Craig Young was the last gasp hero for the Warriors as they edged out defending champions Leinster Lightning to go top of the T20 interpro table with their second win of the weekend.
Chasing an imposing 183, the North West were given a rapid start by William Porterfield who played some incredible shots on his way to the fastest fifty of the season - 21 balls.
He cleared the ropes five times in a vintage display reminiscent of his golden years, and following on from his midweek century means he may not be getting his P45 from Ireland just yet.
Six hit by William Porterfield: Pic Rodney Smythe
The Warriors pursuit stalled though and they looked beaten as the required rate went to double figures as wickets fell.
They needed 32 from the last three overs with eight wickets down but thanks to Graham Hume (19) and Craig Young they kept in the game, finding the boundaries when needed.
With three needed off three balls, there was a dramatic twist as Hume was brilliantly ran out by a direct hit from long on by Josh Little coming back for a second that would have tied the game.
Two needed from two and Craig Young held the nerves to get the second, beating the throw from long off by George Dockrell who had fumbled - he wasn't the first or the last to do so on the dry, bumpy outfield which made it difficult for all the fielders.
Young's despairing dive just beat Tucker's desperate lunge for the stumps, and after a moment to check he had indeed made it, 'Big Red' let out a roar of joy.
Dive by Craig Young just beats Lorcan Tucker's lunge: Pic Rodney Smythe
Young claimed the Man of the Match by virtue of another three wickets in Leinster's innings.
A word of praise too for Ross Allen - who took three wickets and slowed the Lightning onslaught.
After a shaky start - Andy Balbirnie aside (24 with five fours) - George Dockrell (44) and Lorcan Tucker looked to be taking the hosts towards 200 as they added 79 in eight overs.
Tucker hit four sixes in a rapid 51 before becoming one of Allen's victims.
The champagne moment of the innings though was a stunning piece of intelligent athleticism by Kyle Magee on the long off boundary. Barry McCarthy was brilliantly caught after the Brigade teenager threw the ball up as he went over the rope, and getting back into play to complete the catch - how crucial that proved in the final analysis.
Warriors top the table then going into the second Festival weekend which starts at Bready next Friday at 11am.