The companies have canceled 27 flights at O'Hare and two at Midway as people scramble to get home on the year's busiest travel weekend.
Over 6,800 flights within, into or out of the USA were delayed on Saturday, with the biggest issues at hubs including Denver, Minneapolis and Chicago's O'Hare International.
The NWS issued a Winter Storm Watch and Hazardous Weather Advisory in the northern part of the state from Sunday to 7 a.m. Tuesday.
Combined, these two storms are expected to extinguish the fall fire season across California but also a start to a potentially wet winter.
This system is also bring in strong winds. Wind gusts up to 50 miles per hour (80 kph) created ground blizzards.
Across the state, precipitation is expected to wind down Tuesday morning, with rain rapidly tapering off in Boston between 8 and 10 a.m., she said.
All roads in and out of Casper were closed Saturday morning, including the entire 300-mile stretch (483-kilometer) of Interstate 25 in Wyoming.
Harbor Drive is closed near the Duluth Entertainment Convention Center on Saturday because of flooding amid blizzard conditions affecting Duluth. North of there, though, the mixed bag will continue with plain snow likely falling from around I-84 north. Rain could become heavy at times from I-78 south, including the New York City metro area later on Sunday.
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According to the National Christmas Tree Association, Americans bought more trees last year and are expected to again this year. Keith Young moves Christmas Trees at the Plantation Garden Centre on 4th Street N.W.in Calgary on Thursday, November 28, 2019.
"Please be patient with plow drivers as this is expected to be a historic storm", the city reported in a news release Saturday.
The millions of US travelers who battled a nightmarish mix of winter weather en route to their Thanksgiving holiday destinations can expect more of the same for the trip home as a coast-to-coast winter storm system brings snow, rain and heavy winds to major travel hubs across the country, weather experts say. Another system is forecast to develop in the mid-Atlantic Sunday, moving into a nor'easter by Monday. In Duluth, Minn., a no-travel advisory was issued for those planning trips to stay in place until at least midday Sunday.
The West Coast isn't being spared from inclement weather: Another storm system hanging off the coast of California is forecast to bring heavy rains in Northern California, especially in the mountains and foothills of San Francisco, Oakland and across the Sierra, Hurley said. This weather will impact travel and could cause slippery conditions.
Sunday, expected to be a historically busy day for USA airlines, will see an anticipated 3.1 million passengers, according to Airlines for America, an airline trade organization.
The storm's exact timing and total snowfall remained uncertain as of Saturday night, but a National Weather Service meteorologist said the storm is expected to reach Portland by late Sunday evening.
High winds and ice are expected to make travel nearly impossible in some places.
Of special concern is the forecast for Sunday, when millions of holiday travelers head home.
Forecasters warn that people traveling throughout the weekend should be aware of the storm's effects. Rain and thunderstorms, some severe, are expected farther south in the Lower Mississippi, Tennessee, and OH valleys.