Flight cancellations at Pittsburgh International Airport surpass 100

Pittsburgh International Airport has canceled more than 100 flights on Sunday, as a historic winter storm hits western Pennsylvania. 

The airport has 102 cancellations and eight delays as of Sunday evening, according to the flight-tracking site FlightAware. For Monday, there are already 25 cancellations. Travelers should contact their airline for updated flight information.

"Our crews have been on the airfield all night keeping runways clear, and we'll continue this work throughout the day as flights continue to depart and arrive," the airport said in a tweet.

Airlines across the nation have canceled more than 10,000 U.S. flights for Sunday, according to FlightAware. That's the most for a single day since the start of the COVID-19 pandemic.

Sunday's winter storm could drop 10 to 16 inches of snow on the Pittsburgh region, and state agencies put travel restrictions on many of the major roads across Pennsylvania. 

Pittsburgh Regional Transit suspends service

Pittsburgh Regional Transit said, as of 5:17 p.m. on Sunday, it is suspending service due to "deteriorating conditions." 

In a news release, Pittsburgh Regional Transit said all bus and rail service has been suspended immediately. Before the suspension, all service was experiencing delays of up to 60 minutes due to road conditions. Normal operations are scheduled to resume on Monday morning. 

"Our operators deserve to be commended for doing their best under very challenging conditions, but the situation has deteriorated to the point where continuing service could put both our operators and riders at risk," PRT CEO Katharine Kelleman said in the news release. "With several buses already stuck in the snow, we must err on the side of caution and safety."

ACCESS paratransit trips are canceled on Monday, PRT said.