By measuring the characteristics of the returning pulse we can map the speed and direction of the underlying (near surface) lake currents. What these two radars observe of the surface currents across ...

The Mackinac Bridge is closed due to falling ice, with more closures likely due to remaining ice on its structures.

STRAITS OF MACKINAC, Mich., (WPBN/WGTU) -- The Mackinac Bridge opened up to traffic around 8:30 a.m. Thursday morning. It's been closed for several periods throughout the week due to falling ice.

The Mackinac Bridge set a new record for being closed for 30 hours and two minutes, shattering the previous record of 20 ...