SEVERAL
HOURS. WIND FIELD REMAINS SUPPORTIVE OF SEVERE/SUPERCELL
STORMS...WITH HAIL AND LOCALLY-DAMAGING WINDS LIKELY TO BE THE MAIN
SEVERE THREATS.  ADDITIONALLY...WITH W-E MOVEMENT OF STORMS
INITIATING ALONG W-E BOUNDARY AND PERSISTENT FEED OF HIGH THETA-E
AIR FROM THE SW FUELING THE CONVECTIVE REDEVELOPMENT...THREAT FOR
LOCALLY HEAVY RAINFALL ALSO EXISTS.

..GOSS.. 08/25/2006

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

ATTN...WFO...LOT...MKX...DVN...ARX...MPX...DMX...FSD...

44029154 43918987 42618897 42038937 43009199 43269423
42929584 43219643 44249642 45079584 45059379 

WWWW