Yes, that was snow falling from the sky in Northwest, Fox Valley and McHenry County suburbs Friday morning.
Amy Seeley, meteorologist from the National Weather Service, said a snow/rain mix fell in the Northwest suburbs, causing some slick roads and icy conditions.
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The snow melted quickly in the morning.
"But, it's actual snow," she said.
Snow has been reported as late as June 2 in Illinois, authorities said, so an occasional snow in May is not unheard of.
On Saturday morning, however, only patchy frost is expected -- not even enough for the National Weather Service to issue a frost advisory, it said Friday evening.
Temperatures might hit 60 in the outlying areas, maybe remain in the 50s in nearer suburbs, the weather service says. But Saturday will begin a longer-term warm-up.