Subj : MESO: Mesoscale Discussion 2203
To   : wx-storm@lists.illinois.edu
From : COD Weather Processor
Date : Mon Nov 10 2025 09:52:35

ACUS11 KWNS 100952
SWOMCD
SPC MCD 100952=20
INZ000-ILZ000-WIZ000-101245-

Mesoscale Discussion 2203
NWS Storm Prediction Center Norman OK
0352 AM CST Mon Nov 10 2025

Areas affected...portions of extreme southeast Wisconsin into far
northeastern Illinois and extreme northwestern Indiana

Concerning...Heavy snow=20

Valid 100952Z - 101245Z

SUMMARY...Heavy snow will continue with ongoing lake-effect snow
bands for at least a few more hours, with 1-2 inch/hour snowfall
rates expected.

DISCUSSION...Heavy snow continues to be reported with a primary snow
band along the Lake Michigan/WI/IL shoreline. This snow band is
oriented roughly parallel to the 925-700 mb mean wind, which
features a broad, deep fetch of moisture off of Lake Michigan. This
scenario is optimal for the snow band to remain roughly stationary,
with continued heavy snow occurring with likely low-topped
convection (given 250 J/kg MUCAPE just offshore per 09Z
mesoanalysis). Given saturation within the dendritic growth zone,
along with the likely convective nature of the snowband, 1-2
inch/hour snowfall rates are likely through at least 12Z. Similar
snowfall rates should also continue south of the Chicago
metropolitan area, where low-level frontogenesis is maximized.

...Squitieri.. 11/10/2025

....Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj=
g!5_2OeK7oa9KNBPXkUmA7r-xWtvU-mqEU7DWQ65wIKgT-x-qzMBbeTfYR0EsVUDKCu8u5dNEvE=
G1_L3Xuf9Jq-orFSpc$  for graphic product...

ATTN...WFO...LOT...MKX...

LAT...LON   41828755 41718741 41628721 41508698 41408695 41298708
            41188735 41008767 40938793 41018817 41378830 42148822
            42638819 43008809 43218799 43038774 42838767 42668774
            42238773 41968761 41828755=20


=3D =3D =3D
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