A potent storm system will plow into the Northwest today, beginning a stretch of wintry weather.
Ample Pacific moisture associated with a strong disturbance will push onshore today along the Oregon and Washington coast, bringing drenching rain to the immediate coastal plain.
Strong winds will also buffet the coast with gusts in excess of 50-mph tonight into tomorrow.
Farther inland, the moisture will clash with cold air, producing snow in the mountains. Snow levels are expected to be quite low across the region. In Washington, residents of Seattle could see some snowflakes although accumulation is not expected.
According to Western Weather Expert Ken Clark, "Snow levels will dip to around 500 feet in Washington and northern Oregon."
Very heavy snow will spread over the mountains of northern California and southern Oregon beginning tonight.
Over a foot of snow could blanket the highest elevations of the Cascades and Sierra Nevada. Lesser amounts are expected in lower elevations.
Persistent westerly winds will continue to transport a steady stream of moisture into the region through Thursday with snow continuing in many places.
Travel through the passes of the Northwest is expected to become treacherous tonight and Wednesday when the bulk of the snow will fall. I-90 could be impacted, as well as I-5 in southern Oregon.
By Thursday evening, high pressure should begin to take hold of the region, putting an end to the wintry weather.
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.
After heat has dominated headlines this summer, cool air has finally taken control of the northern half of Europe with no signs of departing anytime soon.
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.
Steering winds could take Ignacio, as a remnant storm, into the southeastern arm of Alaska or British Columbia during the middle days of next week.
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.
Tampa, FL (1935)
The "Labor Day" hurricane hit Tampa, killing 400 people. Earlier, this intense storm had a center barometric pressure of 26.35 inches - the lowest recorded sea level pressure in the Western Hemisphere.
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.