Flight delays, severe thunderstorm warnings in effect as thunderstorms pelt Front Range

1:38 p.m.: A tornado warning in effect until 2 p.m. has been issued for Wigwam south of Colorado Springs. According to a tweet from NWS Pueblo, radar indicates a tornado has formed and quarter-sized hail also is possible.

Tornado Warning continues for Wigwam CO until 2:00 PM MDT pic.twitter.com/kHatUZl3oN

— NWS Pueblo (@NWSPueblo) June 12, 2023

More than 500 flights have been delayed at Denver International Airport on Monday due to thunderstorms across the Front Range.

Twenty-seven flights have already been canceled, according to FlightAware. Southwest has accounted for one-third of the 550 delayed flights.

The storm system prompted the National Weather Service in Boulder to issue a severe thunderstorm warning and flood advisory for Boulder County. That area can expect quarter-size hail, wind gusts up to 60 miles per hour and likely street flooding in south Boulder.

Boulder’s mayor, Aaron Brockett, tweeted video of  a central Boulder street covered in hail, with water flowing freely down the road.

“Stay safe out there folks,” he said.

Serious hail and street flooding in central Boulder. Stay safe out there folks. pic.twitter.com/M0F3kb6Lce

— Aaron Brockett (@AaronBrockett12) June 12, 2023

NWS Pueblo issued a severe thunderstorm warning for parts of El Paso County, including Colorado Springs and Fountain, where large hail and gusty winds are also possible.