Monday's jumps fixture at Newcastle must pass an 8am course inspection on raceday morning.
Further rainfall within the last 24 hours has left the Gosforth Park circuit heavy, waterlogged in places.
Clerk of the course James Armstrong tweeted: "@NewcastleRaces had 3.2mm of rain in last 24hrs. We are heavy, waterlogged in places. INSPECTION 8am on Mon 25th. Chance of light rain & 12C."