Durham v Northamptonshire finishes as a draw after a second successive day is abandoned without a ball being bowled.
Nottinghamshire and Hampshire draw after a third straight washout, while other games are also affected by bad weather.
South African Ricardo Vasconcelos makes an unbeaten 105 as Northants rally well to lead against Durham at the Riverside.
Ben Raine and Brydon Carse came to Durham's rescue with an unbroken century stand on day one against Northamptonshire.
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Players from Northampton Saints and Northants cricket put each other through their paces in a joint training session.
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How to get into cricket - physical exertion with a chess-like element in matches which range from half an hour to five days.