National Weather Service United States Department of Commerce

Tracking a Couple of Storm Systems Across the Country

Showers, along with a few strong to severe thunderstorms, are expected from the Great Lakes, New England and southward into the Ohio and Tennessee Valleys. In the wake of this system, a stronger storm is expected to track from the Pacific Northwest, Plains and through the Eastern U.S. this weekend. Strong winds, showers and a larger drop in temperatures are expected this weekend into Monday. Read More >

Bands of lake effect snow are expected to develop Sunday through Monday in the vicinity of southern Lake Michigan. The main timeframe of concern for accumulating snow and winter driving conditions is Sunday night into Monday, but confidence in exactly where remains low. The mild waters of Lake Michigan may also reduce snow amounts and roadway impacts along and near the lakeshore, wherever the snow bands focus.
As of Friday afternoon, there are three general forecast scenarios for lake effect snow late Sunday evening through midday Monday. Note that scenarios #1 and #2 (mainly northwest Indiana) would be more typical for this time of year and overall more likely than scenario #3 (which includes parts of Illinois). It remains too early to rule out any particular outcome, however. Stay tuned!
An early taste of winter arrives this weekend with rain Saturday then mixing with snow by early Sunday. Bands of lake effect snow late Sunday evening into Monday may lead to localized snow accumulations and winter travel conditions. Temperatures then warm back into the 50s toward the middle of next week.