[MCD] SWOMCD

Sat May 27 19:14:23 UTC 2006

ACUS11 KWNS 271912
SWOMCD
SPC MCD 271912 
WIZ000-ILZ000-IAZ000-MNZ000-272045-

MESOSCALE DISCUSSION 1001
NWS STORM PREDICTION CENTER NORMAN OK
0212 PM CDT SAT MAY 27 2006

AREAS AFFECTED...SERN MN...WI...NRN IL

CONCERNING...SEVERE THUNDERSTORM POTENTIAL 

VALID 271912Z - 272045Z

...ISOLATED SEVERE THUNDERSTORMS WILL DEVELOP AHEAD OF UPPER
SHORTWAVE TROUGH...

CENTER OF WEAK UPPER VORT APPEARS TO BE LOCATED OVER NERN
IA...LIFTING NEWD WITHIN THINNING MID-HIGH LEVEL CONVECTIVE DEBRIS
FROM EARLY MORNING MCS.  ALONG THE LEADING EDGE OF THIS CLOUD
CANOPY...CONVECTION HAS RECENTLY DEVELOPED WHERE BOUNDARY LAYER
WARMING IS MAXIMIZED...AND WARM ADVECTION APPEARS TO BE FOCUSED. 
TWO AREAS ARE OF CONCERN FOR ISOLATED SEVERE THUNDERSTORMS:  1)
ARCED SHAPED LINE OF DEVELOPMENT FROM DAKOTA COUNTY MN...TO PORTAGE
COUNTY WI.  THIS ACTIVITY SHOULD CONTINUE TO INCREASE AS IT LIFTS
NWD THIS AFTERNOON.  2) ANOTHER CONCENTRATED ZONE OF DEEP CONVECTION
SHOULD DEVELOP SHORTLY FROM NCNTRL IL...SWWD TO NEAR THE IA/IL/MO
BORDER.  HIGH INSTABILITY IS SPREADING/DEVELOPING NEWD AS EVIDENT BY
EXPANDING CU FIELD.  BOTH OF THESE AREAS WILL BE INFLUENCED GREATLY
BY LARGE SCALE ASCENT ASSOCIATED WITH EJECTING SHORTWAVE TROUGH. 
LARGE HAIL AND DAMAGING WINDS ARE THE PRIMARY SEVERE THREATS.

..DARROW.. 05/27/2006

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

ATTN...WFO...GRB...LOT...ILX...MKX...DVN...DLH...ARX...MPX...

40859210 42889105 43949325 45189368 46399105 44528788
41598795 40409132 