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Good Monday morning! Current radar at 6am ET shows the rain showers over western Illinois, mixing with snow northwest of Peoria:
Rain showers will stay focused across Illinois much of the day, as dry air will hold tough across Indiana and especially Ohio. The rain will weaken as it moves east, with light showers expected to push across Indiana and eventually Ohio overnight. It will be cold enough for this to fall as wet snow in far northern Illinois, as well as northeast Indiana. This activity should clear out of Indiana by daybreak Tuesday.
Light snow accumulations of generally 1″ to 2″ in far northern Illinois (highest amounts along Wisconsin border), with a dusting to locally 1″ of slushy snow in northern Indiana through early Tuesday:
Areas such as Chicago, Aurora, Rockford, and Waukegan Illinois are under a winter weather advisory where the snow will fall at a good clip for a few hours, mainly in the 7pm to midnight CT time-frame.
Temperatures in many areas reach the 40s today, then fall into the 30s for most overnight, with areas up north seeing temps at or above freezing while the snow falls, then falling below freezing there by tomorrow morning, which could mean a couple slick spots. Temperatures rebound Tuesday, before falling once again later in the day north to south.
After some sunshine Tuesday morning, an upper-level low will move over the region Tuesday evening into Wednesday, and will bring scattered rain and snow showers. Some of these snow bursts especially north will be intense, and will whiten the ground for some. This could create a few slick spots for the Wednesday morning commute.
Hi-res data picking up on the scattered coatings of snow Tuesday night into Wednesday, may be local areas that get overachieving bursts north:
WIND will be a big headline as well this week, particularly Tuesday and Wednesday. West/southwest winds could gust to 40 mph Tuesday, then gusts over 30 mph possible Wednesday out of the northwest.
The forecast should trend mainly dry from late Wednesday through most of Friday, outside of a few additional flurries north and east. The next disturbance will move through Friday evening into Saturday morning, bringing a burst of rain and snow across the area:
Lower confidence on a possible secondary system showing up for Sunday, especially in southern portions of the region. Models try to wrap in enough cold air for a snow threat for southeast areas….just know confidence is low regarding this system (track/precip. type/marginal air temps). We will monitor it over the coming days.
Temperatures will be coldest on Wednesday and Thursday with a true winter feel, then a rebound Friday into the first part of the weekend, before colder air returns Sunday.
