Result: Durham (244 & 385/8d; Jennings 171*, Onions 65) drew with Nottinghamshire (313 & 17/1)
Persistent rain throughout the late morning and early afternoon kept the players off the field and the umpires called a halt to the day shortly after a 2pm inspection.
There had been the prospect of starting on time at 11am until the rain began a matter of minutes before the players were due to enter the pitch.
Durham take nine points from the fixture to Nottinghamshire’s 11 and travel to Yorkshire for the next game on Tuesday.
Close, Day Three: Nottinghamshire (313 & 17/1) trail Durham (244 & 385/8d; Jennings 171, Onions 65) by 299 runs
Keaton Jennings wrote himself into the history books and Graham Onions made a maiden career half century on the third day of Specsavers County Championship action against Nottinghamshire.
The left-handed opener joined Michael Di Venuto and Paul Collingwood as the only players to score six Championship centuries in a season for Durham and went on to make an unbeaten 171.
Durham were 385/8, leading by 316, when bad light forced a break, prompting a declaration.
The sun re-emerged and Nottinghamshire, with eight overs to bat, reached 17 before Onions trimmed Jake Libby’s off stump with four balls left, leaving the visitors requiring 300 from the final day and Durham needing nine wickets.
Five of Jennings’ six hundreds have come at Emirates Riverside and this third-day surface had the visitors looking careworn by lunchtime.
Despite having a nightwatchman to bowl at, they went through the morning session wicketless as Onions passed his career-best 41 and went on to contribute 65 to a stand of 162, the highest stand for any wicket in 2016.
Onions applied himself studiously to his task and made only eight in the frst 45 minutes. He then grew in confidence, driving Gurney for four and lifting Imran Tahir over mid-on as he scored 49 of the 118 runs added in the session.
A straight drive off Fletcher took him to his maiden half-century off 119 balls, earning rapturous applause and a hug from Jennings.
After Onions fell lbw when trying to hit Samit Patel over mid-wicket, the best support came from Barry McCarthy with 28 in an unbroken stand of 51.
Fletcher took two wickets with the new ball and Tahir went on a celebratory jig through the covers when Stuart Poynter inside-edged a drive into his stumps.
Jennings proceeded at the same measured tempo, reaching 50 off 112 balls, his hundred off 204 and 150 off 285.
He fiercely put away any short, wide stuff from the left-armers, drove sweetly and carefully nudged ones and twos. He also showed the skill which allowed him to score 88 in the NatWest T20 Blast final with three perfectly-executed reverse sweeps.
Close, Day Two: Durham (244 & 83/3) lead Nottinghamshire (313; Libby 144, Lumb 82; Rushworth 3/75) by 14 runs
New ball wickets restricted the deficit to 69 but Durham need to fight hard tomorrow on the third day of the Specsavers County Championship match against Nottinghamshire at Emirates Riverside.
The final six wickets fell for 45 runs as Notts were eventually bowled out for 313 following Jake Libby’s ton.
Chris Rushworth and Graham Onions made the most of the new nut and ran through the lower-order to finish with three wickets apiece, with the 23-year-old opener last man out.
The Durham openers then put on 67 but they ended the day on 83/3 and ahead by 14 runs with Keaton Jennings unbeaten on 34.
Mark Stoneman edged Steven Mullaney to slip for 39, then Scott Borthwick fell for nought when he padded up to a straight one from Harry Gurney.
With three overs left Imran Tahir came on and skidded a quicker one through an attempted pull to bowl Jack Burnham for three.
Earlier, Libby completed his 191-ball century just before lunch and was lbw to Paul Coughlin in the last over before tea.
He was missed on 87 by Michael Richardson, who had just been posted at leg gully, and survived a difficult chance to Borthwick at slip on 116.
And the visitors would have been in trouble without him, despite Michael Lumb’s fluent 82.
Lumb edged a drive to second slip when Onions went round the wicket, then Brendan Taylor sliced to backward point before Libby and Samit Patel set out to build steadily.
They had put on 82 in 32 overs when Jennings came on for a couple of overs before the new ball and his fifth ball skidded through low to bowl Patel for 37.
That sparked the loss of the last six wickets for 45 as Chris Read and the two Lukes, Wood and Fletcher, all fell to the new ball.
Imran Tahir saw off Onions and Rushworth, only to drive Borthwick to extra cover before Libby departed in the next over.
Close, Day One: Nottinghamshire (129/2; Lumb 68*) trail Durham (244; Stoneman 49; Gurney 6/61) by 115 runs
An post-lunch collapse leaves Durham with a big fight on their hands for the remainder of the Specsavers County Championship match with Nottinghamshire.
Harry Gurney finished with 6/61 as Durham lost nine wickets in the afternoon session to be all out for 244.
But after quickly reducing the visitors to 16/2, but Michael Lumb survived a streaky start to take them to 129/2 in partnership with Jake Libby.
After captain Paul Collingwood won the toss and chose to bat, the openers raced to 77 without loss after 14 overs.
At that point 33 had come off the previous three, with Keaton Jennings taking 15 off Gurney’s second over, including a six carved over backward point.
Mark Stoneman drove Imran Tahir for six over long-on, but with both batsmen on 33 the fun ended when Jennings was lbw on the front foot to a ball from Gurney which swung from outside leg stump.
Tahir, on for the 12th over, conceded 37 in eight as Stoneman progressed to 49 and Durham were 115/1 at lunch.
The collapse started from the second ball on the resumption as Scott Borthwick chased a wide one from Gurney and was caught behind.
Stoneman departed with extreme reluctance in the next over, when he tried to clip a Steve Mullaney swinger to leg and was adjudged to have tickled it to Read, who was standing up to the medium pacer.
Four wickets had gone down for six runs when two more fell on 121. Jack Burnham pushed forward and edged Gurney behind then Michael Richardson was lbw third ball.
Durham’s plight took a fresh twist when Paul Collingwood was struck in the nether regions by Gurney and went down poleaxed.
He retired on seven but returned with a runner when two more wickets had fallen and remained unbeaten on 33, the final 12 runs of the innings coming from his two driven sixes off Samit Patel.
The left-arm spinner had two for none after two overs as Ireland duo Stuart Poynter and Barry McCarthy surrendered. Poynter played well for 42, only to shoulder arms to one which went straight on, then McCarthy swung across the line and was also bowled.
With Jennings in charge as Collingwood stayed off the field, Nottinghamshire’s reply got off to a rocky start when Graham Onions got one to lift sharply off a length to have Mullaney caught behind.
Tom Moores edged Chris Rushworth to second slip and Lumb survived two edges in the same over. One just evaded gully, the other dropped fractionally short of third slip’s right hand.
On six he looked fortunate not to be lbw to a ball from Onions which struck him on the back leg. But he continued the day’s stroke-playing theme as a combination of edges and middled shots took him to 50 off 61 balls.
He was on 68 at the close with Libby having made a more composed 51, completing an 86-ball half-century by clipping the penultimate delivery through square leg off Rushworth for his third four.