Heather Knight scored a century for Somerset as they closed the gap on One-Day Cup group leaders Surrey with a 136-run thrashing in Taunton.
The former England captain hit 103 as Somerset posted an imposing 337-9 in their 50 overs which proved too much.
Elsewhere, Australian Jess Jonassen stared with bath and ball as Yorkshire beat Roses rivals Lancashire, while there were also wins for Hampshire and The Blaze.
Knight top scored with 103 off 107 balls, which included nine fours and two maximums, and with help from captain Sophie Luff (57) and Danielle Gibson (77 off 37 balls), Somerset put on 337-9 off 50 overs in a run-fest in the south west.
Maitlan Brown picked up 4-57 for Surrey who were set a daunting chase, and when Bryony Smith was bowled for a duck third ball, the visitors were already in trouble.
A third-wicket partnership of 76 between Alice Capsey (59) and Alice Davidson-Richards (48) gave Surrey hope - but once the latter was dismissed by Lola Harris (3-44), the visitors' chances of claiming an unlikely win looked gone.
Charlie Dean claimed the final wicket of Tilly Corteen-Coleman, her third of the innings, as Surrey were bowled all out for 201.
A brilliant all-round performance by Jess Jonassen, who made her first century in professional cricket and followed that with four wickets, led Yorkshire to a second win in four games by 83 runs at Emirates Old Trafford, with defending champions Lancashire now having lost three from four.
Jonassen's fine 108 underpinned the Yorkshire innings with the visitors making 241 all out after being asked to bat.
Jonassen and Sterre Kalis (46) rebuilt with 109 for the third wicket after Kate Cross had struck two early blows, and Cross (4-38) enjoyed further success as Yorkshire lost their last six wickets for 45.
After Rachel Slater struck in the opening over to dismiss Eve Jones, a 61-run partnership between Darcey Carter and Seren Smale looked to be the foundation for Lancashire to build on.
Jonassen (4-30) had other ideas, dramatically swinging the game Yorkshire's way with three wickets in three overs to reduce Lancashire to 74-4 in the 19th over.
That proved to be decisive as the hosts failed to recover, ending well short on 158 all out.
Lauren Bell's first competitive bowl of the season resulted in her first domestic List A five-wicket haul as Hampshire hammered Durham.
Fast-bowler Bell has been protected ahead of England's busy international summer, which sees New Zealand and India visit, either side of a home T20 World Cup.
Her 5-22, a personal best, was full of pace and control as she routed Durham out for 118.
Fellow England international Maia Bouchier made sure of a bonus point victory with a hasty 47 as Hampshire secured their victory by six wickets with more than 25 overs to spare.
This was Bell's first 50-over outing since England's World Cup semi-final defeat by South Africa, and her first competitive spell since winning the WPL final with Royal Challengers Bangalore.
Her first four-over spell hinted at easing back into things as she went for 18 and looked slightly down on pace.
But when she returned, the speed increased, the ball zipped through and the wickets flowed. Her second spell of 4.1 overs returned a magnificent 5-4 to give notice to England's World Cup rivals.