Subj : MESO: Mesoscale Discussion 0338
To   : wx-storm@lists.illinois.edu
From : COD Weather Processor
Date : Sat Mar 25 2023 13:55:11

ACUS11 KWNS 251355
SWOMCD
SPC MCD 251354=20
MIZ000-WIZ000-251800-

Mesoscale Discussion 0338
NWS Storm Prediction Center Norman OK
0854 AM CDT Sat Mar 25 2023

Areas affected...Eastern Wisconsin and northern Michigan

Concerning...Heavy snow=20

Valid 251354Z - 251800Z

SUMMARY...Heavy snowfall rates on the order of one to two inches per
hour are expected to continue across eastern Wisconsin into northern
Michigan through the early afternoon hours.

DISCUSSION...Over the past 1-2 hours, multiple surface observations
from eastern WI and northern lower MI have reported falling snow
with visibilities at or below 1/4 mile. Given temperatures largely
in the low 30s and wind speeds between 10-15 knots, blowing snow
probabilities are sufficiently low to imply that the visibility
reductions are largely the result of heavy snowfall rates.
Furthermore, the lowest visibilities have been co-located with a
persistent organized snow band from eastern WI to the northern
portions of Lake Michigan, which further implies that heavy snowfall
is ongoing with rates as high as 1-2 inches per hour.=20

These observed trends are expected to persist at least through the
remainder of the morning. Dynamic lift associated with the left-exit
region of an upper jet, coupled with strong isentropic and
frontogenetical ascent in the 850-700 mb layer, will reside over the
region as a compact upper low, currently over north-central IL,
translates east into the lower Great Lakes region. Organized snow
bands will remain possible with snowfall rates as high as 2 in/hour
at times. Locations across northeast lower MI with temperatures
currently above freezing will likely see a transition from a mixed
precipitation type to mainly snow through the late morning as
low-level saturation/evaporative cooling allows for falling
temperatures closer to freezing.

...Moore.. 03/25/2023

....Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj=
g!95-DEgDooOoERF7rQD5qAwkc7VnK4Z3Z_RhS9yHn22sK9CMSMbkYwLKi6Psc7MQVqXfWvepqX=
qiqzYv5pP7rQr33uHM$  for graphic product...

ATTN...WFO...APX...GRR...MQT...GRB...MKX...

LAT...LON   43708665 43618682 43548719 43418742 43208771 43008801
            42938834 42918863 42948892 43058903 43258914 43638897
            44188870 45568773 46028721 46408663 46678584 46798514
            46698454 46508414 46238366 46018342 45768323 45088332
            44578424 44248493 44048548 43708665=20


=3D =3D =3D
To unsubscribe from WX-STORM and you already have a login, go to
https://lists.illinois.edu and use the "Unsubscribe" link.  Otherwise email
Chris Novy at cnovy@cox.net and ask to be removed from WX-STORM.

--- SBBSecho 3.14-Linux
 * Origin: capitolcityonline.net * Telnet/SSH:2022/HTTP (1:2320/105)

.