Ed Carpenter Racing's Ed Jones topped the speed charts in third practice ahead of the Indianapolis 500 as rain called off the session early, preventing McLaren's Fernando Alonso from taking to the track.
Rain halted proceedings at the Brickyard as inclement weather and lightning strikes darkened the Indiana skies, with drivers and teams losing vital practice time ahead of qualifying this weekend.
Jones fronted the top of the leaderboard with the fastest average lap speed of 227.843mph in the #63 Ed Carpenter Racing with Scuderia Corsa entry.
The British-Emirati's speed was also fastest in the no-tow speed charts on a 224.957mph. He was, however, the only Chevrolet-powered driver inside the top five.
2017 Indy 500 winner Takuma Sato was second in the standings with a 226.699mph. Sato has yet to trouble the top of the speed charts through practice but still ran in the 224mph range without a tow.
Andretti Autosport's Zach Veach ended the afternoon third on a 226.070mph in the #26 Gainbridge entry and is currently the fastest driver so far throughout practice from the Andretti team. His best no-tow speed was a 222.998mph.
Four-time IndyCar champion Sebastien Bourdais was fourth as the session came to a close, a 225.996mph was his best effort of the day, the #18 Sealmaster car was low in the no-tow speeds and only good enough to scrape into the 220mph range.
Colton Herta rounded out the top five for Harding Steinbrenner Racing with an average lap speed on 225.458mph. The 19-year old has been getting back up to speed after a spin on Tuesday. A 221.263mph was his best run without a tow.
Elsewhere in the field, Carlin's Patricio O'Ward had a huge shunt in Turn 2 early on in the session. The crash was similar to Ganassi's Felix Rosenqvist on Wednesday. The car got airborne after smashing into the outside barrier.
The Mexican was cleared by the infield medical staff after the crash, but Carlin has yet to confirm if the chassis is still usable for the final practice on Friday, before Saturday's qualifying begins.
Alonso failed to get any track time after the team had to switch to its back-up car which was prepared by Carlin in Florida after Wednesday's heavy crash.
There was a plan to get the Spaniard out for the late afternoon, but the weather halted any attempt to get the #66 back on track, leaving just one day to prepare the car for qualifying.
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