Share this article:
Rain, snow and cold air will return to the Northwestern states into Thanksgiving.
A storm system will dive southward along the West Coast into Tuesday night before tracking eastward across the Rockies during Wednesday into Thanksgiving Day.
The strength and track of this storm system will determine which locations receive the heaviest snowfall on the cold side of this system.
The amount of moisture available with this system will be much less than the previous storms this month across the Pacific Northwest. While much of the lower elevations will deal with periods of rain through Tuesday, the threat for flash flooding will be low.
Much of the precipitation along the Interstate 5 corridor from Seattle to Portland, Oregon, will be in the form of rain into Tuesday night.
A steady snow will blanket the Oregon Cascades. Significant snowfall will also occur across the Bitterroot Mountains of Idaho and western Montana as well as the Sierra Nevada.
As this system tracks south and east this week, a shot of cold air from Canada will dive across the region behind this storm. This will allow snowflakes to make an appearance across some of the lower elevations for the first time this season.
“The low elevations east of the Cascades have an opportunity to receive accumulating snow into Wednesday, especially in eastern Oregon," AccuWeather Senior Meteorologist Kristina Pydynowski said.
Those traveling for Thanksgiving across the Northwest through Tuesday should give yourself extra time to reach your destination as roads will be wet or perhaps snow-covered and icy.
Anyone waiting to travel on Wednesday should see improving conditions across the Pacific Northwest as the storm will set its sights across the northern and central Rockies into Nevada. Those traveling in these areas may want to consider leaving before Wednesday before the storm approaches.
“The snow will focus on the corridor from Montana and Wyoming to eastern Oregon and the Sierra on Wednesday,” Pydynowski said.
Plowable snow could accumulate across the northern Rockies including Billings, Montana; Casper, Wyoming; and Salt Lake City on Wednesday into Wednesday night.
The best opportunity for snowflakes to make an appearance in Boise, Idaho, is on Wednesday. Snow is expected to accumulate mainly on non-paved surfaces, but roads could become snow covered.
Overnight low temperatures will plunge near or below freezing across much of the Western states into Thanksgiving. Locations along the Pacific Coast will remain above freezing.
Anyone traveling after dark will need to use caution as wet roads could start to freeze.
Daytime high temperatures across much of the northern and central Rockies will fail to reach the freezing mark on Wednesday and Thursday. This will not allow all of the snow that falls this week to melt before the Thanksgiving holiday.
Those flying for the holiday across the West should keep checking your airline for any possible delays or cancellations.
Snow showers could continue to occur across portions of the central Rockies on Thanksgiving Day.
Comments that don't add to the conversation may be automatically or manually removed by Facebook or AccuWeather. Profanity, personal attacks, and spam will not be tolerated.
Some relief is on the way to the hard-hit Indian state of Kerala, where the death toll from incessant monsoon downpours has exceeded 320.
Residents of western Japan are being put on alert for strengthening Typhoon Soulik to pose serious threats to lives and property Tuesday into Wednesday. Dangers may also spread to South Korea.
In the distant footsteps of Hurricane Hector, Hurricane Lane is forecast to experience a similar evolution and take a similar path just south of the Big Island of Hawaii next week.
Residents across parts of the United Kingdom will want to keep wellies and brollies handy as Ernesto sweeps rain through this weekend.
Wet weather continued to wreak havoc across parts of the northeastern United States this week while a major bridge collapse killed dozens amid severe storms in Italy.
Autumn will feel like a continuation of summer across much of Germany as above-normal temperatures prevail well into October.
After a warmer-than-normal summer for much of the United Kingdom, mild air will continue into the autumn season.
Despite weakening, Rumbia will continue to plague eastern China with flooding rain into early next week.