National Weather Service Chicago/Romeoville IL
2:48 PM Tuesday October 17.
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, expansive high pressure of 30.4 inches will settle over
the eastern ohio valley and mid atlantic coast through friday.
meanwhile, low pressure of 29.4 inches near james bay will move
to northern quebec tonight. a second and much stronger low
averaging 28.8 inches will take a similar track across northern
manitoba wednesday to hudson bay on thursday. the cold front
trailing from this low will move across the lake wednesday night
into thursday. another strong low pressure area will move across
the canadian prairies on friday and saturday.