http://apnews.excite.com/article/200...D8051KK80.html

The airline president says the weather probably had nothing to do with it.
He feels the Caravan can handle any kind of weather.

Other pilots report that it was 20 degrees and freezing drizzle at the time
with low ceilings.

If equipped with de-icing boots the Caravan is certified for known ice, but
Cessna says that the plane should not be flown for more than a few minutes
in icing conditions even so.