Leicester inspects and Fakenham fearing the worst for Thursday
Leicester officials are positive about their chances of beating the freeze for Tuesday's seven-race card, the highlight of which is the first running of the £30,000 Listed Charnwood Forest Mares' Chase.
The Midlands course has called a precautionary inspection at 8am due to the threat of overnight frost and fog.
Clerk of the course Jimmy Stevenson said: "There was no frost on Monday and we could have raced but we are forecast a slight frost tonight with the possibility of freezing fog and it's a bit hit and miss at the moment. If the forecast is correct we should be okay but we'll take a look."
There are no problems anticipated at Tuesday's other jumps fixture at Wetherby where it was perfectly raceable yesterday, but there could be problems later in the week further east at Fakenham, where racing is scheduled for Thursday.
Wetherby clerk of the course Jonjo Sanderson said: "We've warmed up since the weekend as I believe there is some milder weather coming in. We should have no problems if the forecast is correct as it's 5C here just now and only scheduled to drop to 0C tonight."
Prospects are less positive at Fakenham, where the cold weather that claimed four British jumps fixtures at the weekend was still in evidence on Monday.
Clerk of the course David Hunter reported: "We could not have raced today but the temperatures have gone up. We are forecast -2C for Monday night and Tuesday but -4C on Wednesday, which would put us in trouble. We'll know if that's accurate nearer the time."
A spokesman for the Met Office said: "Frost and locally dense patches of freezing fog will return across England and Wales on Monday evening and this may possibly be slow to clear across the south.
"Elsewhere, it will be mostly cloudy with sunny spells, especially across south-east England and north-east Scotland. Later in the week, it will becoming milder especially in the north and west."
Leicester Hurdles soft, Chase good (soft on Flat course crossings). Inspection 8am Tuesday due to possible overnight frost. Forecast overnight minimum of -2C, rising to 5C Tuesday daytime. Frost sheets deployed on vulnerable areas.
Wetherby Good to soft (light frost in places). Chance of frost overnight (low of 0C). Raceable yesterday.
Catterick Good to soft, good in places. Overnight frost expected -2C Monday night. Raceable yesterday. Frost sheets deployed on take-offs, landings and vunerable areas.
Ludlow Soft, good to soft in places. Raceable yesterday and temperatures set to rise.
Fakenham Good, good to soft in places (frozen in places). Currently unraceable with cold nights forecast down to -4C.
Warwick Soft, heavy in places. No problems expected.
Doncaster Good to soft, good in places. Temperatures set to rise.
Huntingdon Good to soft. No problems anticipated.