Two heat waves are arriving this weekend at the XPEL Grand Prix at Road America Presented by AMR.

One is a weather system expected to hike air temperatures into the mid-90s Saturday and Sunday at the iconic Road America circuit in Wisconsin. The other is named Kyle Kirkwood.

SEE: Practice Results

Kirkwood, who has won the last two NTT INDYCAR SERIES races, continued his hot form Friday by leading the first practice with a top lap of 1 minute, 44.9881 seconds in the No. 27 Siemens Honda fielded by Andretti Global. Kirkwood is third in the series standings, two points behind second-place Pato O’Ward and 75 behind leader Alex Palou.

“Good start,” Kirkwood said. “Definitely a session that was hindered a little bit by the red and the timing (of red flag). Happy to be quick once again here. We were quick last year, so I guess that’s a good positive to take away from today, and hopefully that trend continues.

“But the weather is going to be so much different tomorrow that I’m not sure what we learned from today is going to be applicable tomorrow or the next day. We’ll see what happens.”

The air temperature, in the low 80s Friday, is expected to climb at least 10 degrees into the mid-90s Saturday and Sunday. That will reduce the grip of the Firestone Firehawk tires and test the stamina of drivers.

Devlin DeFrancesco, 25th in points, ended up a surprising second at 1:45.1414 in the No. 30 Manitou Group Honda of Rahal Letterman Lanigan Racing.

Team Penske began its rebound from a tough event last Sunday night at World Wide Technology Raceway by placing third and fourth on the 14-turn, 4.014-mile natural-terrain road course. Reigning Road America winner Will Power was third at 1:45.1795 in the No. 12 Verizon Team Penske Chevrolet, while two-time Road America winner Josef Newgarden was fourth at 1:45.2228 in the No. 2 PPG Team Penske Chevrolet.

Christian Lundgaard rounded out the top five at 1:45.2246 in the No. 7 Arrow McLaren Chevrolet. Scott McLaughlin helped Penske’s recovery by clocking in sixth at 1:45.3191 in the No. 3 XPEL Team Penske Chevrolet. McLaughlin, Newgarden and Power finished 24th, 25th and 27th, respectively, last Sunday night on the oval at WWTR.

Championship leader Palou was ninth at 1:45.3664 in the No. 10 SOLO Cup Chip Ganassi Racing Honda. Palou led with seven minutes left in the 75-minute session, but nearly the entire field pitted late for Firestone Firehawk alternate tires, which provide more grip and speed but have less durability.

That shuffled the order considerably until the checkered flag, although a red flag with five minutes left caused by a trip into the Turn 1 gravel by 2019 Road America winner Alexander Rossi in the No. 20 ECR Java House Chevrolet interrupted some late attempts to dash up the speed charts.

Up next is pre-qualifying practice at 11 a.m. ET Saturday, followed by NTT P1 Award qualifying at 2:30 p.m. ET. FS1, the FOX Sports app and the INDYCAR Radio Network will provide live coverage.

The 55-lap race starts at 1:30 p.m. ET Sunday (FOX, FOX Deportes, FOX Sports app, INDYCAR Radio Network).