NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
2:51 AM Sunday MAY 28.
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 29.7 inches over central illinois this
morning will pass near the south end of lake michigan today as it
lifts northeast into lower michigan by this evening. another low
of 29.6 inches over northwest ontario will deepen to 29.4 inches
north of the lakes by early monday. this low will only slowly
drift east to near james bay through tuesday night, eventually
filling to 29.6 inches across northwest quebec by late wednesday.
meanwhile, high pressure of 30.2 inches will build across the
northern plains tuesday and shift to the ohio valley thursday.