This just in from Notify NYC (but note that, unlike previous weekend closures, this one begins at 7:00 this–Friday–evening and goes to 6:00, not 5:00 a.m. Monday):
Notification issued 11/8/13 at 12:00 PM. Starting at 7:00PM on Friday November 8 until 6 AM Monday November 11, the Brooklyn Bridge will be closed to inbound/westbound traffic. Motorists proceeding inbound/northbound from south Brooklyn via the Belt Parkway and Gowanus Expressway should use 3rd Avenue/Hamilton Avenue into the toll facility Hugh L. Carey (formerly Brooklyn Battery) Tunnel as the best route into lower Manhattan. Motorists proceeding inbound/westbound from Queens/Long Island should consider the Williamsburg Bridge, or the toll facilities at the Robert F Kennedy Bridge or Queens Midtown Tunnel, for best route into Manhattan. Throughout this closure the Manhattan Bridge will accommodate 5 lanes of traffic inbound/westbound and two lanes outbound/eastbound.
The DOT website says the closure starts at midnight; I’m guessing that the notification above reflects more current info.