At the Citylets Grange in Edinburgh today, Warwicks batted first and lost Jon Trott for a single and then Ian Bell chipped in with 28 before being caught by Stander.
That saw the score at 57-2 and Tim Ambrose was the next player to lose his wicket when he was out for 19 as the hundred mark was reached.
Ian Westwood made 25 and Rikki Clarke three whilst Jim Troughton hit a good innings of 77 from 125 balls including seven fours.
Ant Botha and Keith Barker both hit sixes to take their scores past the thirty mark as Warwicks completed their fifty overs on 242-6.
Scotland came into bat and Chris Woakes caught and bowled Watts for 20. Botha was a man in form and took three wickets to slow down Scotland's scoring rate.
Rain interupted play but with just over nine overs to go and Scotland on 172-7, Warwicks were well ahead on the Duckworth/Lewis method.
Play resumed around 5.30pm and two overs were lost with a new target of 238 in 48 overs set.
Barker was denied the eighth wicket due to Warwicks not having six players in the circle as Scotland. However, it came a few balls later when Ian Bell caught Dummond.
The home side needed ten an over but Craig Wright went for a big shot and was caught on the boundary by Jon Trott to leave the score on 179-9.
Chris Woakes ran out Rogers and Scotland were all out for 187 to give Warwicks a fifty run victory under the Duckworth/Lewis method.
Wins at Middlesex on Monday and Kent on Wednesday will give them a place in the Quarter-Finals.
In the test match at Chester Le Street on day three, England close their innings on 569-6. West Indies were 51-2.