The nastiest travel weather in the nation into much of the week of Thanksgiving is taking aim at the Northwest.
A combination of a parade of moisture from the Pacific Ocean and the southward push of Arctic air will lead to some cold storms in the Northwest now through the first part of next week.
When the pattern finally settles, temperatures could dip well below zero in eastern Washington to Montana and the Dakotas, and snow could fall on Seattle.
The coldest air of the season so far may visit the Northwest and could produce some snow around Seattle in the days ahead.
Whether or not there are merely a few snowflakes or a bit more falling around Seattle remains to be seen this weekend. As does the possibility of temperatures staying below zero during the day over Montana early next week.
However, the worst travel conditions due to the weather will stretch from the coastal areas of Washington and Oregon through the northern Rockies and northern High Plains through at least Tuesday of next week.
Snow could clog the passes, while rain, fog and even wind-whipped snow could cause flight delays at some airports in the region.
Areas north of I-80 can be adversely affected by the expanding cold and storms. The I-90 corridor appears to heading into the thick of the nastiest conditions.
So while the snow would be great for skiing interests, people trying to get to some of the resorts may run into weather-related delays.
As conditions may improve in the Northwest on the heaviest of travel days, next Wednesday, unsettled weather and travel problems spawned by advancing cold air may shift into the South, Midwest and East.
Keep checking in at AccuWeather.com for updates on "Snovember" in the Northwest and the autumn bliss as it comes to an end in the East.
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A spike in severe thunderstorms, capable of producing tornadoes, will follow a slow start to severe weather season in 2014.
Another storm in a seemingly endless parade threatens to bring severe weather, snow and flooding from Texas to Maine.
Knowing when precipitation will stop and start allows for effective, last-minute decision making when weather impedes daily life schedules.
Central/Eastern U.S. (1993)
In the wake of the "Storm of the Century," record low temperatures were established from Texas to Illinois and Florida to New York state.
New England (1984)
Major snowstorm. A total of 37" near Rutland, VT; almost 2 feet at Portland, ME. 7" of sleet and snow at Hartford, CT. The storm killed 11 in the Midwest and East. Wind gusts to 101 mph at Somesville, ME.
Mid-Atlantic/ East Coast (1936)