Denver International Airport (DEN) and the affected airlines are still accessing the damage caused by a severe thunderstorm. According to Channel 7, a severe thunderstorm with large hail, lightning and torrential rain on Wednesday night (July 13) damaged dozens of cars and at least 40 airplanes, leaving more than 1,000 travelers stranded because of flight cancellations.

The storm produced 3/4-inch hail which fell for about 15 minutes.

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