Ryan Cooper’s 45 from 40 balls shone as Snainton sunk to 84 all out in 21.5 overs, Tom Hendry taking 5-31 and Adie Hollingsworth 3-18.
Josh Stockill (3-3), Ben Norman (3-18), James Wilson (2-25) and Kieran Jackson (2-9) then teamed up to dismiss Scalby for 63 in 27.4 overs.
Ebberston 2nds are second after their six-wicket win at home to Ganton.
George Hardie took 4-32 and Jon King as Ganton slipped to 78 all out.
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Reece Milner’s unbeaten 30 fired Ebberston to the victory.
Seamer & Irton 2nds earned a seven-wicket victory at 10-man Mulgrave 2nds.
Andrew Spenceley’s 46 not out at number eight helped the hosts to 125-8, Tom Greenwood bagging 3-35.
Openers Joe Tiffany (63) and Darrol Lewis (48) then guided Seamer to the win.
The Grosmont v Wold Newton and Wykeham v Fylingdales games were called off due to the wet weather.
The only Division Three game completed saw Scarborough RUFC earn a 123-win at Filey 2nds on Sunday.
The rugby club team posted 192-6 and Filey slumped to 69 all out in just 21.1 overs.
The only match to start on Saturday saw rain bring a halt to play with hosts Great Habton 2nds on 133-6 from 30.4 overs chasing Malton & Old Malton 3rds’ 161 all out.
Alistair Blacklee top-scored with 43 for Malton as Jordan Allanby snapped up a stunning 4-8 from nine overs and Vernon Smith bagged 3-47 in 8.3 overs.
Skipper Dan Walker (47) and Smith (32) looked to be guiding Habton home at 121-4 but both had departed to leave the game in the balance when rain halted play, Will Lock and Nick Schofield taking two wickets each.
Glaisdale v Muston, Nawton Grange 2nds v Pickering 3rds and Ravenscar v Folkton & Flixton 3rds were all cancelled.
Bridlington 3rds are setting the pace at the top of Division Four after their eight-wicket success at Scarborough 3rds.
Tom Melling top-scored with 27 as the hosts were 122 all out from 37 overs, Brian Heaton claiming 3-9 from five overs and Carl Parkin 2-29 in nine overs.
Openers Steve Lount, with 61 not out, and Matthew Fudge (38) then wrapped up the win for leaders Brid.
Second-placed Flamborough cruised to a 164-run home victory against Cayton 3rds.
Luke Dixon’s outstanding knock of 93, with help from Matt Emmerson (45) and Mark Abram (42) steered them to 224-4 from 40 overs.
Cayton then limped to 60 from 38 overs, Jack Waud taking 3-19 in eight overs while Marcus Garcia and Josh Garbutt bagged 2-14 apiece.
Wykeham 3rds claimed their opening win of the season at fellow strugglers Thornton Dale 2nds.
Fine batting from Scott Wardman (45), George Shannon (43no) and David Stockhill (39) steered Wykehamto 175-5.
Wardman’s fine all-round day was completed as he chipped in with 3-13 as Dale fell to 92 all out.
Goathland v Ravenscar 2nds, Scalby 3rds v Sherburn 2nds and Malton & Old Malton 4ths v Brompton 2nds were all cancelled.