Waterlogged Chepstow abandoned.
Clerk of the course Keith Ottesen inspected the course at 8am, but admitted there was no point in delaying a decision.
He said: "There's areas of the track that are waterlogged. We had 57 millimetres of rain from Monday to Wednesday and there was 47mm just on Tuesday.
"There was a little rain overnight and while some areas have improved, it is raining again now and there's no point in prevaricating about it."
Southwell has got the go-ahead to resume racing on Tuesday after the track passed a British Horseracing Authority inspection yesterday.
Racing has not taken place at the Nottinghamshire venue since November 20 due to flooding which affected the facilities as well as the Fibresand surface.
While a lot of the ground floor is still out of bounds, the BHA course inspectorate is happy for racing to take place.
"The course inspectorate has been round checking that everything is in place facility wise that we need for racing to go ahead," said clerk of the course Roderick Duncan.
"There will be limited public facilities, but everything is in place for racing to go ahead.
"Most of the ground-floor facilities will be closed for the first few meetings.
"We had trial gallops and the trainers and jockeys reported everything was OK."