Wade Ormsby fired a 5-under 67 on Friday to grab a share of the lead at the Ballantine's Championship before play was suspended for the second straight day due to darkness.
The first round was finished earlier Friday after Thursday's round was delayed because of rain and poor visibility due to fog, and later suspended for darkness.
Friday's second round was then delayed for over an hour due to the threat of thunder and lightning, causing play to eventually be called off again as night fell upon Blackstone Golf Course.
Arnond Vongvanij carded a 3-under 69 to join Ormsby in first place at 7-under- par 137.
"I'm just happy with the way I played and wherever the score stands, I'll still stick to my game plan tomorrow and go from there," Vongvanij said.
James Morrison (66), Alexander Noren (67) and Jbe Kruger (67) shared third place at 6-under, while Tommy Fleetwood (71) is in the clubhouse in sixth at minus-5.
Stephen Gallacher is alongside Fleetwood at 5-under through 12 holes and will finish his second round on Saturday prior to the start of the third round.
Ormsby started on the back nine and opened with a birdie at the 10th before picking up another shot with a birdie at the 12th.
After adding a couple more birdies at the 15th and 18th to hit the turn at 6- under for the tournament, he stumbled to his lone bogey of the day at the second.
But the Australian later closed with a pair of birdies at the seventh and ninth to head to the top of the leaderboard.
"My game's in pretty good shape, I had the last two weeks at home practicing so it was nice to come out here and keep the form going," said Ormsby.
Vongvanij also started on the back nine and parred his first five holes before rolling in a birdie at the 15th.
Two more birdies at 18th and second moved him into a share of the lead with Ormsby until he tripped to his first bogey of the tournament at the fourth.
Vongvanij, however, quickly got that stroke back with a birdie at the fifth and closed with four straight pars to remain at 7-under.
NOTES: Ormsby is playing the tournament as a member of the co-sanctioning Asian Tour ... Defending champion Bernd Wiesberger was 2-under for the tournament through 13 holes of his second round before the suspension ... Ormsby and Vongvanij are both seeking their first win on the European Tour.