Dry air initially a couple thousand feet above the surface Thursday evening prevented much of what was showing up on radar from reaching the surface. But now that the atmosphere is a little more saturated, reports of sleet and freezing rain have been coming in across northern Illinois. The reports are spotty, and not widespread, but even with light precipitation - especially freezing precipitation - it can have a big impact on travel.
Main road temperatures (more of the traveled roads) are near or slightly above freezing, but lesser traveled and secondary roads may have a thin glaze of ice on them by early Friday morning. The same will occur for elevated surfaces, parking lots, sidewalks, etc. You can't see black ice so make sure you're a little extra cautious during the commute Friday. Most of the precipitation will be wrapping up around 2am/3am Friday morning.
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