Nineteen fours, three sixes and 146 runs later he fulfilled that goal in a big way, guiding Western Zone to a thumping six-wicket, bonus-point win over Central Northern at Scots All Saints Main Oval.

The Bathurst all-rounder spent more than two hours in sweltering conditions slashing the Central Northern bowlers to all corners of the ground to record one of the greatest centuries of his young career.

On the back of his unbeaten knock Western successfully chased down their opponents' total of 234 with more than 11 overs to spare.

Mitchell had been dismissed for 8 and 9 in Western's completed games and was sitting on 20 not out when Tuesday's match against ACT-Southern Districts was abandoned.

Those results left him hungry for more time at the crease.

"I felt good in the nets during the lead-up so it's great to go out there and get some runs," Mitchell said.

"I was struggling at the start of the week when I played a few silly shots so today and I wanted to give myself those extra balls and time to get myself set before we chased it at the end.

"Once I got to the half century I'd adjusted to the pace of the pitch and I knew there were runs out there. I didn't want to be the one sitting in the sheds not cashing in."

Mitchell survived a huge LBW shout on 94 before he brought up his ton in the following over, and once he reached his century the floodgates opened.

Anything even slightly full of a length was boundary food for Mitchell, who was finding all the gaps and giving the Central Northern fielders virtually no opportunities.

Tom Coady (24) was happy to play the supporting role for Mitchell until he was run out before Lachlan Coyte (11 not out) continued what his dismissed teammate had been doing well.

Earlier in the innings Bailey Brien (18) and Ben Wheeler (13) made starts before they were caught.

During the Central Northern innings it was Hugh Middleton (3-26) and Brock Larance (3-40) who played the starring roles for Western with the ball.

Mitchell also had a great day with the ball, picking up the first and last Central Northern wickets of the innings to finish with 2-51.

Harry McGregor (1-28) claimed the other wicket while Cooper Brien picked up a run out.

Beau Parnell top scored for the visitors with 50 while Jack Montgomery (1-28) was the pick of the bowlers.

The victory followed Western's disappointing loss to North Coastal on Monday's opening day of the carnival and their Twenty20 win over Central Coast on Wednesday afternoon.

Tuesday's clash and Wednesday's first T20 fixture were abandoned due to the smoky conditions and the hazardous air quality in Bathurst.

In Thursday's other games North Coastal knocked off ACT-Southern Districts and Illawarra defeated Riverina in a battle of the cellar-dwellers, while Newcastle and Central Coast's final-day clash was moved to Sunday.

Newcastle and Central Coast were the top-ranked sides heading into Thursday's final day and as such the game will decide the 2019-20 champions, it starts at 10am at Toronto's Ron Hill Oval.