Lows this Wednesday morning (at 18-25) were the coldest since December 20. With 26-33, Wednesday saw the coldest afternoon highs since December 18.
Temperatures rise tonight from 21-26 to 28-34 as southeast wind increases to 15-25 mph, knocking wind chills down to 10-20.
Gusts 40-50 mph from the south-southwest are likely Thursday. A couple isolated +50 mph gusts are possible.
Winds decrease to 30-45 mph gusts Thursday night.
It clouds up & some showers develop late Thursday.
Showers & even a few isolated embedded t'storms are likely Thursday night-Friday morning.
After highs 47-51, temperatures should rise to 50-55 by early Friday morning.
Showers & isolated thunder are likely Friday with gusty winds 35-45 mph at times from the south to south-southeast with highs in the 50s
Just north of the front, icing will get going over Illinois.
Heaviest rainfall is likely to pass Friday night-early Saturday in the 12 a.m. to 7 a.m. time frame. Embedded t'storms are possible & an isolated severe t'storm is possible south of I-74.
Flash flooding is likely.
Band of heavier rainfall looks to focus along that front that begins to sink southward in the area. Temperatures Friday night will vary from 38 far northwest to 61 in the far south with 58 falling to 42 around Greater Lafayette.
There is a question as to where the heaviest band of rainfall will set up. 2-4" is likely area-wide Thursday-Saturday (again, heaviest of that most likely Friday night-early Saturday).
A band of +4" will occur, but there is considerable uncertainty on the exact position of that band.
Widespread Moderate river flooding is likely on the Tippecanoe, Eel, Wabash Rivers, Iroqouis & Kankakee Rivers.
There is the risk of some Major flooding on rivers if the heaviest band can establish right over river basins.
River flooding will occur Sunday-Friday of next week with crests Monday-Thursday, most likely.
Creeks & streams may flood & crest Saturday-Saturday night.
There is also considerable uncertainty on just how much ice & snow will occur & just exactly when the transition will occur.
If it takes longer to transition, then there will be much less. An earlier transition means more.
Winds will decrease along the front, then pick up again behind it with some 40-50 mph gusts possible Saturday evening-night as temperatures drop to the 20s.
A transition from rain to icy mix to snow should occur northwest to southeast Saturday, then exit by Saturday evening-night.
Some minor ice/snow accumulation cannot be ruled out, especially in our northwestern areas.
The heaviest ice & snow accumulations look to be over northern & north-central Illinois. Icing with the high winds there may cause some power outages.
Sunday calms down, but howling winds & a couple of Clipper cold fronts will pass early to mid next week followed by bitterly cold air.
Next weekend, some ice & snow are possible next Saturday.