MAMMOTH LAKES, Calif. (AP) -- Now that the wreckage of Steve Fossett's plane has been found, investigators are looking into what caused the crash. And they're trying to find out if weather played a role.

Skies were clear when Fossett took off from a ranch in Nevada 13 months ago. But later that day, large storm clouds were reported over the peaks around Mammoth Lakes, California.

That's where the wreckage was found this week. The plane had crashed into a mountain, with such force that authorities say Fossett must have died instantly.

Investigators have been working today to recover additional evidence from the crash site and fly it to a hangar for examination. And once again, weather may be a factor -- a storm is expected to move in and dump two feet of snow.

Search teams had flown over the crash site 19 times during the initial search last year. But it hadn't been considered a likely place to find the plane. And search coordinators say the gusty conditions hampered the search effort, as did the small amount of debris that remained after the plane crashed.

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