MARK Stoneman's impressive progress to his 15th first-class century helped Durham to add 130 without losing a wicket in the afternoon session as Middlesex toiled in a howling wind straight off the Arctic.
England Under 19 batsman Jack Burnham initially outpaced his partner in reaching 61, but the left-handed opener was in full flow approaching tea.
A spanking cover drive off Toby Roland-Jones took him to his century off 139 balls in the over before the break.
As the wind gathered strength the umpires had to send for heavier bails, but for the most part it was a sunny afternoon.
Burnham was slightly fortunate when he lofted Roland-Jones just out of long leg's reach, but he confidently drove the next ball through the covers for his ninth four, taking him to 50 off 97 balls.
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