England batter Dunkley made an unbeaten 101 but Sterre Kalis anchored the run-chase for the reigning champions, who got home with two balls to spare
Scarborough: South East Stars 223, Northern Diamonds 178-7 - Northern Diamonds win by three wickets (DLS)
England batter Sophia Dunkley's fifth senior century recovered South East Stars from 55 for 5 batting first but could not prevent the Northern Diamonds from winning an entertaining Rachael Heyhoe Flint Trophy clash at Scarborough.
Diamonds new-ball seamer Jess Woolston claimed all five top order wickets to leave the Stars staring down the barrel inside 11 overs, and her 5 for 37 ultimately set the champions on their way to a third win in five games – by three wickets on DLS.
Classy Dunkley's 101 not out off as many balls fashioned a total of 223 all out in a 46-overs per side game following a wet outfield at 10.30am. Afternoon rain further revised the Diamonds target to 178 off 36, and opener Sterre Kalis finished 66 not out off 98 balls.
Dutch international Kalis held her nerve amidst the loss of three quick wickets, with the Diamonds falling from 146 for 2 to 150 for 5. But later, with four needed off the last over from Bryony Smith, Lizzie Scott hit the winning runs with two balls remaining.
The champions have now won three and lost two of their opening five games. Stars have the same record but are a point better on 15 ahead of the break for the start of the Charlotte Edwards Cup next week.
After Woolston took advantage of extra bounce from the Peasholm Park End, Dunkley was reserved before opening her shoulders late on. Dunkley hit three fours in a 60-ball fifty before reaching 100 off 100 balls, including another four fours and a pulled six.

Sterre Kalis played a crucial hand (Steve Bardens/Getty Images)
After inviting Stars to bat, Woolston had Aylish Cranstone – undone by extra bounce – caught by Leah Dobson running around to short mid-off following a leading edge, leaving the Stars at nine for one in the third over.
Captain Smith and fellow England all-rounder Alice Davidson-Richards both then fell in identical fashion off Woolston, pulling her out to Abi Glen at deep midwicket. The first catch was an excellent effort at head high following a particularly well struck shot.
Sandwiched in between, opener Kira Chathli edged the same bowler behind. The Davidson-Richards wicket was the first of two wickets to fall in the 11th over, with in-form Paige Scholfield caught and bowled by Woolston off a leading edge.
It was 55 for 5, and the 20-year-old from Stockton-on-Tees was enjoying a memorable day in only her sixth senior appearance for the Diamonds.
Kalis then took a superb low catch at backward point to help seamer Glen dismiss Phoebe Franklin for a settling 26, ending a 45-run stand with Dunkley (100 for six after 19 overs).
And hope of a Stars recovery was now pretty much all in Dunkley’s hands. Wickets falling around her forced a more reserved approach.
But after Scott struck twice to remove Tash Farrant and Ryana Macdonald-Gay, leaving the Stars at 154 for 8 in the 31st over, that was when 24-year-old Dunkley decided to change her approach.

Freya Davies supported Sophia Dunkley well (Ben Hoskins/Getty Images)
She pulled Hollie Armitage's leg-spin for six and hit another three boundaries to leg. Early on Diamonds had caught superbly, but Scott and Heath both spilled simple chances with Dunkley on 85 and 100.
Dunkley was given significant support from England teammate Freya Davies, who contributed 15 to a ninth-wicket stand of 68.
Diamonds then showed the value of a good start, with openers Winfield-Hill and Kalis sharing 88. With the threat of rain around, they eased their way ahead of the DLS rate. Winfield-Hill led the way with 45 off 58 balls, including a pulled six off a Davidson-Richards full toss.
Just as the rain started to fall just before 4.15pm, she chopped on to Macdonald-Gay's seam. But Diamonds were ahead of the rate.
Upon the resumption almost half an hour later, their position of strength was threatened despite Bess Heath's aggressive 33.
She was the first of three quick wickets to fall, including Chloe Tryon's runout for a golden duck, as the score fell to 150 for 5 in the 31st over.
The target later became four off the last over at 174 for 6 and Smith bowling. But Scott lofted her over mid-off to secure a four-point haul.
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