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."
20 October 2014Judge in Breeders' frame
Hill stars for Stoute and Moore
Gabriel lifts Garnet for Deegan
New One back with a win
Light career hangs in balance
Stars shines on hurdling debut
King big guns ready to start
Tullius camp consider options
Doyle unlikely to appeal Ascot ban
Mullins prepares formidable team
19 October 2014New One breezes to victory
Lavelle has Becher plan for Lodge
Riches heading on road north
Down Royal plan for Tiger
New makes Kempton return
Panther hunting Canadian prize
Sun takes a shine to Cork
Hobbs upholds Showcase record
Another gold strike for Bronze
Gallant Noble a true Champion
Head turns on Charm in QEII
Madame is Ascot leading lady
Forgotten rules for Weld
Byron is poetry in motion
18 October 2014Forgotten rules for Weld
War misses Breeders' date
Rakti reaps Caulfield reward
Chatez bids for Balmoral crown
Lavelle duo top Cheltenham card
Integral takes on the boys
Noble on Champion mission
Belardo a Dewhurst sparkler
Together stands firm for Ballydoyle
Ivawood felled by plucky Thought
Crowley doubles up on Berkshire
Tendon injury sidelines Tent
17 October 2014Minstrel calls the tune
Sceaux set for chase campaign
Sari seeking Ascot gold
Charm out to show winning Spirit
Estimate aiming to go the Distance
French veteran back for more
O'Meara - G has the Force
Fallon considers American switch
Cossack maintains Elliott's record
Vautour goes chasing
Lucida heads Godolphin trio
McCoy sits out weekend action
No Middle ground for classy Ivawood
Big guns hold sway for QEII
Cirrus stands firm for Champion
Hanagan: Estidhkaar no soft touch