The Warriors went top of the Future Series table after a 7-wickets win against Leinster at North County.
Izzy McLean's 20 was the best of their total of 103 all out. Coleraine's Kia McCartney took four wickets for just 10 runs, while Zara Craig, fresh from helping Phoenix to their inaugural Senior Cup triumph picked up two as the hosts were dismissed for 103.
Kia McCartney
Isabel Light took three wickets in the chase, but Leinster gifted the Warriors 40 bolwing extras to make their task even easier.
The Fox Lodge duo of Lucy Neely (27*) and Hannah McLaughlin (16*) sharing an unbroken stand of 61 to seal the win in just the 13th over.
Lucy Neely
The Warriors can lift the trophy on Thursday as they take on second-placed Knights at Beechgrove.
Cricket Leinster lost to North West Warriors by 7 wickets
Balrothery, North County, 6 August.
Cricket Leinster 103 (23.3 overs; Izzy McLean 20; Kia McCartney 4-10, Zara Craig 2-17)
North West Warriors 106/3 (12.3 overs; Lucy Neely 27*: Isabel Light 3-21)