National Weather Service Detroit/Pontiac MI
3:43 AM Monday December 11.
occasional wave height is the average of the highest 1/10 of the wave spectrum. synopsis, high pressure averaging 30.10 inches will shift quickly east into quebec today as a clipper low pressure deepens to 29.60 inches as it drops from the upper midwest early this morning to the northern ohio valley by this evening. this low will deepen to 29.20 inches as it lifts through the eastern great lakes on tuesday. high pressure will then build into the region tuesday night and wednesday as the next clipper low bypasses the region to the south.