Kane Williamson made the highest score for Northern Districts as he plundered the Wellington bowling attack to all corners of the Lincoln No 3 ground during their Plunket Shield clash on Tuesday.
The 21-year-old ended the day's play unbeaten on 252, with his side on 540-6, after he began the morning on 76 and surpassed the previous record score of 241 made by Daniel Flynn against Otago last year.
Williamson and Brad Wilson (85) set the tone during the morning session against a Wellington attack, which featured six bowlers that had all played for New Zealand in some form of the game during the past three years.
As his partners came and went, and all made starts along the way, Williamson held firm and at the close of play his 548-minute, 369-ball stand, which was his seventh first-class ton, included 28 fours and a six.
He could add to his record knock, depending on whether Northern decide to declare overnight, as they still have two days to play and a mammoth first-innings lead, after they rolled Wellington for 162 on day one.