National Weather Service Marquette MI
4:46 PM Sunday February 18.
.CORRECTED NATIONAL WEATHER SERVICE MARQUETTE MI 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 trough of 29.7 inches will move into the upper great lakes this evening and weaken to 29.9 inches late tonight, and a 30.5 inch high pressure will then move across northern ontario monday. secondary troughing of 29.8 inches will push northeastward into the western great lakes into tuesday morning and remain in the area through wednesday morning. a high pressure system of 30.6 inches will reach the great lakes wednesday afternoon and slowly shift into southern quebec through the day thursday.