A 4-0 win over crisis-hit Dunfermline on Saturday moved the Jags to within two points of Irn-Bru First Division leaders Morton who face Hamilton Accies tonight.
It was only the third time Thistle have tasted success on the road this season after previously winning at East End Park and at Livingston in September.
Steven Craig inspired Alan Archibald's side to a comfortable win with a first-half hat-trick and Erskine was delighted to see his forward partner in the goals.
The talismanic striker said: "A lot of people have been criticising our away performances so we were fired up for Saturday.
"It was a great win for us. We spoke about it before the game and Archie was saying that we hadn't won away from home in the league since September.
"He wanted us to go and change that on Saturday and we did that. I thought our first half performance was outstanding.
"The second half wasn't as good, but the game was won.
"Morton didn't play on Saturday so it was like a game in hand for us. The most important thing was the three points. Hopefully now we can go and get back to the top of the league soon.
"I was surprised when Stef told us that it was his first hat-trick. We were asking him if he had ever scored one in the first half and he said it was the first one in his career.
"It was surprising when you consider how good a player he is but he was delighted to finally get it on Saturday.
"He does a lot of work for the team and he leads the line really well. He bullies defenders sometimes. The two Dunfermline centre-backs are big lads but Stef handled them really well.
"The boys were having a go at him saying they were the easiest goals he will ever get, they were from a total of about six yards!
"It was great to see him get the goals he deserves."
While it was an afternoon to remember for Thistle, it proved to be the latest day of woe for the beleagured Pars squad as off-field troubles at East End Park continue to escalate.
Players only received a fraction of their wages last week and Erskine has sympathy for his fellow pros.
He said: "It is a shame for the Dunfermline players. It is a shambles what is happening.
"To not be paying the players and the staff there is terrible. All the boys feel for them.
"It is a shame, you don't want anything like that to happen and we know that if we were in the same position it would be hard to get out on the park and play.
"It is a credit to the Dunfermline players that they played. Even though we beat them 4-0, they never gave up and the fans stuck behind them. Hopefully they get things sorted soon."