Low-hanging fog was blamed for numerous delays in arrivals and departures, and in some cases cancellations of flights at Salt Lake City International Airport Tuesday morning.
The Federal Aviation Administration advised travelers to check with their airlines on the status of their flight until the gray blanket, made worse by a pollution-laden inversion, lessened over the Salt Lake Valley.
Just between 9 a.m. and 10 a.m., airlines reported 27 flights delayed in arriving anywhere from 20 minutes to more than an hour and a half. Four flights were cancelled and three others diverted during the same period.
A smaller number of departing flights were affected, with two cancellations and two delays of up to 30 minutes reported.
"Since 6:30 a.m. the airport has been operating under low visibility. In these conditions, airfield movement slows down, aircraft are escorted by vehicles and runway use is tightly controlled," airport spokeswoman Barbara Gann said.
The visibility woes, along with deicing operations due to the cold weather, hit the airport especially hard during its highest morning activity period. A storm hitting the Northeast also contributed to air travel woes.
Operations were expected to return to normal by noon, after the fog and smog retreated with increasing sunshine.
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