Thunder scraped an exciting one-wicket win towards The Blaze at Trent Bridge because the hosts slumped to a fourth defeat in 5 within the Rachael Heyhoe Flint Trophy.
Chasing 175 to win, Thunder seemed to be cruising to their goal at 89-0, with Seren Smale hitting a half-century.
However Smale (58) was a part of a collapse which noticed Thunder droop to 128-6 after which 161-9.
It was left to ultimate pair Pheobe Graham and Hannah Jones to steer the guests house in an exciting end.
Thunder selected to bowl first and 18-year-old England fast Mahika Gaur ousted the damaging high order trio of Tammy Beaumont, making her first Blaze look of the season, Teresa Graves and South Africa worldwide Nadine de Klerk to depart the hosts 52-3 within the twelfth over.
It was 74-5 5 overs later earlier than skipper Kirstie Gordon steadied the ship with 43 from 82 balls, her finest knock in 9 years, earlier than falling to Kate Cross.
Quantity 9 Sophie Munro lasted 50 balls for her 19 earlier than being run out because the Blaze recovered from 108-7 to succeed in 174, with Gaur ending with 3-33 and left-arm spinner Jones taking 3-37.
It an easy chase for Thunder as Smale and England opener Emma Lamb placed on 50 within the opening six overs and reached 89-0 within the sixteenth.
Nonetheless, Lamb’s departure for 44 sparked a collapse which noticed six wickets fall for the addition of simply 39 runs and left the sport within the steadiness, with left-arm spinner Gordon accumulating 3-25 and off-spinner Lucy Higham 3-28.
Smale departed, bowled by Gordon, with victory nonetheless 47 runs away and, regardless of Sophie Ecclestone and Cross getting the chase again on observe, Ecclestone and Gaur fell to Gordon in consecutive deliveries to depart the guests on 146-8.
Cross stood agency for 15 and was the ninth wicket to fall with 14 runs wanted but additionally with the spinners having used up their allotted overs.
Nonetheless, Graham and Jones resolutely rotated the strike and hauled Thunder to the road with greater than 5 overs to spare to go fifth and go away Blaze rooted to the foot of the desk.