[MCD] SWOMCD

[MCD at goshenarc.org]

ACUS11 KWNS 112003
SWOMCD
SPC MCD 112003 
IAZ000-MNZ000-112130-

MESOSCALE DISCUSSION 1191
NWS STORM PREDICTION CENTER NORMAN OK
0303 PM CDT FRI JUN 11 2004

AREAS AFFECTED...NRN IA AND SRN MN

CONCERNING...TORNADO WATCH 436...

VALID 112003Z - 112130Z

CONTINUE TORNADO WATCH 436 IN NRN IA/SRN MN.

AT 1940Z...CONVECTIVE COVERAGE AND INTENSITY CONTINUES TO INCREASE
ACROSS THE WRN PORTION OF THE WW 436 AREA...FROM 20 W RWF TO 25 SW
SPW. DEVELOPMENT IS GENERALLY NEAR THE SUB-SYNOPTIC LOW OVER NWRN
IA...AND N-S ORIENTED SURFACE TROUGH/OCCLUSION FRONT AND ASSOCIATED
CONVERGENCE ACROSS SWRN MN INTO WRN IA. MOST SIGNIFICANT STORM IS
THE SUPERCELL NEAR CLAY AND PALO ALTO COUNTY BORDER IN NWRN
IA...ANCHORED ALONG SURFACE WARM FRONT WHICH EXTENDS EWD ACROSS THE
NRN TIER OF IA. ADDITIONAL SUPERCELLS WERE DEVELOPING ALONG THE
FRONT JUST TO THE WEST OF THIS INITIAL STORM.
AIR MASS IS EXTREMELY UNSTABLE ALONG THE FRONT...WITH 100MB MLCAPE
AROUND 3000 J/KG. LOCALLY BACKED SURFACE WINDS ARE CONTRIBUTING TO
0-1KM SRH OF 100-150 M2/S2 ALONG THIS BOUNDARY. COMBINED WITH LOW
LCL HEIGHTS...A FOCUSED THREAT OF TORNADOES WILL CONTINUE ALONG THE
WARM FRONT IN NWRN/N-CENTRAL IA DURING AT LEAST THE NEXT 1-2
HOURS...WITH BOUNDARY GRADUALLY LIFTING TOWARD THE MN/IA BORDER. AS
FRONT LIFTS NWD AND CIN DIMINISHES IN SRN MN...TORNADO THREAT WILL
INCREASE ACROSS THE NRN PORTION OF THE WW AREA.

..BANACOS.. 06/11/2004

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

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

42289181 42279491 44539597 44509267 

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