The storm system that has been bringing rain to the Portland, Ore., area is weakening, but will bring more rain, some snow and colder air into Thursday.
"Overnight Wednesday, the low temperature will be in the mid- to upper 30s," said AccuWeather Meteorologist Andy Mussoline.
The overnight low on Tuesday was about 15 degrees warmer, at 45 degrees F.
Daytime temperatures on Thursday will struggle to reach the low 50s. Some lingering showers are also possible.
"A few inches of snow could accumulate in the Cascades at altitudes above 2,500 feet," Mussoline said. "Travel over the passes could be slippery early Thursday morning."
An unusually strong push of cool air for early September will move southward along the Atlantic Seaboard into the Labor Day weekend, before July-like heat returns by next week.
While lulls in tropical activity in the Atlantic will continue, a rapid end to the hurricane season in September does not always occur during an El Nino.
Heat will be erased by an autumnlike air mass across parts of northern Europe.
While Tropical Storm Kevin will stay well away from Mexico, its moisture will still lead to an increase in showers and thunderstorms from Baja California to the Four Corners region of the United States.
A stormy weather pattern will prevail through September across much of southern South America.
Typhoons and building drought will impact more than one billion people in southeastern Asia this fall.
Denver, CO (1961)
Earliest snow on record; a total of 4.2 inches. A great storm raged at high elevations with 2-3 feet of snow closing roads on Labor Day weekend.
Coffeyville, KS (1970)
Hailstone 17.5/44 cm in circumference 1.671 lb/757 gm.
Long Island NY (1821)
Long Island hurricane of 1821 struck western Long Island. The storm affected a densely populated area where weather observers were common.