In other news, the rain/snow line has now moved north of Des Plaines. There's a thin coating of snow busily melting on top of wet pavement. The outside temperature is hovering just above freezing, but will likely drop during the night.
By morning, instead of having the sticky form of oobleck, we are going to have the really annoyingly slick version of oobleck on our driveway. I don't know if any of it will qualify as snow by then -- we'll see in the morning.