Officials at Wetherby have called another inspection ahead of Tuesday's meeting.
An initial check was made at 8.30am on Monday, but as there are still patches of standing water on the back straight, another inspection at 8am on raceday has been deemed neccessary.
The track tweeted: "Five millimetres sleet/rain on Sunday afternoon. Monday is forecast to be a dry day, with a steady breeze, however, there is further rain forecast overnight into Tuesday AM."
Officials added: "Therefore, we'll be holding a second inspection at 8am on Tuesday morning to assess conditions."
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