Much of the Chicago area remains fairly snowfall-free at 1PM, but that is expected to change rather rapidly by this evening across Lake and Cook counties.
High resolution, short range computer model guidance strongly suggests that lake effect snow bands start aiming for Chicago again between 2PM and 5PM, with the potential for heavy snow squalls between 4PM and Midnight. The majority of the heavier snowfall should be confined to those communities in Lake(IL) and Cook Counties, east of the Tri-State Tollway or I-294. Areas west of I-294 are still expected to see off and on snow showers, but the frequency and intensity of ths snow squalls will not be as high as those closer to the lakeshore.
With the heaviest snow over the next 12 hours expected to occur in northeast Illinois and far northwest Indiana, some of the warnings and advisories for Indiana and Michigan have changed. See Snow warnings canceled… for details
Here is a breakdown of how much snow you can anticipate, including the latest warnings and advisories.
Lake Effect Snow Advisory for Cook County and the City of Chicago. Communities east of the Tri-State Tollway (I-294), including the downtown Chicago, can expect 3″ to 5″ with isolated totals of up to 6″. West of I-294 (in Cook County), 1″ to 3″ of snow. The majority of the snow in northeast Illinois will occur between 4PM and 2AM.
Lake Effect Snow Warning for Lake(IN) and Porter(IN) Counties from Noon Today until Noon Thursday. Total accumulation of 4″ to 12″ by Noon Thursday. The warning for Berrian County was canceled at 11:30AM. The warning for La Porte county has been downgraded to an advisory at 11:30AM.
Lake Effect Snow Advisory for Jasper and La Porte Counties in Northern Indiana. Total accumulation of 3″ to 7″ by Noon Thursday. The advisory for Pulaski County was cancelled at 11:30AM
1″ to 3″ of Snow (but no advisory) for sections of Lake County and Will County in Ilinois. In Lake County, the heaviest accumulation will occur east of the Tri-State Tollway (I-294). In Will County, the heaviest accumulation is expected east of I-57, or over the eastern half of the County.
White: Winter Weather Advisory/Lake Effect Snow Advisory
Yellow: Winter Storm Watch
Red: Winter Storm Warning/Lake Effect Snow Warning