The chances of rain clearing out of the Cape Canaveral area before today’s launch window closes are not encouraging, Clay Finn, launch weather officer of the Air Force’s 45th Weather Squadron, told the launch team during a briefing that just concluded. The Atlas booster stage and Centaur upper stage are fully fueled. The countdown is proceeding towards a 5:55 p.m. EST liftoff and the launch window runs until 6:25 p.m.