The meetings at Kempton and Lingfield on Saturday face inspections early on race-day morning.
Kempton officials have called a 7.30am inspection, with the all-weather circuit at the Sunbury venue covered in snow.
Clerk of the course Barney Clifford, who is currently in France, said: "They've had three inches of snow, it's still snowing and there is more snow forecast. The course is not raceable now and we'll just have to see what they can achieve."
He added: "It is not just about the track, there is the infrastructure and everything else to consider. They will inspect at 7.30am and they'll know what can be achieved by then."
Lingfield will inspect at 7am after losing Friday's card due to snow, clerk of the course Neil Mackenzie Ross finally admitting defeat after staging inspections at 8am, 10am and 11am. He called off the meeting before a planned noon check.
He said: "We are just struggling with the machinery on the track. We can't get it round quickly enough to keep the track fit for racing. While it is not particularly heavy snow, it is coming down continuously, which means we aren't able to keep the track safe and fit.
"We need to go and take stock of the situation, keep working the track for the rest of the day and overnight if needs be."
Friday's meetings at Wolverhampton and Chepstow were also abandoned on raceday due to snow.
18 June 2013
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O'Brien sounds War cry
Minute's silence remembers Cecil
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17 June 2013
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Treve in stunning Diane win
Sapphire target for Trees
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16 June 2013
Songbird aiming to fly highMovie has Newmarket on radar
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Salsify on summer break
Kempton target for Benbulben
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Balding on mark with double
Morawij in a hurry in Scurry
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15 June 2013
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Balding receives OBE
Victory on a plate for Montaser
Magician run in the balance
Secret set to make Ascot stand
Probert return delayed
Nagle covers Maarek options
Ribblesdale chance for Lark
Walker hoping Guns will fire
Estimate in Royal Gold run


