National Weather Service Marquette MI
3:46 AM Saturday March 17.
occasional wave height is the average of the highest 1/10 of the wave spectrum. synopsis, a weakening high pressure ridge of 30.0 inches over the upper great lakes will give way to a low pressure trough of 29.9 inches which will pass over lake superior overnight saturdayn night. early next week, a 29.4 inch low will weaken as it moves through the southern ohio river valley, with a 30.4 inch high traversing through ontario. lake superior will be sandwiched between these two systems monday and tuesday, and the high will expand southward over our area on wednesday.