Glamorgan recalled seamers James Harris and Andy Gorvin while Worcestershire brought in batters Dan Lategan and Jones, and paceman Ben Allison.
Eddie Byrom rode his luck to get Glamorgan off to a flyer with 41 off 37 balls including eight boundaries over a parched outfield, before skying a pull off Allison (2-49), eventually taken by wicket-keeper Henry Cullen.
Tribe and Hurle started quietly but Hurle, in only his third first-team innings, took 14 off Ethan Brookes’s first over, then soaked up some pressure before smashing a pair of sixes off Khurram Shahzad.
His intelligent innings, including six fours and three sixes, was ended by the introduction of spin from Brett D’Oliveira (2-46), after a stand of 104 in 19.1 overs with Tribe.
Kiran Carlson, Will Smale and Billy Root fell in quick succession before Tribe moved calmly on to reach his century off 114 balls.
Matthew Waite ended with fine figures of 1-23 in his 10 overs, but Dan Douthwaite blasted four sixes in an entertaining cameo of 37 off 26 balls.
Although Tom Taylor claimed two late wickets, Tribe batted through in the sunshine, finishing with 12 fours and a six to beat his previous List A best of 115 not out for Jersey.
Harris bowled Brett D’Oliveira third, ball but a stand of 78 between academy teenager Lategan and Kashif Ali got them going, before Kashif (22) was brilliantly caught by Carlson off Romano Franco and Lategan’s hard-hitting knock of 46 was sawn off four balls later in a run-out mix-up.
That brought Libby and Jones together with plenty of time to rebuild and get the measure of a pitch with inconsistent bounce, and they displayed a sensible mixture of caution mixed with the occasional big shot.
Jones showed no signs of his difficult season as he led the way, taking more of the strike as the pair laid into Glamorgan’s toiling attack.
Libby was put down off a difficult chance to deep cover off Harris on 47 and could have been caught at long-off off Gorvin on 62, then hit Carlson for four despite losing his grip on the bat during the shot.
Libby was eventually well held by Gorvin off his own bowling, but it was too late to save Glamorgan despite a second wicket for Harris, Ethan Brookes hitting 13 off seven balls.
Jones continued to hit the ball to unorthodox parts of the field as Glamorgan were left chasing shadows and a straight drive off Gorvin sealed the win with 10 balls to spare.
Worcestershire have four wins and a tie from six outings with their fate in their own hands.
