Cold and unstable weather persists in the western United States until next week



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Below normal temperatures will accompany rain and snow events in the western United States until next week.

"The storm accompanied by fresh air will continue in the Pacific and southwestern states until half of next week and beyond," said Jack Boston, senior meteorologist at AccuWeather.

While Californian residents may breathe a sigh of relief that no wind, rain, and snow re-appear in the storm last week, cold, unstable weather can slow down cleanup and restoration efforts. 'energy.

A cold system will dive south along the Pacific coast until the end of the weekend.

On Sunday, 1 to 2 extra feet of snow could accumulate on the Sierra Nevada's highest terrain, including the Donner Pass, at the peak of the snow mountains that fell last week.

This will add even more pressure to mountain cities struggling to find places to pile snow and crews trying to clear the roads.

So much snow fell late last week that several Lake Tahoe roads were closed, forcing skiers to cancel their plans, according to the Associated Press.

Related: Winter Storms and Weather in the United States – January 2019

22 PICTURES

Winter storms and weather conditions in the United States – January 2019

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James Spanos pushes a cart of his belongings in a snowy street during a winter storm on Sunday, January 20, 2019 in Portland, Maine. Scarves, hoods and gloves were needed for New England residents who ventured outdoors, while the region experienced a storm that could dump up to 18 inches of snow. (AP Photo / Robert F. Bukaty)

The horses stand on a major winter storm that dropped about 20 inches of snow in Taos, New Mexico, United States, on January 11, 2019. REUTERS / Andrew Hay

Caleb Seely rides a unicycle on a snowy sidewalk as he returns home after helping to shovel his brother's driveway during a winter storm on Sunday, January 20, 2019, in Portland, Ontario. Maine. The additional cleat tire from Seely offered traction on a day when snow, slush and freezing rain held most motorists inside. Parts of New England are preparing to receive up to 18 inches of snow. (AP Photo / Robert F. Bukaty)

Traffic passed through downtown after the major winter storm fell about 8 inches of snow in Taos, New Mexico, United States, January 11, 2019. REUTERS / Andrew Hay

Don Locke of Pottsville, Pennsylvania, removes snow and ice from his car along 12th Street in Pottsville, Pennsylvania, on Sunday, January 20, 2019. (Andy Matsko / The Republican-Herald via AP)

A couple takes pictures at the frozen fountain at Bryant Park on January 11, 2019 in New York. New York City has been hit by bitter temperatures and high winds. – The minimum for Friday was 22 Farenheit (-5.5 Celsius) (Photo by Don EMMERT / AFP) (The photo credit should match DON EMMERT / AFP / Getty Images)

Motorists are trying to repair their windshield wipers during a winter storm on Sunday, January 20, 2019 in Portland, Maine. Snow, melted snow and freezing rain make movement dangerous in most of New England. (AP Photo / Robert F. Bukaty)

People take pictures of the frozen fountain at Bryant Park on January 11, 2019 in New York. New York City has been hit by bitter temperatures and high winds. – The minimum for Friday was 22 Farenheit (-5.5 Celsius) (Photo by Don EMMERT / AFP) (The photo credit should match DON EMMERT / AFP / Getty Images)

Crews clear the snow at the Albany International Airport at Colony, NY, on Sunday, January 20, 2019. A major winter storm that covered much of the Midwest with snow earlier in the weekend was swept by New England, where it should disrupt transportation. the devastation caused by slippery and clogged roads to hundreds of canceled flights. (AP Photo / Hans Pennink)

The birds play in the frozen fountain of Bryant Park on January 11, 2019 in New York. New York City has been hit by bitter temperatures and high winds. The decline for Friday was 22 Farenheit (-5.5 Celsius) (Photo by Don EMMERT / AFP) (The photo credit should match DON EMMERT / AFP / Getty Images)

Lakewood CO – JANUARY 11: Meredith Mills delivers the caddies in King Soppers on January 11, 2019 in Lakewood, Colorado. The snow continues to fall in the metropolitan area. (Photo by RJ Sangosti / The Denver Post via Getty Images)

Silver Springs, MD – January 9: Emmi Horne, 8, tries to catch snowflakes on her toungue as she walks through downtown Silver Spring, Maryland, during a brief gust of wind snow with his mother, Terry Horne, right. (Photo by Bill O 'Leary / The Washington Post via Getty Images)

BOSTON, MA – JANUARY 8: A pedestrian crosses a light snow cover on a sidewalk on Columbia Road in the Dorchester neighborhood of Boston on January 8, 2019. (Photo by Jonathan Wiggs / The Boston Globe via Getty Images)

The waves of the East River are visible in front of the Brooklyn Bridge and the Manhattan skyline in New York on January 7, 2019. (Photo by Johannes EISELE / AFP) (The photo credit should match JOHANNES EISELE / AFP / Getty Images)

Keith Morris, of the Owensboro City Streets Department, removes a pipe after loading 1,000 gallons of salt brine into a tank in a truck on the Friday afternoon of January 11, 2019, so that he can not wait. It may be spilled on city roads in Owensboro, Kentucky The National Weather Service on Friday issued a weather advisory regarding snow accumulation in the area, Friday night to early Saturday. (Alan Warren / The Messenger-Inquirer via AP)

Traffic follows I-70 near Lawrence, Kansas on Friday, January 11, 2019, in anticipation of a snowstorm. The area is subject to a winter weather warning. (AP Photo / Orlin Wagner)

A plow treats the Douglas County Highway 438 near Lawrence, Kansas on Friday, January 11, 2019, in anticipation of a snowstorm. The area is subject to a winter weather warning. (AP Photo / Orlin Wagner)

A pedestrian crosses the street in downtown Scranton, Pennsylvania, on Sunday, January 20, 2019. A severe winter storm caused the coldest temperatures of the season and covered a vast expanse of snow-covered snow while It caused havoc. Air travel and roads in bad condition all through Sunday in New England. (Butch Comegys / The Times-Tribune via AP)

Marvin Hooks wears a mask to protect him from the cold as he walked down North Street in Pittsfield, Massachusetts, on Monday, January 21, 2019. An icy wind and gusty winds blew Monday in the east of United States. snow. (Ben Garver / The Berkshire Eagle via AP)

A runner crosses West Park north of Pittsburgh on Sunday, January 20, 2019. A major winter storm caused some of the coldest temperatures of the season and covered a vast swath of snow-covered country as it wreaked havoc in air travel. and caused slippery road conditions throughout New England Sunday. (AP Photo / Gene J. Puskar)

Dan Cappella of Pottsville, Pennsylvania, clears snow on Howard Avenue in Pottsville, Pennsylvania, on Sunday, January 20, 2019. (Andy Matsko / The Republican-Herald via AP)

Ben Jennings cleared his driveway on Sunday, January 20th in Glenville, New York State, where 16 inches of snow fell from Saturday night to Sunday noon. (AP Photo / Mary Esch)




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Those who venture into Sierra Nevada at the beginning of the week will have to exercise the utmost caution, as the roads will remain dangerous and the danger of avalanche high.

Travelers passing through the Siskiyou summit of Interstate 5 in Oregon will also be wary of snowy, slippery roads until Sunday.

In southern California, snow levels will drop between 1,500 and 2,000 feet by Sunday night, which may allow snow accumulation in the foothills and some valleys, according to Bob Smerbeck, a senior meteorologist at AccuWeather.

Low snow levels can create travel difficulties for people driving in the Grapevine and along parts of Highways 14 and 138, with reduced visibility and snowy, icy roads.

The winds blow and drift the snowfall.

Residents of Flagstaff and surrounding areas in Arizona will also face snow conditions this weekend, with the heaviest snowfall and the worst travel conditions on Sunday night.

Outside winter conditions, rain showers, perhaps accompanied by a few thunderclaps, will sweep the California coast and the central valley over the weekend.

In addition to frequent lightning, any thunderstorms that occur can produce small hail.

Cold air will set in behind the storm, with possible record lows from Redding to Sacramento, Santa Barbara and Los Angeles, California, early this week.

"Temperatures will average 5-15 degrees Fahrenheit below normal until next week in most of the West," Boston said.

As the Pacific states dry out early in the week, the cold, as well as the threat of snow and slips, will spread to Denver and Albuquerque, New Mexico, from Monday to Tuesday.

The dry break for the west coast, however, will be short, as a new storm will extend south with rain and snow showers in the middle and at the end of the week.

This next storm will bring snowfall to the Sierra and Southern California mountains, and could cause significant snowfall in the Four Corners area.

Las Vegas has the potential to record its second snowfall of the season with this event.

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