Racing at Plumpton this afternoon has been abandoned due to a waterlogged track.
An inspection was called on Sunday afternoon for 8am on raceday, but further significant rain overnight led to a decision to abandon being made earlier.
Clerk of the course Mark Cornford said: "When I got here we'd had 33 millimetres of rain from 8am on Sunday until 5.40am this morning.
"It's eased off a bit but we could possibly get another three millimetres this morning before clearing by midday, but that's too late for us.
"There's water lying all round the bottom bend and in other isolated areas."
The meeting at Ayr on Tuesday is subject to a precautionary inspection at 7.30am.
Officials report a threat of sub-zero temperatures overnight.
Clerk of the course Emma Marley tweeted: "Conditions heavy for racing tomorrow. Precautionary inspection 730am Tues due to possibility of sub-zero temps overnight."
Officials at Catterick were able to cancel a planned inspection for this afternoon's meeting which will go ahead as planned.
There had been a fear of snow overnight putting the fixture in jeopardy, but clerk of the course Fiona Needham reported no problems much earlier than the 8am check that had been scheduled.
She said: "There's no snow or frost, so we are good to go and cancelled the inspection.
"We had five millimetres of rain and sleet, but the snow was confined to the higher ground."
The ground is described as soft, good to soft in places.