ST. PAUL, Minn. – The Army Corps of Engineers. which administers many waterways in Minnesota and Wisconsin, issued its annual warning about recreation out on ice. “Current conditions are poor at best with minimal ice on most lakes and rivers,” the Corps said. When will ice-fishing and other winter activities be safe? The usual guidance:
> 4 inches for a person.
> 5 inches for a snowmobile.
> 10 to 12 inches for a small car.
> 12 to 18 inches for a light truck.