SAN DIEGO -- A radar control outage early today affecting Southern California airports wasn't having a major effect on air traffic at Lindbergh Field in San Diego, an air operations support employee said.

Heidi Connell said the problem between 4:45 and 6:30 a.m. might have been caused by an equipment upgrade at a facility that is responsible for air traffic control at Lindbergh and about 20 other airports, including the Los Angeles International Airport.

"But there are no departures from San Diego until 6:30," she said.

However, the radar glitch did affect incoming flights during that time and that was causing some delays, said Connell.

"There were slight delays in the beginning, but in a few hours it should be just about normal," she said. "It was a ground stop and nothing was flying."

Anyone meeting planes or flying out should check with the airlines to be sure planes are arriving and leaving on time, she said.

The radar interruption came at the start of the three-day Memorial Day weekend, when air travel is very busy.