Lowes is sixth in the standings - the final Showdown spot - ahead of Ian Lowry, Noriyuki Haga, James Westmoreland, Chris Walker and Alastair Seeley.
With Sunday's two races deciding who the six riders to fight for the title will be - ahead of the equalisation process to give them all a chance of glory in the final three meetings of the year - Westmoreland performed the best of those hopefuls outside the top six despite a crash at Goddards in Q1 which left his WFR Honda team struggling to repair the damage ahead of Q2.
He was fifth while Walker was down in 11th ahead of Haga (12th), Lowry (14th) and Seeley (17th).
Fifth-placed Tommy Bridewell, who is not yet assured of his spot, was sixth.
Brookes, who took his third pole of the season, is second in the standings. Leader and reigning champion Tommy Hill was third with third-placed Shane Byrne absent through injury and fourth-placed Michael Laverty 10th after a disastrous crash at Redgate at the start of Q3. He was unhurt.
The trio will be in the Showdown come what may, but are still keen to secure the all-important podium credits which will give them the edge in the title race.
"This pole position feels very sweet and it is good for us to be building these kind of results ahead of the Showdown," said Australian Brookes.
1. Josh Brookes (Tyco Suzuki) 1:30.085
2. Alex Lowes (WFR Honda) +0.116s
3. Tommy Hill (Swan Yamaha) +0.274s
4. Jon Kirkham (Samsung Honda) +0.472s
5. James Westmoreland (WFR Honda) +0.503s
6. Tommy Bridewell (Supersonic BMW) +0.705s
7. Michael Rutter (MSS Bathams Kawasaki) +0.812s
8. Luca Scassa (Padgetts Honda) +1.066s
9. Patric Muff (Supersonic BMW) +1.956s
10. Michael Laverty (Samsung Honda)
- James Westmoreland
- Noriyuki Haga
- Ian Lowry