The National Weather Service says up to a half-foot of snow could fall on Kewaunee, Door and Manitowoc counties by late Wednesday afternoon, as a clipper-type low pressure system is expected to drop over the state late Tuesday night into Wednesday.

NWS forecasters issued a winter weather advisory for those three counties from 4 a.m. through 9 p.m. Wednesday.

“Plan on difficult travel conditions, including during the morning commute on Wednesday,” the advisory said. “Total snow accumulations of 4 to 6 inches are expected.”

Drivers should be prepared for reduced visibilities at times, the NWS said: “Roads will become snow-covered and hazardous.”

A winter weather advisory for snow means meteorologists believe periods of snow will cause primarily travel difficulties.

The highest amounts of snow are expected over the Fox Cities and along the Lake Michigan shoreline, but much of northern Wisconsin can expect snow Wednesday, the weather service said. Between 2 to 4 inches of snow is expected across northern Wisconsin, with lesser amounts in the far north.

Gusty northeast winds on the backside of the departing low pressure system may produce some patchy drifting snow in rural open areas late Wednesday.