ZCZC SPCSWOMCD ALL
ACUS11 KWNS 022049 
SPC MCD 022049 
MIZ000-WIZ000-030145-

Mesoscale Discussion 0354
NWS Storm Prediction Center Norman OK
0349 PM CDT Tue Apr 02 2024

Areas affected...portions of eastern Wisconsin and the
western/central Upper Peninsula of Michigan

Concerning...Heavy snow 

Valid 022049Z - 030145Z

SUMMARY...Moderate to heavy snow will gradually expand in coverage
over parts of WI and MI this afternoon/evening. Rates of 1-1.5
in/hour are likely within the heaviest banding along the western
shores of Lake Michigan.

DISCUSSION...As of 2045 UTC, regional radar and surface analysis
showed a broad precipitation shield expanding north/northeastward
from a deepening surface cyclone centered over far northern IL.
Within this comma head structure, moderate to heavy rain has
gradually transitioned to snow. While temperatures have been only
marginally conducive for snow thus far, dynamic cooling and
low-level cold advection should allow for a full transition to snow
from west to east. Hi-res forecast guidance suggests the development
of one or more mesoscale bands is likely through this evening.
Likely driven by frictional convergence on the western lake shore
and slantwise convection, snow rates within some of these banded
structures may reach 1-1.5 in/hr.

Heavy snow will continue to expand east/northeastward across eastern
WI and the western UP through the afternoon and into the evening.
Confidence in the highest rates will remain along the western lake
shore where forcing for ascent and inland moisture advection are
expected to be the strongest. However, periodic heavy snowfall with
rates near 1 in/hr will remain possible across much of WI and the UP
through tonight.

..Lyons.. 04/02/2024

...Please see www.spc.noaa.gov for graphic product...

ATTN...WFO...APX...MQT...GRB...MKX...ARX...

LAT...LON   46738542 46368505 45948515 45238635 44728699 44108741
            43688788 43628803 43398842 43288870 43218897 43238926
            43718968 44298987 44948978 45448958 45848928 46088894
            46298818 46628682 46708622 46738542 

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