While the official report on the reason will probably not come out for a while, there is some speculation that it was due to convective activity (thunderstorms)

While the official report on the reason will probably not come out for a while, there is some speculation that it was due to convective activity (thunderstorms) in the region. Someone on the Cirrus pilots forum looked up the weather at the time of the incident, and it looked like there was some decently heavy precipitation along the approach path.