Wind chills are expected as low as minus 30 because temperatures will be 5 to 10 degrees below zero and northwest winds will be blowing between 10 and 20 mph with gusts as high as 35 mph. The National Weather Service says the combination of gale-force winds (with gusts up to 40 knots), waves between 3 to 5 feet and bitterly cold temperatures could lead to “light to moderate accumulation of ice on vessels.” The U.S.