A provisional all-chase card has been programmed by the British Horseracing Authority for Sandown on Friday in an attempt to safeguard the fixture.
This will consist of the three chases originally scheduled plus three additional chase opportunities.
All additional races will be free to enter and a final decision on whether the existing hurdle races will be abandoned and the provisional chases activated will be made at 8am on Thursday.
Andrew Cooper, clerk of the course at Sandown, said: "We saw 17mm of rain at Sandown Park on Sunday followed by snow yesterday morning. As a result parts of the hurdle course are currently saturated. We are expecting further rain here on Thursday, with some forecasts suggesting as much as 10mm.
"In order to give ourselves the best chance of staging a day's racing here on Friday we have asked BHA to provisionally schedule an all-chase card with six races."
Sandown's going is currently described as heavy, with soft places in the back straight.
Meanwhile officials at Musselburgh have called a precautionary inspection for 8am on Wednesday ahead of the meeting that afternoon. Ground conditions are described as good, but with a "tricky forecast".
Clerk of the course Harriet Graham tweeted: "Precautionary Inspection 8am due to forecast snow starting between 7-9am changing to sleet/rain later +3 Tricky forecast."
An 8am precautionary inspection has also been called for Wednesday's meeting at Thurles due to the uncertainty of the weather forecast.
11 March 2014Last and First in Gold frame
Injured Maguire out of Festival
Judgement day beckons for Fly
Curtis wants Scholfield for Tea
Que takes aim at Festival landmark
Irving strives to rule Supreme
Champagne in sparkling form
Sire spearheads Queen Mother entry
Confidence behind Conor
Special One bids for Champion glory
10 March 2014Maguire airlifted to hospital
Clouds lined up for RSA
Gold hopes fading for Topper
Ruby ready to Rock
Suspensory problem sidelines Chris
Mullins 'very happy' with Fly
Cooper raring to go after fall
National glee for supersub Mullins
Francome fancies New One revenge
Quinn targets another Triumph
Buck's primed for World title bid
Cheltenham team monitor ground
Fenton delays Instalment call
Activial to duck Festival mission
Hope springs eternal for Encore
Fab Fly takes on eight in Champion
9 March 2014Fall leaves Cooper 'badly winded'
Cooper warms up with double
Cooper warms up with double
Avenue roads lead to Irish Oaks
Dude's the main man
Top trainers reject watering
Hinterland takes Champion test
Baltimore sets up bonus bid
Warrior wins Trial battle
Fallon hits Meydan heights
Chartreux bounces back to best
Brave Vic has Final word
Soumillon strikes on super Shea
On His Own joins Gold Cup field
8 March 2014Queally hits Sandown target
Briar tops Bartlett contenders
Calipto leads Triumph hopefuls
Ginge fires burn brightly for Neild
Creek forced out of Gold Cup
Milan targeting Final glory
McCoy to miss Sunday and Monday
Exchange rate pays dividend
Temps doubtful for Festival
Conor settles in at Cheltenham
De Bromhead sweet on Special
Epsom to honour St Nick
Mullins dominates JLT entries
Al and Dynaste top Ryanair field
Big two lead World possibles