The winter storm, located over the central U.S. at that time, brought with it heavy snow to the northern Plains and Midwest, Brink said.
Heavy snowfall was recorded across the eastern and midwest United States on December 1.
But much of the Harrisburg region was receiving only rain, with the heaviest rain expected to fall around 11 a.m., according to National Weather Service meteorologist Mike Dangelo. A number of travel advisories have been issued. The warning is in effect from 6 a.m. on Monday, Dec. 2 to 4 a.m. on Tuesday, Dec. 3.
Of special concern is Sunday, which is expected to be the busiest travel day ever for the USA airline industry, with an anticipated 3.1 million passengers, according to Airlines for America, an airline trade organization.
He also deployed state agency commissioners from DHSES, DOT, Thruway Authority and State Police to regions expected to be hardest hit by the storm, and announced the state emergency response bunker will be open until the end of the storm.
About 400 flights were cancelled on Saturday.
Sunday will be especially disruptive as millions of holiday travelers are expected to head home.
Travel interruptions were minimal at Midwestern hubs Saturday morning, with average delays under 15 minutes and only 18 out of over 3,000 flights canceled in the last 24 hours at Chicago O'Hare International Airport, according to the Chicago Department of Aviation.
Another system was forecast to develop in the mid-Atlantic Sunday, moving into a nor'easter by Monday.
Dozens of auto crashes and hundreds of vehicle spinouts occurred Friday night and Saturday morning in the metro area as sleet, snow, rain and wind hit the region.
High winds and ice were making travel nearly impossible in some other places, however.
Duluth said its city staff would monitor Canal Park and other areas for potential flooding and close roadways if necessary.
Back-to-back snowstorms and strong winds combined to seriously complicate travel by land across much of the rest of Wyoming, where roads were closed in the eastern and southern parts of the state because of whiteout conditions. He says deputies have been dealing with accidents and vehicles going off the road by drivers going too fast for conditions.
Travel was also hard in Colorado Saturday as winds blew around snow that fell in previous days. Widespread freezing rain is expected during the first round of the storm Sunday morning through the evening.