More than 650 flights in and out of Denver International Airport were delayed as of 3 p.m. Friday afternoon due to thunderstorms, as much of the eastern part of Colorado was placed under a Tornado Watch.

Of the 650-plus delays, 44% were Southwest Airlines flights, 29% were SkyWest flights and 16% were United Flights, according to the website FlightAware.com .

Flights arriving into DIA have been delayed an average of 1 hour and 26 minutes, according to the Federal Aviation Administration.

Despite the high number of delays, only 21 flights in or out of DIA had been fully cancelled as of 3 p.m., according to FlightAware.

Much of eastern Colorado was placed under a Tornado Watch effective until 9 p.m. Friday night, according to a post from the National Weather Service on social media

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