ADOT is cautioning motorists of a rockfall on State Route Alternate 89, along a 14 mile stretch between Sedona (about a mile north, at milepost 375) and Flagstaff (about 9 miles south, at milepost 389).
The event occurred Wednesday evening Jan 20, and is not expected to be cleared until the end of Tuesday, Jan. 26.
Update (1-25-10 3 pm): I've learned that the warning was only a caution for the potential of rockfalls through tomorrow, not an actual rockfall. I apologize for the misunderstanding.