American skier Lindsey Vonn was airlifted off the slopes at the Alpine Skiing World Championships in Austria on Tuesday after crashing in the women's super-G and reportedly injuring her right knee, according to a report from Reuters (h/t NBC Sports):

Vonn had tumbled on the piste halfway down in a race which started three-and-a-half hours behind schedule given the poor visibility.

Vonn hurt her right knee as she nearly somersaulted on the snow and was heard screaming in pain on the side of the course.

UPDATE: Tuesday, Feb. 5, at 11:48 a.m ET by Brandon Galvin

Yahoo! Sports' Charles Robinson has the latest on Lindsey Vonn's injury status.

A source told Yahoo! Sports that Olympic gold medalist Lindsey Vonn has suffered ACL & MCL tears to her right knee in a mountain crash today

— Charles Robinson (@CharlesRobinson) February 5, 2013

---End of update---

According to CNN Breaking News (via Twitter), the hospital that Vonn was taken to is saying that she suffered a "complex knee injury."

Ski champion Lindsey #Vonn has "complex knee injury," hospital says. on.cnn.com/WrUKo8

— CNN Breaking News (@cnnbrk) February 5, 2013

Alex Goldberger of NBC Olympics reported (via Twitter) that the doctor's diagnosis on Vonn is a significant knee injury. 

Vonn update - FIS official: Dr reported a “cruciate and lateral ligament” injury – not tibia, as rumored earlier. But no further details

— alex goldberger (@alexgoldberger) February 5, 2013

The 2014 Winter Olympics are just over a year away, so this could have serious ramifications on Vonn's ability to compete. 

Video has surfaced of Vonn's crash (courtesy of hennesey10068) and the medical staff tending to her (h/t Simona Giannotti):

Vonn wrote a special report for the Denver Post before the start of the event, saying that weather was a factor and it could lead to the race being postponed. She said that because of the inclement weather, it was impossible to train on the hill Monday.

According to a report from the BBC, Vonn's crash occurred around 9:15 a.m. ET, and medics were attending to her on the slope. 

Vonn’s crash comes right on the heels of the accident at the Winter X Games that cost Caleb Moore his life. Moore was attempting a backflip with his snowmobile, but he couldn’t get the snowmobile into proper landing position, and it flipped on top of him.

Vonn is one of the most popular and decorated American skiers in history. She has won 59 World Cup races throughout her career, including at least one each in downhill, super-G, giant slalom and super.

At the 2010 Winter Olympics, Vonn became the first American woman to win a gold medal in the downhill competition.