"The pilots flew the aircraft primarily under visual flight
rules, but encountered instrument meteorological conditions at the
time of the impact. Evidence from the flight path, altitude, air
traffic control communications, and weather reports at the time of
the accident supported the investigating officer's
conclusions."
Source: The US Army, in a prepared release on a
mishap that downed a UH-60 Black Hawk, near Waco, TX, killing all
on board November 29th.