An arctic air mass will arrive late Sunday, bringing the coldest air of the season (so far) all the way to the coast with record challenging low temperatures Sunday night into Monday morning.
Gusty winds are expected Sunday and will continue into Sunday night as the coldest air arrives. This will lead to critical wind chill values of -10° F to -20° F east of the Cascades and Wind Chill Advisories will likely be needed for Sunday night into Monday morning.
Along the immediate coast, artic air will bring well below freezing temperatures Sunday through Tuesday mornings, but especially Monday morning.
Light snow is possible for West Side Valley floors late Saturday night into early Sunday morning. Little to no accumulation is expected.
Over the Marine Waters, north to northeast Gales are expected across the outer waters. Given the cold air and gusty northeast winds, freezing spray is possible over the waters near the immediate coastline.
Temperatures will remain cold into Tuesday morning, but trend warmer late Monday into mid-week.
Light snow amounts are possible over the weekend and could produce black ice or slick roads.
