The thunderstorm that crashed across Canberra and Queanbeyan on Thursday morning stopped play in its tracks for two hours, forcing the overnight leader's group to wait until after 3pm to tee off.

Deyen Lawson shot a course-record 61 in his opening round and cruised to a four-shot victory at 15-under par.

Canberra's Josh Armstrong flew out of the blocks to birdie the first four holes of his final round, before finishing fourth at nine-under.

Federal teaching professional Andrew Welsford finished at seven-under, while fellow Canberran Matt Millar shot two rounds of 68 to finish at four-under.

Millar will head to Moruya for the South Coast Open, which starts on Sunday, and his season will likely wrap up at the NSW Open in a month.

It's unlikely he'll go to Japan this year with current restrictions meaning he would have to spend two weeks in quarantine over there and then another two weeks when he gets back to Australia.

All that for the chance to play just two or three tournaments.

"I can't really see myself going to Japan, to be honest, not with what they've announced," Millar said.

"At this point in time you still can't get in there as a foreigner and then there's a double quarantine really.

"You've got to double quarantine going there for a couple of weeks and then when you come home.

"I'm looking at it thinking, 'I don't really want to sign up for that', especially with the events I'll get.

"They went ahead and held another qualifying school at the end of last year and even though it wasn't a full legit one they've still put person in basically every 10 spots.

"So my number [in the ranking order] was going to be touch and go to get five or six starts, now might only get two, it might get three.

"The ones I'm looking at they're spaced out a bit as well so you'd be away for nine weeks to play three events.

"I think at this stage, unless something major happens, I'll stay coaching at Federal."

Millar was still at home in Gungahlin when the storm hit, given he wasn't scheduled to tee off until lunchtime.

"It dropped a fair bit of rain, but they've been able to get back out there, which is good, and get it all finished," he said.

"[The thunder and lightning] was good in Gungahlin. We were over at my place and geez there was some good bolts. Wow."

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