National Weather Service Marquette MI
9:42 PM Wednesday March 21.
waves are the significant wave height - the average of the highest 1/3 of the wave spectrum. occasional wave height is the average of the highest 1/10 of the wave spectrum. synopsis, a 30.4 inch high centered near james bay and associated ridge over the great lakes will ever so slowly shift east into quebec by sunday. monday and into tuesday, a low pressure system of 30.1 inches will approach from the southwest and pass over lower michigan on wednesday.