Air traffic controller shortages are piling up as the government shutdown drags on, with delays and disruptions being reported at airports across the United States.

The Federal Aviation Administration had issued staffing triggers, which signify an air traffic control center is understaffed, for an unusually long list of centers as of Friday evening.

At least 11 airports that experienced delays on Friday evening cited staffing as an issue, according to FAA advisories.

Airports experiencing delays included all three major New York airports — Newark, John F. Kennedy, and LaGuardia — which were also dealing with weather concerns.

"JFK, Newark, and LaGuardia are all under FAA traffic restrictions this evening because of high winds and reduced staffing in multiple air traffic control centers," the New York City Emergency Management Department said, adding, "More restrictions are possible if conditions worsen. Travelers should expect widespread ripple delays and check with their airline for the latest flight status."

Other airports that experienced staffing-related delays on Friday included Nashville International, Phoenix Sky Harbor, and George Bush Intercontinental in Houston.

Since the government shutdown on October 1, airports around the country have reported delays and disruptions related to a shortage of air traffic controllers.

The National Air Traffic Controllers Association previously said the issue highlighted the importance of addressing the existing air traffic controller shortage.

The FAA and Department of Transportation did not immediately respond to a request for comment from Business Insider.