WESTERN Storm are discovering their very best form in the Kia Super League at exactly the right time.

So says head coach Trevor Griffin, who insists confidence is sky high following restorative back-to-back wins in the women's domestic T20 competition.

Soundly beaten by defending champions Southern Vipers in their opening game at the Ageas Bowl, last season's runners-up announced themselves with a whimper earlier this month. But the players have since responded to that chastening experience in fine style, defeating Loughborough Lightning and Yorkshire Diamonds to put their quest to make finals day in Hove on September 1 back on track.

"It's all about how you finish, not how you start," argued Griffin. "If you're going to have a really poor performance in this competition, then it's probably best to get it out of the way right at the beginning.

"We simply didn't turn up in that first match against the Vipers and there was some real soul searching among the players after that one. We knew the only way was up from there-on in."

Required to beat Lightning on home soil at Taunton, Storm mustered a much-improved display to register a five-wicket triumph and restore lost confidence. If they made hard work of chasing a modest 108 at the Cooper Associates Ground, they nevertheless demonstrated resilience and character aplenty to prevail.

Griffin's charges then headed to York for Sunday's showdown with Diamonds in the knowledge that victory would put them in a strong position to qualify for the finals. If they stuttered at times against Lightning, Storm moved up a gear to register a near-perfect 10-wicket success in the north.

"We've talked about improving with every game and peaking towards the end of the month and Sunday's performance was definitely a step up," added Griffin. "Because this is a short tournament, momentum is important. We are improving with every game we play and building momentum."

Rachel Priest scored a brilliant unbeaten hundred, staging a record stand for Super League with captain Heather Knight, as Storm successfully chased down 160 to move into third place in the group. It was an outcome that will fill the players with confidence ahead of crucial group stage encounters against Surrey Stars and Lancashire Thunder this week.

Griffin commented: "The manner in which we went about our business and executed our game-plan against Yorkshire will help instill belief. Surrey Stars are up next and they are a very strong side this year. We know we will have to up our game again, but the players are capable of doing that.

"But the players will go into that game full of confidence, believing they can keep the winning run going. We have two games left and we have to win both if we want to be sure of being there at finals day. That was our aim before the competition started and, after winning the last two games, our fate is in our own hands."

Storm all-rounder Stefanie Taylor sustained a finger injury in the win at York and will undergo a fitness test prior to Wednesday's fixture against Surrey Stars at Guildford. Storm complete their group games when they host Lancashire Thunder at the Brightside County Ground in Bristol on Saturday (2.30).