More than 600 flights were delayed at Denver International Airport on Friday as a severe thunderstorm brought wind gusts up to 60 mph across the region.

There were 609 flights delayed as of 8 p.m., according to the flight tracking website FlightAware, most of which were on Southwest and United Airlines.

Arriving flights are delayed up to 30 minutes because of the wind, according to the Federal Aviation Administration.

The National Weather Service issued a severe thunderstorm for the airport and parts of Adams and Arapahoe counties, with wind gusts up to 60 mph and pea-sized hail possible until 8:30 p.m.

This is a developing story and may be updated.

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