After two impressive semi-final wins at home, Norrköping had the chance to advance to the Swedish Championship final on Friday night.
But the fateful match was forced to be postponed until 20.30, when the referees could not implement their original itinerary due to the weather.
The home team Östersund stood with their backs to the wall and were whipped to win to keep the season alive.
Jämtlanders also started strongest and the first period ended 26-22.
But Östersund were not happy there but continued to press and could go to halftime break with a 14-point lead (52-38).
Team captain Popkey stepped forward when it came to
The third period became more even where the home team won 16-15.
When Hesa Fredrik sounded, the Jämtlanders won with the elimination figures 90-65 and Östersund keeps the match series alive.
Norrköping star Taylor Murray, who was allowed to do exactly what she wanted during Tuesday's match in Norrköping, was completely removed by the home team's defense.
But Östersund's big profile and team captain Elena Popkey, who puts the basketball shoes on the shelf, made an important contribution and scored a full 21 points for her Östersund.
Now the team has the chance to level the match series on Sunday when they play at home again, to force a fifth and decisive match.