At 00:30 central time, a Piper PA-28-140 lost power and struck a fence in the ensuing forced landing in a field near Owasso. One passenger suffered minor injuries and the pilot and another passenger were not injured. The flight was cruising on an IFR flight plan when the pilot reported to controllers that the alternator was failing. Soon thereafter the engine lost power. The controller gave the pilot a radar vector to Claremore but the airplane could not reach the airport.