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."
16 April 2014True class tells at Newmarket
Buywise books big-race targets
Sandiva strikes for Dettori
Power runs Free at Newmarket
Magnus magic for Hannon
Cantlow on track for Fairyhouse
Kingman well-being delights Gosden
Walsh to ride out this weekend
Byron all set for Hong Kong mission
Gosden stays in winning Spirit
'Tentative' Cup entry for Zarkandar
Draw joy for Grandeur
Kiyoshi pleases in Newmarket spin
Leather in frame for Jockey Club
Tropics warming to Abernant task
Judge lays down law in Sefton
Toormore on trial in Craven
All eyes on Strauss at Newmarket
Ridge out to peak at Newmarket
Eduard camp look to the future
Mohammed outlines Educate plans
Dreaper duo on National service
Scott learns Melodic lesson
Bobs Worth unlikely for Punchestown
Williams - Buy needs to Wise up
Fly on track for more records
Arod team take cautious approach
Obliterator ready to roar for Lyons
Night camp favour French Guineas
Free and easy for 'forward' Medinah
Fahey braced for Sand storm
15 April 2014Minstrel a Punchestown possible
Joe considered for Cork encounter
Toormore the star turn in Craven
Inch edges closer to Oaks bid
Appleby backs Ring to fire
Oliver wants more from Set To Go
Double tops for Easterby
Varian - Hill in peak form
Hawk has eyes on Lingfield prize
Doyle in awe of Kingman engine
Art given Victoria target
Ground key to Thakhira Classic aim
Cyclone heading for Punchestown
Hopes still high for Hydrogen
Botti in no rush with Hawill
Soumillon booked for Spanish raider
Obliterator takes Newmarket trial
14 April 2014Taaffe ponders Argocat options
Meain machine set for Punchestown
Competitive field for Nell Gwyn
Curragh workouts delight O'Brien
Inis all the way in Listed heat
Sruthan away to winning start
Burke keen on Rivellino claims
Ground key to Cubanita plans
Derby entry Ectot shows class
Back to sprinting for Astaire
Berkshire team mull options
Millman relishing Carpenter future
13 April 2014Newmarket ground pleases Prosser
Golden Wonder states Classic case
Rock rolls to Ballysax success
Eduard one for the future
Scottish glory for Bowen and Co
Spencer strikes on Kaka
Sparrow takes flight at Ayr
Kingman new favourite for Guineas
Estimate easing her way back
Stack star set for Alleged return