Kilmarnock twice came from behind to snatch maximum points in a match that could have gone either way.
But despite the five goals on offer this was a far from classic encounter.
Killie's game-plan was upset before the game had even begun when McGowne injured himself in the pre-match warm up, with Sean Hessey stepping in to replace him.
The visitors struck first, shocking the home side with a seventh-minute opener, when John Spencer's corner from the left was headed into the net by Stuart Elliot.
At that stage the visitors looked like they could go on and add to their tally as they swung forward.
Spencer should have added to their lead after 13 minutes but he shot straight at Gordon Marshall from 10 yards.
Killie gradually got a foot-hold on the game with young striker Craig Dargo making his presence felt in the visitors defence.
In the 20th minute he was booked for a foul on Martyn Corrigan but six minutes later he netted his first goal for the Ayrshire side.
His pace took him beyond the Well defence and he stuck out a foot to divert the ball away from Andy Goram.
Kelly went on to enjoy a good spell after that and Peter Canero was unlucky to see his shot deflect off Derek Townsley for a corner.
Dargo had an early second-half chance for the home side but he was off-balance as he hit his shot, sending the ball wide of the goal.
After 54 minutes Don Goodman should have scored his side's second when he was released by Spencer but Marshall denied him with a good save.
But it was an error by Marshall in the 65th minute that led to Motherwell taking the lead once again.
The keeper was slow to react to a Spencer free kick and Elliot pounced to score his and Motherwell's second goal.
Killie got back on level terms when substitute Paul Wright scored from the penalty spot after he had been fouled in the box.
Then with the Well defence under increasing pressure Freddie Dindeleux raced into the box to meet an Andy McLaren corner and fire a header past Goram for the match winner.