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.
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.