A cold front will work through the Region later today with gusty winds that shift to the northwest this evening. As a renewed batch of colder air funnels in over Lake Michigan, we’re expecting lake effect snow to develop late this evening and organize into a more concentrated band of heavier lake snow overnight into Friday morning.
Winds are expected to turn more northerly by morning targeting this band of snow towards Lake County and back into the southern suburbs of Chicago. During the day Friday, the band of snow will slowly progress east across Lake County into Porter County before fizzling in La Porte County later in the day as winds veer and conditions become less favorable for lake snow.
Overall this is a quick event, but we could see a very narrow band of localized heavier snow–especially in Lake County tonight into that morning commute.
There will be many of us that don’t see snow at all, but as you know, within that band of snow we could see localized heavy amounts up to half a foot possible. The highest probability would target northern Lake County, especially northwestern Lake County from Gary to Hammond to Whiting. Here’s an example of how this might play out in terms of accumulations: