Before we get to the rain, we may have to deal with a mix of snow, sleet and freezing rain as early as Wednesday night. It won't be much, but could be just enough to cause some problems for the commute Thursday morning. This is when temperatures will be slightly below freezing (32 degrees).
As warmer air and a little more moisture are pulled north ahead of the low, surface temperatures should rise above freezing switching any wintry precipitation over to rain. Light rain showers will likely persist into Thursday night with a little more steady rain falling for Friday. Temperatures Friday will warm into the upper 30's in northern Illinois, middle to upper 30's in southern Wisconsin.
The center of the low will pass overhead Friday night with colder air wrapping back in for Saturday. This means our low Friday night and our high Saturday morning will be nearly the same, with temperatures dropping by Saturday evening. If the low tracks a little further to our south Friday evening/night, we could see a transition back over to a mix before the lighter snow Saturday. Something to keep in mind as we get closer to the end of the week. A much colder air mass moves in late in the weekend and into next week. You can read more about that in Meteorologist Tyler Sebree's blog post below.
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