Both directions of the Mackinac Bridge are closed at this hour (1pm Friday) due to a crash and weather/low visibility.
This picture was taken from the Bridge Cam at 1pm Friday, where you can't see a thing because of the blowing snow and low visibility.
Drivers are instructed to reduce their speed to 20 miles per hour as they approach the bridge and be prepared to stop. Bridge personnel are stationed at both ends of the structure to provide instructions.
The Mackinac Bridge Authority is monitoring conditions at various points along the structure. When conditions improve, the bridge will be reopened to traffic. If you are planning to travel to the Straits area, please tune to AM radio 530 or 1610 for updates.
You can also get updates on the Mackinac Bridge's website at http://www.mackinacbridge.org/conditions-25/