Skier Lindsey Vonn suffers blow out knee

SCHLADMING, Austria -- Lindsey Vonn landed hard and tumbled face first with a piercing shriek. Just like that, her season was done.

The star American skier was on the snow with two ligaments in her right knee torn, a bone broken in her lower leg.

The cascading fall down the slope during the Super-G at the world championships Tuesday knocked out the four-time World Cup champion for the rest of the season, the latest and most serious in a string of injuries for Vonn at skiing's biggest events.

The U.S. team said in a statement it expects her back for the next World Cup season and the 2014 Sochi Olympics, which start a year from this week.

The harrowing accident came after Vonn went airborne from a jump in the opening race at the championships. As she hit the ground, her right leg gave way and she spun down face first. She ended up on her back as she smashed through a gate.

On the television feed, Vonn was clearly heard screaming an expletive as she landed, then a despairing "Yes, yes," when someone asked, "Are you hurt?"

Race leader and eventual champion Tina Maze watched with her mouth agape.

For 12 minutes, Vonn lay on the snow getting medical treatment before being airlifted by helicopter to a hospital in Schladming.

Vonn tore her anterior cruciate ligament and medial collateral ligament in her right knee, U.S. ski team medical director Kyle Wilkens said in a statement. The broken bone was described as a "lateral tibial plateau fracture."

Christian Kaulfersch, the assistant medical director at the worlds, said Vonn left the Schladming hospital and will have surgery in another hospital. "She first wanted to go back to the team hotel to mentally deal with all what has happened," Kaulfersch said.

Vonn's father, Alan Kildow, spoke with her by phone and said that she's, "mad at the way things turned out." His daughter told him that she landed in a clump of sugar snow, or ice crystals, that caused her fall forward, he said.

"She's a tough character. A very determined and tough character," Kildow told The Associated Press in a phone interview. "She will be back."

Kildow said that surgery could take place as soon as this weekend, likely at the Steadman Clinic, in Vail, Colo. Recovery time varies, according to Dr. Tom Hackett, an orthopedic surgeon at the clinic and the team physician for the U.S. snowboard squad.

"It's not like at six months you say, 'OK, you can get back on a Super-G course," Hackett said. "There's a progression to getting back on skis."