The takeoff was being conducted on runway 26 with local winds from 230 degrees at 13 knots, gusting to 20 knots. The pilot reported the airplane veered off the left side of the runway during the takeoff roll, just prior to liftoff. He stated he reduced the throttle at which time he saw a taxiway sign in front of him so he advanced the throttle. He stated that the airplane cleared this sign, but contacted another sign. He stated he pulled the power back and the main landing gear caught in the snow spinning the airplane around.