Haydock could start their two-day meeting on Friday with heavy in the going description should the anticipated rain fall.
The ground at the Merseyside venue was soft on Thursday afternoon but as much as 12 millimetres of rain was forecast before the morning.
Should that be the case then clerk of the course Kirkland Tellwright expects conditions to have deteriorated slightly ahead of Friday's card.
He said: "The rain did begin to come late afternoon and we might get as much as 12 millimetres. If we do get that much I guess the word heavy will be mentioned in the going description.
"Friday we have been told to expect three millimetres of rain, then it's dry on Saturday."
The meeting at Towcester on Sunday is subject to a precautionary 8.30am inspection on Friday.
While the going is described as good to soft, soft in places, there are areas of standing water.
Clerk of the course Robert Bellamy said: "We've been dry but we had 19 millimetres of rain on Wednesday and have standing water in places.
"The forecast is pretty horrendous and it doesn't look good at this stage, but we'll reassess things and see where we are."
22 May 2015Gleneagles tees off at Curragh
Stars dazzles at Goodwood
Dettori receives golden ticket
Paris in Sandown shake-up
Tudhope suffers Haydock blow
Gatsby in great form for Gold run
O'Brien banking on Found progress
Ivawood targets Guineas revenge
Sole seeking home success
Brooch aiming to sparkle again
Dods hoping Angel can soar
Remote makes Festival return
Force back for Temple test
Cumani hangs fire as Dubai dazzles
Dods hoping for Angel delight
Epicuris team seek dispensation
Treve buzzing for Corrida comeback
No going concerns for Gatsby
Gleneagles spearheads Guineas field
Power to stay in Ireland
Muthmir earmarked for Haydock date
21 May 2015Ground concerns for Pretend
Ball back on duty at Worcester
Ground key to Boy Gold run
Fitz up against it for Galway
Hobbs to race in Godolphin blue
Haggas has plenty to Wonder about
Straight to Ascot for Rizeena
Curragh all set for big weekend
Byron in Greenlands hunt
Sandown or Epsom options for Spring
O'Brien looks to Tapestry
Europe the 'horse of a lifetime'
Legatissimo in Oaks reckoning
20 May 2015Top fillies given Irish Derby entry
Girl could spark Ascot dreams
Coolmore acquire Pharoah rights
Cirrus leads Longchamp septet
Time called on Europe career
Doyle set for Kazeem Gold run
RMG and ARC announce joint venture
Lyons planning dual Guineas raid
Albany aim for Spanish
Maarek team wait on ground
Birdcage takes flight at Dundalk
Gatsby tops Tattersalls entry
Great expectations in Needler
Karakontie likely to bypass Ascot
Devonshire added to Guineas field
Arod in Ascot frame
Elm team have high hopes
Varian retains Belardo faith
Ground to decide Power aim
19 May 2015Fanning targets swift return
Medrano camp turn to Hughes
Cossack named jumps champion
Toormore team get thinking caps on
Bear back on the move
Wind fired up for Temple test
Ballynagour makes French connection
Walker retains faith in Moon
Mimic in hat for Yeardley surge
Manhattan on menu for Protector
Pandora to swerve Oaks
Hannon duo primed for Guineas
Fabre rules out Lion Derby date
Weld respects Horn claims