MILWAUKEE-

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A winter storm is threatening to hit parts of Wisconsin starting early Thursday morning, with increasing snowfall expected through Friday.

This “Alberta Clipper” system moving south from Canada will not only affect Wisconsin, but will extend across multiple states, with winter weather advisories and warnings extending from Montana to our region.

The storm will bring varying amounts of snowfall depending on location. Areas near the state line can expect about 1 to 2 inches, while communities along the I-94 corridor are likely to see 2 to 4 inches. Further north, in Fond du Lac and Sheboygan counties, accumulations could reach levels between 4 and 6 inches.

Snow is expected to begin falling after 6 a.m. Thursday and continue throughout the day, likely making both morning and evening commutes more difficult.

There may be light snow at first, and some locations could see total snow at times as dry air mixes in in the morning and early afternoon. Snowfall will become heavier in the late afternoon and evening as the low pressure system passes through northern Illinois, resulting in the heaviest accumulations of the event.

Near Lake Michigan, slightly warmer lake temperatures could cause some lakeshore areas to remain near or just above freezing, resulting in heavier, wetter snow and potentially reducing overall accumulation in those locations.

Even after the main system passes, lake effect snow showers may continue into Thursday night and early Friday, providing an additional dusting of about an inch of snow, particularly in areas affected by localized snow bands off the lake.

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Snow showers should move in from southeast Wisconsin Friday morning, with skies gradually clearing by the afternoon.

Temperatures will be in the lower 30s on Friday, but there will be cooler, more seasonal air as the weekend begins. Highs will only reach the low to mid 20s on Saturday, setting the stage for the official start of the winter season.