Thursday's jumps meeting at Market Rasen is subject to a precautionary inspection at 8am, joining Wincanton and Leicester in needing checks before racing.
Officials have called an early check in light of a forecast for light frost at the Lincolnshire venue, with the going good to soft, soft in places.
Raceday clerk of the course Robert Bellamy said: "The forecast is for a minus 2C frost, but a possible wind chill of minus 7C, the east side of the country is particularly cold.
"We are perfectly raceable, it's not like we've had frost after frost, but we wanted to be prudent and warn people in case the forecast is wrong when one isn't so bad and another is horrendous."
Thursday's meeting at Wincanton must also pass an 8am precautionary inspection, with overnight temperatures set to drop to minus 2C or possibly even lower.
Clerk of the course Barry Johnson said: "I'm very confident we'll be fine - we'll be OK with minus 2C - but some forecasts are predicting minus 4C. There's no frost in the ground now, but the ground is quite wet. It's very much a precautionary inspection."
Leicester also have an issue with frost, as temperatures set to drop to as low as minus 5C.
A maximum daytime temperature of 2C on Thursday has also been forecast.
Clerk of the course Jimmy Stevenson said on Wednesday morning: "There's no frost whatsoever this morning - we are perfectly raceable - but there is quite a severe frost forecast tonight.
"If we think we have a chance at 8am, we'll probably call another inspection later in the morning and then, possibly, look again. We've got to be patient."
21 October 2016Mark Johnston pays tribute to The Last Lion as he retires to stud
Competition watchdog to probe online gambling firms amid unfair treatment claims
Charlie Appleby eyeing Breeders' Cup with Latharnach
Middle Park winner Shalaa retired to stud
Cloudy Dream stars as Brian Hughes bags Carlisle four-timer
I'dliketheoption sparks Jonjo O'Neill double at Ludlow
Thoughts turn to Dubai for Roger Varian and Postponed
Alpha Des Obeaux off the mark over fences at Thurles
Preis is right for Algometer
Henry de Bromhead to launch three-pronged Cheltenham raid
Yucatan spearheads Aidan O'Brien team as Capri swerves Doncaster date
20 October 2016'Special' Sprinter Sacre stands tall in Nicky Henderson dream team
'Sore' Alain Cawley faces lengthy absence after Kempton fall
Mick Fitzgerald remembers Rough Quest after death of Grand National winner
Betway signs deal to become Authorised Betting Partner
Dale Gibson pays tribute to Mark Birch
Ger Lyons backs Colin Keane to reach the top
Frankel colt Cracksman sparks Derby dream with Newmarket victory
Qewy strengthens Godolphin hand for Melbourne Cup
Melesina lands Group Three gold in France for Richard Fahey team
Henry Candy leaning towards Breeders' Cup Mile for Limato
Bay Of Poets pleases ahead of Racing Post Trophy
Adrian Keatley pondering French outing for Jet Setting
Gilgamboa on course to make Down Royal return
Thistlecrack entered for chasing debut at Chepstow on Tuesday
Annie Power pencilled in for Morgiana return
19 October 2016Northern stalwart Mark Birch dies, aged 67
Dreamfield makes it two from two at Newmarket
Sweet success for White Chocolate at Newmarket
Rohaut sets sights on Hong Kong trip with Signs Of Blessing
Cyril Murphy ready to plot Rawnaq Cheltenham route following Far Hills glory
Qewy claims Geelong Cup glory for Charlie Appleby
Leg injury rules Tryster out of Japanese challenge
Smart hurdler Old Guard off the mark over fences at Exeter
Shutter Speed in the frame for big things next season
John Gosden - Hong Kong an option for Jack Hobbs
My Dream Boat back for more next year
Dermot Weld expecting 'imminent' verdict on Harzand and Fascinating Rock
So Mi Dar and Journey to bypass Breeders' Cup
Joe Tuite vies for Royal-Oak rule with Litigant
Karl Burke plots Ascot Champions Day return for Quiet Reflection
18 October 2016Zelaniya swoops for Gowran Park maiden success
Lancaster Bomber spearheads Killavullan entries for Aidan O'Brien
Sir John Lavery gets off the mark at Gowran Park
Frank Berry leads tributes to Francis Flood
Eddie Hales receives huge stable fillip from Gigginstown House Stud
Trainer Francis Flood dies aged 86
All-weather ace Grendisar close to comeback for Marco Botti
Neil Mulholland has Cheltenham-bound Fox Norton 'ready to go'
Wilson Renwick announces riding retirement
Breeders' Cup Turf target for Woodbine hero Erupt
Martin Keighley mulling hurdles return for Any Currency
Henry Brooke hoping for swift return as he continues recovery from Hexham fall
Oliver Sherwood eyeing Aintree return for Many Clouds
Aidan O'Brien sextet in Trophy frame at Doncaster
Michael Dods confirms Mecca's Angel retirement
Hugo Palmer reveals Galileo Gold to stay in training
Rebecca Curtis keen to send Irish Cavalier to Wetherby