National Weather Service Chicago/Romeoville IL
2:33 AM Friday November 24.
waves are provided as a range of significant wave heights, which
is the average of the highest 1/3 of the wave, along with the
average height of the highest 10% of the waves which will
occasionally be encountered.
synopsis, low pressure of 29.2 inches over western ontario will
deepen to 29.1 inches as it passes north of the lakes today. a
cold front trailing the low will move across lake michigan
tonight, as high pressure of 30.1 inches builds across the plains.
this high will move across the western great lakes over the
weekend, before a 29.8 inch low passes over, or very close to the
northern great lakes sunday. high pressure of 30.2 inches will
then build across the great lakes through early next week.