The Teessider, whose only European Tour win came at the 2007 French Open, said keeping his European Tour card for next season is his primary objective.
He is 114th in the Race to Dubai and not guaranteed to do so, with two months remaining before the end of the season.
"[Whether I can retain my card has been on my mind] every day... It has been for the last three months. It is a big struggle missing so many cuts," he said.
"It's all about momentum and for two days it has gone my way. The goal for me still is to keep my card, even though I am leading.
"If someone comes through then so be it, I just need my card for next year."
Should he fail, he would have to go back to qualifying school.
Storm began Friday with a two-shot lead over Martin Kaymer, Fabrizio Zanotti and Raphael Jacquelin.
A 66 - another bogey-free round - saw him finish round two three strokes ahead of Gonzalo Fernandez-Castano, Scot Scott Jamieson and Peter Hanson.
"It makes a change to have all red on my card," said Storm, who finished 41st in the Omega European Masters last week.
"Hopefully I used all the bogeys up last week in Crans - and long may it continue.
"I wasn't expecting to shoot four-under. I just managed to go round and keep the bogeys off the card as I did yesterday and made a few birdies."