It looks like we'll book-end our Thanksgiving holiday with two storm
systems that will have a big impact on the Midwest and Great Lakes. The
first arrives Tuesday afternoon and evening, producing mostly rain and
wind locally. Skies will remain partly to mostly cloudy during the
afternoon Monday with high temperatures rising into the upper 40s, to
near 50 degrees. A weak ridge of high pressure will briefly move in
Tuesday morning ahead of a strong low pressure system that is forecast
to lift northeast from the Central Plains Tuesday, into Iowa and
Wisconsin by Wednesday. A warm, moist air mass will lift north ahead of
the approaching low bringing a chance for rain by late morning Tuesday.
Rain showers look to become more widespread by the afternoon and
evening, with even a rumble of thunder or two possible Tuesday night.
As the low moves from Iowa into Wisconsin Wednesday, the wind field
around the deepening low will strengthen. This will cause winds to
increase significantly across northern Illinois and southern Wisconsin
during the day Wednesday. Peak wind gusts could top 40-45 mph, with a
few places even approaching 50 mph! Temperatures will fall throughout
the day Wednesday making for a very blustery travel day. It'll be
mostly rain that falls across the immediate Stateline, but if your
travel takes you north or west you'll likely encounter accumulating
snow. As for rainfall totals Tuesday, another half an inch to an inch
of rain could come down. Most of the precipitation will be done by
Wednesday but light snow showers, mixed with rain at times, will be
possible through the afternoon.
This first storm will quickly move east for Thanksgiving, but another
one looks to develop out west Thursday night and Friday. This, too,
looks to take a path to our west Friday and Saturday giving us another
chance for rain heading into the weekend. Wind will also be an issue
with this second storm, as well as the chance for snow by the end of the
upcoming weekend.
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