Stuart Broad is still looking for his first wicket of the summer after Gordon Muchall and Durham dominated day three against Nottinghamshire.
Making just his second appearance in the LV= County Championship since 2012, Muchall struck a brilliant 158 not out to help the reigning Division One champions reach 335-4, meaning they trail by just 42.
Ben Stokes was also in the runs for Durham, the all-rounder making 61 in a fourth-wicket stand worth 133 that was eventually ended by Samit Patel.
The England selectors will be delighted at not only Stokes making runs ahead of the Test series against Sri Lanka but also Broad sending down 16 overs, even if he finished a rain-shortened day with figures of 0-68.
Lancashire gained the upper hand in the Roses battle against Yorkshire at Headingley, finishing Tuesday's play with a lead of 130 having bowled out their rivals for 243.
Tykes skipper Andrew Gale was left stranded on 95 not out - though he had been recalled on 25, initially being adjudged caught behind before umpire Peter Willey changed his original decision - as Tom Smith's haul of 5-49 put the visitors on top.
Opener Adam Lyth made an even 50 but from 66 without loss Yorkshire rather lost their way. Only Jonny Bairstow (20) offered any real support to Gale, who hit 13 fours in his impressive 113-ball knock.
Starting their second innings with an 82-run advantage, Lancashire lost two wickets in the same Tim Bresnan over as they reached 48-3 by the time bad light cut short proceedings.
William Porterfield made 118 and Ian Westwood 99 as Warwickshire battled back against Somerset, the hosts closing on 294-5 at Edgbaston to sit 117 runs behind.
The pair put on 163 for the second wicket on a rain-affected third day that saw Somerset hit back late on. Craig Overton's dismissal of Porterfield sparked a mini collapse, with three wickets falling for four runs.
Westwood had already by then fallen just shy of a century, becoming the third player in the match to be dismissed in the 90s after visiting duo Nick Compton (92) and James Hildreth (98).
Sam Hain (32) helped add 87 in a third-wicket alliance with Porterfield until both perished to Overton, who ended the day with figures of 3-68.
Meanwhile, leaders Middlesex are still yet to even start their clash with Sussex after the second day was washed out at Merchant Taylors' School Ground.
Having seen rain already ruin any chances of play on Monday, umpires Steve Garratt and David Millns made the call at 1.10pm to abandon any hopes of the match finally getting underway.
The toss is yet to even take place, meaning the two teams are likely to need to do some negotiating to raise the prospect of a positive outcome in the Division One fixture.