A severe thunderstorm watch has been issued for parts of the Denver metro and eastern Colorado until 9 p.m., according to the National Weather Service in Boulder.

More than 800 flights into and out of the airport have been delayed Tuesday, according to FlightAware. DENVER — Departures to Denver International Airport were grounded Tuesday afternoon due to thunderstorms in the area.

T he FAA issued a ground stop at Denver International Airport on Monday afternoon due to thunderstorms. The ground stop was issued at 1:25 p.m. and will continue until 2:30 p.m. According to the FAA, the probability of an extension for the ground stop is ranked at medium, or 30%-60%.

Soaring temperatures across the Front Range brought the first 100-degree day of the year in Denver and tied the daily record high at Denver International Airport, according to the National Weather

It will be about 7 to 10 degrees cooler on Thursday, with highs in the low 90s. We'll also see a better chance of afternoon storms and a risk of large hail and damaging winds on the eastern plains.

Just before 4 p.m. on Wednesday the National Weather Service monitoring station at Denver International Airport recorded a temperature of 100 degrees.

Monday afternoon is seeing strong to severe thunderstorms east of Denver, and the threat continues through the week. Pinpoint Weather Meteorologist Liz McGiffin looks at where the biggest concerns are.

As of 7:50 p.m. Tuesday, at least 11 flights have been diverted from the Denver International Airport to the Colorado Springs Airport, according to a spokesperson for the Colorado Springs Airport.

BRUSH, Colo — A landspout tornado touched down east of Brush in Morgan County on Colorado's Eastern Plains Sunday afternoon, according to the National Weather Service. The tornado was spotted around 3:48 p.m. between Brush and Akron. It lasted about five minutes, according to the NWS.

Flights trying to leave Denver on Tuesday saw delays ranging from 30 minutes to more than 3 hours, FAA officials said. Incoming flights were delayed between 46 minutes and an hour on average.