here is what I do know from the comfort of my living room:
I don't have the approach plates infront of me and my PDF reader is not working but the weather did suck. If it was not at or below mins, it had to be damn close..................[edit]found the approach plates[edit] here are the mins for Cat A/B aircraft:
Gps rw14 1380-1 410(500-1)
Gps rw32 1360-1 400(405-1)
Loc rw32 1280-1 325(400-1)
Ndb rw32 1400-1 445(500-1)
Vor/Dme GPS 1420-1 450(500-1)
The field elev is 970 and if the sky's were as reported ovc002, that would be 1170 if my addition works. 1170 is 100 ft below the lowest min listed for the airport.
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KCCO 042359Z AUTO 07004KT 1 1/4SM OVC002 02/02 A3012 RMK AO1
KCCO 042339Z AUTO 08003KT 1 1/4SM OVC002 02/02 A3012 RMK AO1
KCCO 042320Z AUTO 09004KT 1 1/4SM OVC002 02/02 A3012 RMK AO1
KCCO 042259Z AUTO 10004KT 1 1/4SM OVC002 02/02 A3013 RMK AO1
KCCO 042239Z AUTO 07004KT 1 1/2SM OVC002 02/02 A3012 RMK AO1
KCCO 042219Z AUTO 08004KT 3/4SM OVC002 02/02 A3012 RMK AO1
KCCO 042159Z AUTO 07004KT 3/4SM OVC002 02/02 A3013 RMK AO1
KCCO 042139Z AUTO 08004KT 3/4SM OVC002 02/02 A3012 RMK AO1
KCCO 042119Z AUTO 07003KT 3/4SM OVC002 02/02 A3013 RMK AO1
KCCO 042059Z AUTO 06004KT 3/4SM OVC002 02/02 A3012 RMK AO1
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My thoughts go out to the families, but I just wanted to clarify what the wx was. If the wx was as stated I would question why it happened. The only way I or anyone else will learn is to ask questions, speculate, whatever one wishes to call it.