In Grand Rapids, 20 of the first 27 days of January brought high temperatures at or below the freezing point. That has helped in developing ice. Ice coverage is near average for Lake Michigan, while the deficit is larger for Lake Superior, Ontario and Huron. Lake Erie has a substantial surplus.

MUSKEGON, MI— Lake Michigan was blasted with sub-zero Arctic air last week, causing the Lakeshore to rapidly transform into an icy wonderland. Ice cover expanded rapidly last week, reaching a short-term peak of 21 percent ice cover last Wednesday.