Only 26.4 overs were possible at Edgbaston, where Warwickshire, having already secured maximum batting points on day one, were all out for 450 with Keith Barker reaching his fifth first-class hundred.
He ran out of partners in his unbeaten 102 as Graham Onions collected his first five-wicket haul of the season after accounting for Richard Jones.
But it was Jones who took the crucial wickets of Mark Stoneman and Scott Borthwick, both of whom inexplicably hooked to fielders on the boundary, as Durham slumped to 50 for three in reply.
Just 44 overs were played at Trent Bridge, where hosts Nottinghamshire limped to 195 for eight against Somerset.
Craig Overton took the final three wickets to leave Somerset firmly in the ascendancy, with Nottinghamshire still trailing their opponents by 117 runs.
Somerset wicketkeeper Alex Barrow also earned praise for his show of sportsmanship, when, after gathering a nick down the leg side to apparently dismiss James Taylor, he acknowledged he had not taken the catch cleanly.
Will Smith fell seven runs short of a century, but his efforts and Gareth Berg’s 50 put Hampshire in a commanding position against Middlesex in the 62.1 overs of play at the Rose Bowl.
Smith and Berg were both dismissed by Neil Dexter, who claimed a rare five-wicket haul, as Hampshire were skittled for 413, while Middlesex reached 102 for three in response.
In Division Two, Lancashire captain Steven Croft managed to complete his century before he was last man out to put his side in control against Leicestershire in 46 overs of play at Grace Road.
Croft, resuming on 98, added four runs to his overnight score as the Red Rose were dismissed for 368, with Leicestershire reduced to 195 for six in reply – although the hosts still have skipper Mark Cosgrove at the crease on 65 not out.
Matt Coles and Darren Stevens picked up three wickets apiece as Kent, having won the toss and decided to field, bowled out Gloucestershire for 193 inside 65 overs on their opening day of their encounter in Bristol.
Glamorgan captain Jacques Rudolph led the way with an unbeaten 81 in his side’s 187 for five off 69 overs against Essex at the Swalec Stadium.
The inclement weather made sure there was no prospect of play at Wantage Road, where Northamptonshire were due to begin their clash with Surrey.