An early season winter storm will impacts parts of the northern Plains
and Upper Midwest later this week, bringing several inches of snow
across the northern tier of the country. Winter Storm Watches, Winter
Storm Warnings and Winter Weather Advisories have already been issued
for the northern Rockies, likely expanding further east within the next
day or two.
Strong low pressure will develop late Tuesday
into Wednesday afternoon,
quickly lifting northeast into the Upper Midwest by Thursday and then
Upper Great Lakes Friday and Saturday. As the low pressure system
deepens, it will pull down an unseasonably cold air mass. On the warmer
side of the low rain and storms can be expected (including for us in
northern Illinois and southern Wisconsin Thursday and Friday). Behind
the low, however, heavy snow will fall causing significant impacts to
travel, as well as to agriculture. Isolated locations could receive
over a foot of snow by the end of the week. Combine that with a strong
wind and some places may even experience near blizzard-like conditions.
By the time the cold front arrives into northern Illinois Friday
evening most of the moisture will be gone, but the cold will stick
around. Temperatures will tumble quite a bit from the mid and upper 60s
early in the day Friday, down into the mid 30s Friday night and
Saturday. No snow is expected for us, but a few wind-driven showers are
possible during the afternoon Saturday.
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