The weather conditions at the time of the crash last Sunday are just one of the factors the National Transportation Safety Board is looking into as part of their investigation into the cause of the incident.
Multiple calls into the Los Angeles County Fire Department dispatch center confirmed just how bad visibility was at the time of the crash.
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"I'm walking in the trail I could hear the plane, I think it was, in the clouds, but couldn't see it. Then we just heard a 'boom' and a dead sound and then I could see the flames," one caller said.
Another caller told dispatchers that the helicopter crashed into a mountain and was looking at the flames following the impact. Others could only hear the aircraft, but not see it.
"It went over my head. It's thick in clouds. And then I heard a pop and it immediately stopped," another person told authorities. "If this guys doesn't have night vision, I mean, he was, he's completely IFR."
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