The National Weather Service (NWS) issues winter storm warnings and watches. Here’s what they mean and what you should do.

Winter Weather Advisory

There is a high confidence that a hazardous winter event will occur over a 12 hour period (e.g., 3 to 5 inches of snow) but should not become life threatening if caution is used.

Winter Storm Watch

Winter storm conditions including freezing rain, sleet, and heavy snow are possible within the next 36-48 hours. Continue monitoring the weather forecast.

Winter Storm or Ice Storm Warning

A significant winter storm is occurring or will begin in the next 24-36 hours. Heavy snow (e.g., 6 inches in 12 hours) or the combination of snow, sleet, freezing rain, and moderate winds will impact travel and outdoor activities and could become dangerous or deadly. An Ice Storm Warning is issued when mostly freezing rain is expected with ice accumulations of at least ¼ inch within a 12-hour period. When a Warning is issued, take necessary precautions – consider canceling travel plans.

Blizzard Warning

A dangerous storm with winds that are 35 mph or greater in combination with falling and/or blowing snow that reduces visibility to 1/4 mile or less for a duration of at least 3 hours. Canceling travel plans is advised.

Wind Chill Advisory

Issued for bitter cold wind chills of 20 to 34 below zero (25 to 34 below zero in the northwest portion of the state)

Wind Chill Warning

Issued with wind chills of 35F below zero (40F below zero for far NW portion of Wisconsin). Frostbite is possible when outside for 10 minutes or less.