Chilly, unsettled weather to persist in western U.S. into next week

Below-normal temperatures will accompany bouts of rain and snow across the western United States through next week.

"A stormy pattern with chilly air will continue for the Pacific states and into the Southwest through the middle of next week and beyond," AccuWeather Senior Meteorologist Jack Boston said.

While California residents can breath a sigh of relief that no storms bringing a repeat of last week's wind, rain and snow are forecast, the chilly, unsettled weather can put a damper on continued cleanup and power restoration efforts.

A cold system will dive southward along the Pacific Coast into the end the weekend.

Through Sunday, an additional 1-2 feet of snow may pile up across the highest terrain of the Sierra Nevada, including Donner Pass, on top of the mountains of snow that fell last week.

This will add further strain to mountain towns struggling to find places to pile the snow and crews trying to keep roads clear.

So much snow fell late this past week that several routes to Lake Tahoe were shut down, forcing skiers to cancel plans, according to the Associated Press.

Related: Winter storms and weather across the United States — January 2019

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Winter storms and weather across the United States -- January 2019
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Winter storms and weather across the United States -- January 2019
James Spanos pushes a cart of his belongings on a snow-covered street during a winter storm, Sunday, Jan. 20, 2019, in Portland, Maine. Scarves, hoods and gloves were necessary for New England residents venturing outdoors as the region endures a storm that can dump up to 18 inches of snow. (AP Photo/Robert F. Bukaty)
Horses stand over a major winter storm which dropped around 8 inches of snow in Taos, New Mexico, U.S., January 11, 2019. REUTERS/Andrew Hay
Caleb Seely rides a unicycle on a snow covered sidewalk as he heads home after helping shovel out his brother's driveway during a winter storm, Sunday, Jan. 20, 2019, in Portland, Maine. The extra knobby tire on Seely's ride provided traction on a day when snow, sleet and freezing rain kept most motorists indoors. Parts of New England residents are bracing for up to 18 inches of snow. (AP Photo/Robert F. Bukaty)
Traffic moved through the town center after a major winter storm dropped around 8 inches of snow in Taos, New Mexico, U.S., January 11, 2019. REUTERS/Andrew Hay
Don Locke, of Pottsville, Pa., clears snow and ice from his car along 12th Street in Pottsville, Pa., on Sunday, January 20, 2019. (Andy Matsko/The Republican-Herald via AP)
A couple takes photos at the frozen fountain in Bryant Park January 11, 2019 in New York. New York City was hit with bitter temperatures and high winds. - The low for Friday was 22 Farenheit (-5.5 Celsius) (Photo by Don EMMERT / AFP) (Photo credit should read DON EMMERT/AFP/Getty Images)
Motorists try to fix their windshield wipers during a winter storm, Sunday, Jan. 20, 2019, in Portland, Maine. Snow, sleet and freezing rain is making travel hazardous throughout much of New England. (AP Photo/Robert F. Bukaty)
People take photos of the frozen fountain in Bryant Park on January 11, 2019 in New York. New York City was hit with bitter temperatures and high winds. - The low for Friday was 22 Farenheit (-5.5 Celsius) (Photo by Don EMMERT / AFP) (Photo credit should read DON EMMERT/AFP/Getty Images)
Crews clear snow at the Albany International Airport in Colonie, N.Y., Sunday, Jan. 20, 2019. A major winter storm that blanketed much of the Midwest with snow earlier in the weekend is barreling toward New England, where it is expected to wreak transportation havoc from slick and clogged roads to hundreds of canceled airline flights. (AP Photo/Hans Pennink)
Birds play in the frozen fountain in Bryant Park January 11, 2019 in New York. New York City was hit with bitter temperatures and high winds. The low for Friday was 22 Farenheit (-5.5 Celsius) (Photo by Don EMMERT / AFP) (Photo credit should read DON EMMERT/AFP/Getty Images)
Lakewood CO - JANUARY 11: Meredith Mills pushes shopping carts back into King Soppers on January 11, 2019 in Lakewood, Colorado. Snow continues to fall in the metro area. (Photo by RJ Sangosti/The Denver Post via Getty Images)
SILVER SPRING, MD - JAN 9: Emmi Horne, 8, tries to catch snowflakes on her toungue as she walks through downtown Silver Spring, Maryland during a brief snow squall with her mom, Terry Horne, right. (Photo by Bill O'Leary/The Washington Post via Getty Images)
BOSTON, MA - JANUARY 8: A pedestrian passes through a light dusting of snow on a Columbia Road sidewalk in the Dorchester neighborhood of Boston on Jan. 8, 2019. (Photo by Jonathan Wiggs/The Boston Globe via Getty Images)
Waves from the East River are seen in front of the Brooklyn Bridge and the skyline of Manhattan in New York on January 7, 2019. (Photo by Johannes EISELE / AFP) (Photo credit should read JOHANNES EISELE/AFP/Getty Images)
Keith Morris, of the City of Owensboro's Street Department, takes off a hose after loading 1,000 gallons of salt brine into a tank on a truck, Friday afternoon, Jan. 11, 2019, so it can be spread on city roads in Owensboro, Ky. The National Weather Service had issued a winter weather advisory on Friday of accumulating snow moving into the area Friday evening into early Saturday. (Alan Warren/The Messenger-Inquirer via AP)
Traffic moves along I-70 near Lawrence, Kan., Friday, Jan. 11, 2019 ahead of an expected snow storm. The area is under a Winter Weather Advisory. (AP Photo/Orlin Wagner)
A plow treats Douglas County Road 438 near Lawrence, Kan., Friday, Jan. 11, 2019 ahead of an expected snow storm. The area is under a Winter Weather Advisory. (AP Photo/Orlin Wagner)
A pedestrian walks across the street in downtown Scranton, Pa., on Sunday, Jan. 20, 2019. A major winter storm brought some of the coldest temperatures of the season and covered a large swath of the country in snow as it wreaked havoc on air travel and caused slick road conditions throughout New England Sunday. (Butch Comegys/The Times-Tribune via AP)
Marvin Hooks wears a face mask to protect him from the cold as he walks on North Street in Pittsfield, Mass., Monday, Jan. 21, 2019. Bitter cold and gusty winds swept across the eastern U.S. Monday with falling temperatures replacing the weekend's falling snow. (Ben Garver/The Berkshire Eagle via AP)
A runner moves through West Park on the Northside of Pittsburgh on Sunday, Jan. 20, 2019. A major winter storm brought some of the coldest temperatures of the season and covered a large swath of the country in snow as it wreaked havoc on air travel and caused slick road conditions throughout New England Sunday. (AP Photo/Gene J. Puskar)
Dan Cappella, of Pottsville, Pa., clears snow away on Howard Avenue in Pottsville, Pa., on Sunday, January 20, 2019. (Andy Matsko/The Republican-Herald via AP)
Ben Jennings snowblows his driveway on Sunday, Jan. 20, in Glenville, N.Y., where 16 inches of snow fell from Saturday evening through noon Sunday. (AP Photo/Mary Esch)
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Those who do venture into the Sierra Nevada into early week will need to use extreme caution as roads are likely to remain treacherous and the avalanche danger will remain high.

Travelers over Interstate 5's Siskiyou Summit in Oregon will also need to be cautious of snow-covered, slippery roadways into Sunday.

In Southern California, snow levels will drop to around 1,500-2,000 feet by Sunday night, which can allow accumulating snow in the foothills and some valleys areas, according to AccuWeather Senior Meteorologist Bob Smerbeck.

The low snow levels can create travel difficulties for people driving through the Grapevine and along portions of highways 14 and 138, with reduced visibility and snowy, icy roads possible.

Gusty winds will cause any snowfall to blow and drift.

People in and around Flagstaff, Arizona, will also have to contend with snowy conditions this weekend, with the heaviest snowfall and worst travel conditions expected on Sunday night.

Outside of the wintry conditions, rain showers, with perhaps a few rumbles of thunder, will sweep along the California coast and Central Valley through the weekend.

Any thunderstorms that do pop up can produce small hail, in addition to frequent lightning.

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

"Temperatures will average 5-15 degrees Fahrenheit below normal through next week across the much of the West," Boston said.

As the Pacific states dry out early in the week, the cold, along with the threat for snow and slippery travel, will spread into Denver and Albuquerque, New Mexico, Monday into Tuesday.

The dry break for the West Coast will only be brief, however, as a new storm will sweep southward with rain and snow showers during the middle and latter part of the week.

This next storm will return snowfall to the Sierra and Southern California mountains, and could unleash significant snowfall in the Four Corners region.

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

 

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