[MCD] SWOMCD

[MCD at goshenarc.org]

ACUS11 KWNS 130452
SWOMCD
SPC MCD 130452 
MNZ000-IAZ000-NEZ000-SDZ000-130545-

MESOSCALE DISCUSSION 1639
NWS STORM PREDICTION CENTER NORMAN OK
1152 PM CDT MON JUL 12 2004

AREAS AFFECTED...SE SD...NW IA

CONCERNING...TORNADO WATCH 613...

VALID 130452Z - 130545Z

NEW SEVERE WW MAY BE NEEDED BY CURRENT 06Z EXPIRATION.

WEAK NEW SURFACE LOW HAS DEVELOPED IN SURFACE TROUGH TO THE WEST OF
SIOUX FALLS.  THIS IS IN ASSOCIATION WITH SHORT WAVE TROUGH DIGGING
FROM THE NORTH CENTRAL CANADIAN/U.S. BORDER AREA TOWARD THE UPPER
MISSISSIPPI VALLEY.  FAVORABLE LARGE-SCALE FORCING NEAR/EAST OF LOW
HAS BECOME FOCUS FOR INCREASING CONVECTIVE DEVELOPMENT PAST COUPLE
OF HOURS...AND SHOULD SLOWLY DEVELOP SOUTHEASTWARD WITH LOW
OVERNIGHT.  CONVECTION WILL BE SLOW TO PROGRESS OUT OF SOUTHEASTERN
SOUTH DAKOTA/NORTHWEST IOWA...IN ENVIRONMENT WITH LARGE CAPE FOR
PARCELS LIFTED ABOVE NEAR SURFACE INVERSION LAYER.

..KERR.. 07/13/2004

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

ATTN...WFO...FSD...OAX...

43799730 44049614 43809532 43549496 42679560 42519591
42419618 42529667 42759747 43359773 

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