Update 12:10AM CST…
A center of low pressure will track east across the Chicago area early this morning. Widely scattered light snow or flurries will occur ahead of the low – mainly north through counties adjacent to the Illinois-Wisconsin state line, where there might also be a bit of freezing drizzle.
Precipitation will end from the west just ahead of the low pressure center. However, at the same time clouds will lower somewhat with a chance of fog developing. By pre-dawn, the low pressure will be east of our area. Patchy fog and haze will slowly improve Sunday morning.
Update 10:35PM CST...
The primary band of snow had moved through Chicago and was over Lake Michigan into northwest Indiana at 10:30PM CST. Occasional light snow or flurries will continue with some light freezing drizzle possible in Lake county Illiniois before precipitation ends after midnight. Reports indicate for the most part snowfall this evening ranged between 1 and 2 inches.
Visibility observations at 10PM continue to show improvement back to the west with light snow over the immediate Chicago area..
It look like between 1 and 2 inches of snow associated with the stronger band of snow that was moving over Chicago and to the south (see current radar) at 9:15PM CST. The snow was still falling farther west, but very light (see improved visibility values west).
9PM CST area visibility values in miles…