Meg Jones cleans the snow off her car outside her house on 2nd Avenue in Scottsbluff, Neb., Tuesday morning, Nov. 16, 2019.

DENVER (AP) — Heavy snow and wind shut down highways Tuesday in Colorado and Wyoming, closed schools in Nebraska and forced more than 1,000 travelers to sleep overnight in Denver’s airport after hundreds of flights were canceled just as Thanksgiving travel moved into high gear.

The storm was heading to South Dakota, Iowa, Michigan, Minnesota and Wisconsin, while a “bomb cyclone” weather phenomenon began toppling trees, knocking out power and dumping snow as it barreled into California and Oregon — making for a double whammy of early wintry weather.

Authorities on both sides of the California-Oregon border reported numerous crashes and closed roads. The National Weather Service urged people to wait to travel for the holiday until the weather improves.

At Denver International Airport, about 10 inches (25 centimeters) of snow mixed with winds that limited visibility prompted the cancellation of about 30 percent of the airport’s average daily 1,600 flights.

The storm dumped nearly 3 feet (1 meter) of snow in parts of northern Colorado and closed long stretches of highways there and in Wyoming. One person was killed, and two others were injured when a tractor-trailer jackknifed and was hit by two other trucks on Interstate 70 near the Colorado ski town of Vail.

The system moved east, allowing the Denver airport to begin returning to normal.

Southwest Airlines canceled about 200 flights. Spokesman Brad Hawkins said it would take "a couple of days" to get stranded passengers on other flights because there are few during the pre-Thanksgiving travel crush. That makes it hard for airlines to rebook passengers.

About 1,100 people spent the night at the airport, including many cadets from the Air Force Academy near Colorado Springs who either missed flights or wanted to get to the airport before road conditions deteriorated, airport spokeswoman Alex Renteria said.

Among them was cadet Sadie Luhman, whose trip to the airport took three hours — twice the normal driving time. She got to the airport at 1 a.m., 10 hours before her scheduled flight to Chicago for Thanksgiving.

“I just wanted to beat the storm. We kind of left in the middle of it so it kind of didn’t work, but we got here,” she told Denver news station KCNC-TV.

Airport workers handed out blankets, diapers, baby formula, toothbrushes and toothpaste to passengers who camped out on floors and in chairs.

Many government offices closed in the Denver area and Cheyenne, Wyoming, along with colleges and schools not already on holiday break. In Nebraska, several school districts canceled classes Wednesday, and the southwestern city of Sidney had received about 8 inches (20 centimeters) of snow.

The University of Minnesota, Twin Cities, campus has canceled classes starting late Tuesday.

It wasn’t a snow day for everybody. Carli Webber cleared snow off her car and braced herself for her commute to a call center near Denver’s Union Station.

“I am not like a lot of people and cannot work from home, so I have no choice but to go,” she said.

Blizzard and wintry weather warnings extended into the Great Lakes states with the storm bringing high winds and snow to Michigan, Minnesota and Wisconsin later Tuesday and a chance of snow over the weekend for parts of New England, said Alex Lamers, a National Weather Service meteorologist.

“That could be a coast-to-coast storm,” he said.

The storm is expected to dump snow on the airport in Minneapolis, where Delta Air Lines is the major carrier, but most is expected to fall overnight when few flights are scheduled.

Delta prepared by filling de-icing tanks, calling in extra flight dispatchers and operations employees, and having some of its 20 in-house meteorologists focus on the Minneapolis forecast.

"The timing is very helpful," said Erik Snell, a Delta senior vice president who oversees operations. "It gives the airport time to clear the runways, although we'll have to watch the residual snowfall in the morning."

The storm system could mean disappointment for fans of the larger-than-life balloons flown at Macy’s Thanksgiving Day Parade in New York.

Organizers were preparing for the possibility of grounding the iconic balloon characters because of 40-50 mph (64-81 kph) gusts in the forecast. Rules put in place after several people were injured by a balloon years ago require lower altitudes or full removal if sustained winds exceed 23 mph (37 kph) and gusts exceed 34 mph (54 kph). The decision will be made on parade day.

The second storm began hitting the West Coast of the U.S., bringing snow to the mountains and wind and rain along the coasts of California and Oregon.

Multiple roads were closed in southern Oregon due to downed trees, power lines and blizzard-like driving conditions and others were reduced to a single lane, the Oregon Department of Transportation said.

The bomb cyclone — a rapid drop in air pressure — could bring waves of up to 35 feet (11 meters), wind gusts of up to 75 mph (120 kph) and heavy snow in the mountains.

Snow temporarily shut down part of Interstate 80 north of Lake Tahoe, near the Nevada-California line.

Angela Smith said the Oceanfront Lodge, a hotel she manages in Crescent City, in far Northern California, lost power briefly during rain and strong winds. She said the hotel is ready to withstand heavy downpours.

“It’s blowing pretty good outside but because we’re right on the coast, everything was built to ensure the safety of people,” Smith said.

Forecasters warned of “difficult to impossible travel conditions” across much of northern Arizona later this week as that storm dumps about 2 feet (61 centimeters) of snow.  The approaching storm accelerated the annual winter closure of the highway leading to the North Rim of the Grand Canyon by five days.

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Koenig reported from Dallas. Associated Press writers Thomas Peipert in Denver, Bob Moen in Cheyenne, Wyoming, Olga R. Rodriguez in San Francisco, Gillian Flaccus in Portland, Oregon, Jeff Baenen in Minneapolis, Scott Sonner in Reno, Nevada, and Paul Davenport in Phoenix contributed to this report. Associated Press photographer David Zalubowski in Denver contributed.

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This version has been corrected to show that average number daily flights at Denver International Airport is 1,600, not 1,500.

Two men point toward plane arrivals on a flight information board at San Francisco International Airport in San Francisco, Tuesday, Nov. 26, 2019. Northern California and southern Oregon residents are bracing for a 'bomb cyclone' that's expected at one of the busiest travel times of the year. (AP Photo/Jeff Chiu)
Ezra Allen sleeps while waiting to board a flight to Tampa Bay at San Francisco International Airport in San Francisco, Tuesday, Nov. 26, 2019. Northern California and southern Oregon residents are bracing for a 'bomb cyclone' that's expected at one of the busiest travel times of the year. (AP Photo/Jeff Chiu)
In this still image taken from a Caltrans remote video traffic camera, traffic is stopped along Interstate 80 because of multiple spinouts, Tuesday, Nov. 26, 2019, in Truckee, Calif. Northern California and southern Oregon residents are bracing for a
A woman carries an umbrella while walking in the rain in San Francisco, Tuesday, Nov. 26, 2019. Northern California and southern Oregon residents are bracing for a 'bomb cyclone' that's expected at one of the busiest travel times of the year. (AP Photo/Jeff Chiu)
A maintenance man uses a snowblower to clear a sidewalk along 8th Ave. near Lincoln St. as a storm packing snow and high winds sweeps in over the region Tuesday, Nov. 26, 2019, in Denver. Stores, schools and government offices were closed or curtailed their hours while on another front, Thanksgiving Day travellers were forced to wrestle with snow-packed roads and flight delays or cancellations throughout the intermountain West. (AP Photo/David Zalubowski)
A pedestrian makes her way across empty Speer Blvd. as a storm packing snow and high winds sweeps in over the region Tuesday, Nov. 26, 2019, in Denver. Stores, schools and government offices were closed or curtailed their hours while on another front, Thanksgiving Day travellers were forced to wrestle with snow-packed roads and flight delays or cancellations throughout the intermountain West. (AP Photo/David Zalubowski)
A long line of parked vehicles sits covered with snow as a snowstorm sweeps in over the region Tuesday, Nov. 26, 2019, in Denver. Stores, schools and government offices were closed or curtailed their hours while on another front, Thanksgiving Day travellers were forced to wrestle with snow-packed roads and flight delays or cancellations throughout the intermountain West. (AP Photo/David Zalubowski)
A maintenance man uses a snowblower to clear a sidewalk outside a condominium complex along Grant Street as a storm packing snow and high winds sweeps in over the region Tuesday, Nov. 26, 2019, in Denver. Stores, schools and government offices were closed or curtailed their hours while on another front, Thanksgiving Day travellers were forced to wrestle with snow-packed roads and flight delays or cancellations throughout the intermountain West. (AP Photo/David Zalubowski)
Martin Rabago shovel snow from a walkway in Scottsbluff, Neb., Tuesday, Nov. 26, 2019.
Szymon Lobocki, a rocket engineer from Denver, clears off his Subaru to drive to work in a south suburb as a storm packing snow and high winds sweeps in over the region Tuesday, Nov. 26, 2019, in Denver. Stores, schools and government offices were closed or curtailed their hours while on another front, Thanksgiving Day travelers were forced to wrestle with snow-packed roads and flight delays or cancellations throughout the intermountain West. (AP Photo/David Zalubowski)
Passengers wait to pass through security gates at San Francisco International Airport in San Francisco, Tuesday, Nov. 26, 2019. Northern California and southern Oregon residents are bracing for a 'bomb cyclone' that's expected at one of the busiest travel times of the year. (AP Photo/Jeff Chiu)
Tuesday's snow called for a snowball fight for the three McKean boys as David, takes aim at his older brother, Ethan Tuesday, Nov. 26, 2019. Younger brother Josiah (5) tried to stay out of the line of fire as the battle raged around him at their home in Scottsbluff, Neb. (Brad Staman/The Star-Herald via AP)
Snow stacks up on the tables on the outside patio of a restaurant as a storm packing snow and high winds sweeps in over the region Tuesday, Nov. 26, 2019, in Denver. Stores, schools and government offices were closed or curtailed their hours while on another front, Thanksgiving Day travellers were forced to wrestle with snow-packed roads and flight delays or cancellations throughout the intermountain West. (AP Photo/David Zalubowski)
Carli Webber of Denver clears off her sports-utility vehicle to head to work as a storm packing snow and high winds sweeps in over the region Tuesday, Nov. 26, 2019, in Denver. Stores, schools and government offices were closed or curtailed their hours while on another front, Thanksgiving Day travellers were forced to wrestle with snow-packed roads and flight delays or cancellations throughout the intermountain West. (AP Photo/David Zalubowski)
Bicycles used in the city of Denver's Bicycle sharing program are covered in snow as a storm packing snow and high winds sweeps in over the region Tuesday, Nov. 26, 2019, in Denver. Stores, schools and government offices were closed or curtailed their hours while on another front, Thanksgiving Day travellers were forced to wrestle with snow-packed roads and flight delays or cancellations throughout the intermountain West. (AP Photo/David Zalubowski)
A lone motorist struggles down Washington Street as a storm packing snow and high winds sweeps in over the region Tuesday, Nov. 26, 2019, in Denver. Stores, schools and government offices were closed or curtailed their hours while on another front, Thanksgiving Day travellers were forced to wrestle with snow-packed roads and flight delays or cancellations throughout the intermountain West. (AP Photo/David Zalubowski)
Hanne Murray clears the snow off her car before heading to work Tuesday morning, Nov. 26, 2019, in the Patty Jewett neighborhood of Colorado Springs, Colo. Downtown Colorado Springs reported about six inches of snow overnight will parts of El Paso County tallied more than a foot of snow from the storm. (Christian Murdock/The Gazette via AP)
Erik Randa helps dig out a stuck Chevrolet Malibu being used by a ride-sharing service driver out of an intersection at 2nd Ave. and Pearl St. as a storm packing snow and high winds sweeps in over the region Tuesday, Nov. 26, 2019, in Denver. Stores, schools and government offices were closed or curtailed their hours while on another front, Thanksgiving Day travellers were forced to wrestle with snow-packed roads and flight delays or cancellations throughout the intermountain West. (AP Photo/David Zalubowski)
Ryan Lusk, a native of Duluth, Miin., who nows lives in Denver, heads out of a grocery store with his purchases as a storm packing snow and high winds sweeps in over the region Tuesday, Nov. 26, 2019, in Denver. Stores, schools and government offices were closed or curtailed their hours while on another front, Thanksgiving Day travellers were forced to wrestle with snow-packed roads and flight delays or cancellations throughout the intermountain West. (AP Photo/David Zalubowski)
University of Northern Colorado facilities management staff Francis Garza, left, and Tina Longoria shovel snow from the steps and entranceway to Sabin Hall during a winter storm in Greeley, Colo. Tuesday, Nov. 26, 2019. The storm is expected to dump at least a foot of snow on Greeley by Tuesday night and caused the closure of school districts, the Greeley and Weld County government offices, and the University of Northern Colorado. (Alex McIntyre/The Greeley Tribune via AP)
A City of Greeley snowplow plows the westbound lanes of 20th Street during a winter storm in Greeley, Colo. Tuesday, Nov. 26, 2019.  The storm is expected to dump at least a foot of snow on Greeley by Tuesday night and caused the closure of school districts, the Greeley and Weld County government offices, and the University of Northern Colorado. (Alex McIntyre/The Greeley Tribune via AP)
University of Northern Colorado student Jared Henderson braves the snow on the UNC campus to get breakfast during a winter storm in Greeley, Cold. Tuesday, Nov. 26, 2019. The storm is expected to dump at least a foot of snow on Greeley by Tuesday night and caused the closure of school districts, the Greeley and Weld County government offices, and the University of Northern Colorado. (Alex McIntyre/The Greeley Tribune via AP)
Sporadic traffic moves north on 11th Avenue near the University of Northern Colorado during a winter storm in Greeley, Colo. Tuesday, Nov. 26, 2019. (Alex McIntyre/The Greeley Tribune via AP)
University of Northern Colorado facilities management staff Francis Garza, left, and Tina Longoria shovel snow from the steps and entranceway to Sabin Hall during a winter storm in Greeley, Colo. Tuesday, Nov. 26, 2019. The storm is expected to dump at least a foot of snow on Greeley by Tuesday night and caused the closure of school districts, the Greeley and Weld County government offices, and the University of Northern Colorado. (Alex McIntyre/The Greeley Tribune via AP)
City of Denver snowplows clear the eastbound lanes of Speer Blvd. as a storm packing snow and high winds sweeps in over the region Tuesday, Nov. 26, 2019, in Denver. Stores, schools and government offices were closed or curtailed their hours while on another front, Thanksgiving Day travellers were forced to wrestle with snow-packed roads and flight delays or cancellations throughout the intermountain West. (AP Photo/David Zalubowski)
FILE - In this Nov. 21, 2018, file photo, travelers wait in long lines to pass through a security checkpoint at Denver International Airport in Denver. Thanksgiving travel is an ordeal under the best of circumstances, and a one-two punch of bad weather threatens to make it even more exhausting. There's a forecast for heavy snow in Denver, and another storm will crash into the West Coast, possibly fouling flights and making driving treacherous. (AP Photo/David Zalubowski, File)
This Nov. 20, 2019, photo shows traffic moving slowly along the Mount Rose Highway after a good dusting of snow covered the mountains near Reno, Nev. Thanksgiving travel is an ordeal under the best of circumstances, and a one-two punch of bad weather threatens to make it even more exhausting. (Andy Barron/The Reno Gazette-Journal via AP)
This Nov. 20, 2019, photo shows traffic moving slowly along the Mount Rose Highway after a good dusting of snow covered the mountains near Reno, Nev. Thanksgiving travel is an ordeal under the best of circumstances, and a one-two punch of bad weather threatens to make it even more exhausting. (Andy Barron/The Reno Gazette-Journal via AP)
FILE - In this Nov. 21, 2018, file photo, travelers pass by a map of the United States on the way to a security checkpoint at Denver International Airport in Denver. Thanksgiving travel is an ordeal under the best of circumstances, and a one-two punch of bad weather threatens to make it even more exhausting. There's a forecast for heavy snow in Denver, and another storm will crash into the West Coast, possibly fouling flights and making driving treacherous. (AP Photo/David Zalubowski, File)