CHICAGO — The first round of the winter one-two punch has hit Chicagoland.
Accumulating snow began to fall across the Chicago area Wednesday afternoon.
A Winter Weather Advisory is in effect for most of the Chicago area until noon Thursday.
Snow accumulations of 2 to 6 inches are possible.
Localized greater snowfall totals will be possible Thursday/Thursday night in Cook County around the south end of Lake Michigan into Lake and Porter Counties in NW Indiana due to strong north winds gusting over 35 mph that will cause enhanced lake-effect snow. A Lakeshore Flood Advisory (Cook County) and Lakeshore Flood Warnings (Lake and Porter counties in Indiana) are also in effect until Thursday night with the strong winds building 10 to 15-foot waves on top of the record-high lake levels.
Slightly lower snowfall totals are expected farther north and west in Illinois with only an inch or two possible along the Illinois/Wisconsin border. Dangerous travel/outdoor conditions will also likely exist for the Thursday morning commute. with snow/blowing snow.
During the next 24 hours, a center of low pressure will move out of eastern Texas northeast through Tennessee and Kentucky up the Ohio River Valley,
After the snow comes the bitterly cold. Friday morning is expected to be the coldest and feel the coldest. Wind chills Friday morning are expected to be -5 to -20 degrees & here are a couple forecast models that back up our thinking. #Chicago #ilwx #inwx pic.twitter.com/JZRMqIz1de— Mike Janssen (@MikeJanssenWX) February 12, 2020
Bitter Arctic-source high pressure will spread over our area from the northwest with temperatures falling rapidly into the teens Thursday, single-digits Thursday evening eventually dropping below zero with frigid 10 to 20-below wind chills Friday morning. Highs on Friday look to be in the teens.