01:17 Making Snowflakes Any Time of the Year The Weather Channel meteorologist Kelly Cass looks at how you can make a snowflake any season of the year.

At a Glance Officials ask people to stay off the roads on Monday.

Snow is causing trucks to jackknife and cars to spinout.

Dozens of school districts canceled Monday classes.

A search-and-rescue team member was killed and two others hurt in a crash during heavy rain.

Snow from the latest storm system to hit the Northwest has authorities asking people to stay off the roads Monday, while further south mudslides continued to block roads.

From the Sierra Nevada to Seattle, snow-covered roads are causing cars to spin out and tractor trailers to jackknife.

CalTrans said a jackknifed truck caused several crashes on Interstate 80 early Monday morning. Eastbound traffic was held at Castle Peak for more than two hours. About 30 miles down the interstate at Alta, spinouts caused I-80 to be closed again . Whiteout conditions closed State Road 88 at Carson Pass.

State troopers in Washington were dealing with a number of spinouts on Interstate 5 near Lynnwood, about 15 miles north of Seattle.

Seattle-Tacoma International Airport had 3 inches of snow by early Monday. As of 5:30 a.m. local time, 16 flights into and out of Seattle were canceled, according to flightaware.com.

Snow totals were higher north of the city with 10 inches reported in North Bend, 8 in Marysville and 6 in Redmond.

Many Washington students will wake up to learn they have a snow day with dozens of districts canceling classes because of the snow.

More than 16,000 customers were without electricity in Washington as of 5 a.m. local time, according to poweroutage.us. Nearly 7,000 remained in the dark in California.

A large boulder fell onto State Road 84 in Freemont, California, and caused a collision , ABC 7 reported. The Alameda County Fire said the road could be shut down in both directions for a day or two.

All of the San Francisco Bay Area was experiencing a messy morning commute.

All this is being caused by the second of two powerful storm systems. The first moved ashore on Friday bringing downpours and high winds to much of California.

On Saturday, power was knocked out for tens of thousands, evacuation orders were issued and heavy rain, snow and high winds made driving treacherous.

(MORE: Another Wintry Mess to Spread From the West to Midwest)

A Ventura County search-and-rescue team member died in a crash about 7:30 Saturday morning on northbound Interstate 5 near Gorman, ABC 7 reported. Two other team members were injured, one of them critically and the other had minor injuries. The group, on their way to a training exercise, saw another crash and stopped to help. Another vehicle plowed into them. At least six other people were involved in the crashes that occurred near Pyramid Lake during a heavy rainstorm. Their conditions were unavailable.

The sheriff's office identified the victim as Jeff Dye, a volunteer with the Fillmore Mountain Search and Rescue Team, the Los Angeles Times reported.

The California Highway Patrol reported Saturday that rain caused a debris flow that washed boulders and rocks onto northbound Interstate 5 near Grapevine. Mudflows and water also closed all of U.S. 101 from Milpas Street in Santa Barbara to Sheffield Drive in Montecito. A rock slide and debris closed State Road 1 between Gaviota and Lompoc. State Road 135 from Santa Maria to Los Alamos was closed because of water in low lying areas.

Talk show host Ellen DeGeneres was one of the people who couldn't get out of Montecito because of the mud. U.S. 101 was reopened Saturday night.

Even as some major routes reopened to traffic, CalTrans was still working to remove mudslides from others.

The Pacific Coast Highway was closed from Las Posas Road to Broad Beach because of mudslides from burn scars. It remained closed Sunday morning from Las Posas to Trancas Canyon Road.

Other roadways that remained closed as of noon Sunday (local time) included the right lane of northbound U.S. 101 from State Beaches to Seacliff; State Road 33 from Fairview Road to Lockwood Valley Road, State Road 23 from PCH to upper Mulholland Highway, CalTrans tweeted.

On Saturday, muddy brown water raged down a neighborhood street in Malibu, dragging boulders and tree limbs with it, ABC 7 reported. Video showed the water was about 4 or 5 feet deep.

Midday Saturday, the Los Angeles County Sheriff Department issued mandatory evacuations for the Malibu West neighborhood , the Paseo Canyon area and Agoura Hills .

At times Saturday, more than 40,000 customers were without electricity. That number was just under 23,000 as of 9:30 a.m. local time Saturday, Poweroutage.us reported. Falling tree limbs caused many of the outages.

Trees and power lines fell overnight on Bohemian Highway in Sonoma County, knocking out power to about 500 people , KPIX reported. The Monte Rio Fire Department cut up one of the trees blocking the road to allow emergency vehicles to get through. The Los Angeles County Sheriff's Office also reported trees and power lines down on several roadways.

Wind gusts up to 83 mph were measured in the seaside town of Gaviata, California, in Santa Barbara County, the National Weather Service said.

The California Highway Patrol said blowing dust on State Road 99 south of Bakersfield had reduced visibility to about a half mile.

A total of 69 flights into and out of San Francisco were canceled Saturday, according to flightaware.com. There were 19 cancellations in Los Angeles and 18 in San Diego. Only a small handful of flights were canceled on Sunday.

The San Francisco Chronicle reported a number of Bay Area highways flooded, including Interstate 680 in Dublin and Interstate 280 in San Jose.

Chains were required for vehicles traveling through the Sierra Nevada region, CalTrans tweeted. The transportation agency closed westbound Interstate 80 for about an hour around noon at the Nevada state line and eastbound at Drum because of accidents and spinouts.

On Friday, Santa Barbara County ordered evacuations of areas near burn scars from the Thomas, Whittier and Sherpa fires, the Associated Press reported.

Just over a year ago, 21 people were killed when heavy rain at the Thomas Fire burn scar unleashed a massive debris flow that destroyed or damaged hundreds of homes in the seaside community of Montecito.

On Saturday, flash flood warnings were issued for the areas near the Whittier and Sherpa fire scars, the National Weather Service said.

The Santa Barbara Fire Department said several motorists were stuck when streets flooded .

The Ventura County Sheriff's Office also ordered evacuations in areas burned in the Woolsey Fire, and residents of Malibu were advised to leave.

Voluntary evacuations were ordered in Riverside County in the burn areas affected by the Holy and Cranston fires.

In addition to the evacuation orders, voluntary evacuations took effect at 5 a.m. Saturday morning for Burbank residents who live along Country Club Drive above Via Montana , a separate L.A. Times article reported.