This just in from Notify NYC:
Notification issued 11/22/13 at 12:48 PM. Due to ongoing long-term construction, the Manhattan-bound/westbound Brooklyn Bridge will be closed from 9:00 PM on Saturday, November 23rd until 6:00 AM on Monday, November 25th. Brooklyn-bound traffic will be maintained throughout the project, as well as the span’s pedestrian and cycling paths.
There’s more information here.