Have your say on this match and they were stunned when Ospreys seized the initiative courtesy of two Connor penalties in quick succession midway through the half.
Warriors skipper Ally Kellock was forced off with a knee problem shortly after the interval.
Parks then levelled the match with another 45-metre potshot at goal.
Even better was to come from Parks as he drilled home his third penalty - making light of the treacherous conditions.
Ospreys piled on the pressure in the dying seconds, but the Warriors held on for victory.