A mixture of rain and snow will be likely for most across northern
Illinois and southern Wisconsin Monday night, but a transition over to
all snow will be possible for some across the Midwest.
A cold front passing through the Stateline Sunday night will become the
driver for an area of low pressure to move along Monday evening and
Monday night. Light rain showers will fall Monday afternoon, becoming a
little more steady
during the evening. To the north and west, enough
cold air will move into the Midwest with a transition over to snow
taking place. That transition line could get into northwest Illinois,
stretching from a line from near Janesville, down to Freeport to
Savanna. Slushy accumulations are possible, but should remain mostly
confined to grassy surfaces where up to an inch could come down.
Moisture will be quick to move out early Tuesday, so most of the precipitation should be done by sunrise Tuesday.
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