From nearly invisible black ice to freezing rain and sleet, here's how common winter weather hazards form, why they're so dangerous.

Learn how to tell the difference between freezing rain and sleet.

Meteorologist Ava Marie explains how sleet and freezing rain can form amid the coldest air up above, warm air beneath that, and cold air at the surface.

Even small differences, sometimes just a degree or two high in the atmosphere, can completely change what eventually reaches the surface.

The Friday morning commute could be an icy one, ABC7 Chicago meteorologists warn.

Meteorologist Ava Marie says the forecast is holding as we expect 6-10 inches of snow across much of Maryland and at least an inch of sleet on top of that.

Down to 28 tonight with a chance of freezing rain and sleet. Little to no ice accumulation expected. Mostly cloudy and breezy tomorrow with highs in the middle 30’s. Clear on Friday night as we drop down to 6 with a wind chill as cold as -3.