Sandown's Betfair Tingle Creek Chase meeting and the Boylesports Becher Chase fixture at Aintree on Saturday must pass precautionary inspections due to the threat of high winds from Storm Darragh.
There is racing in Ireland this evening at Dundalk, tomorrow at Navan and on Sunday at Cork (Live on RTÉ2/Player) but so far there are no indications those meetings could be affected, and the status orange wind warnings this side of the Irish Sea are only in effect until 10am on Saturday.
The sole early GAA action on Saturday is the Munster Club IFC final between Austin Stacks of Kerry and Tipperary's Aherlow in Mallow (1.30pm) though heavy rain could spark pitch inspections, with the Munster and Ulster SFC club finals due to be decided on Sunday.
Connacht host Zebre in rugby's Challenge Cup at the Sportsground (5.30pm) on Saturday.
Galway is under a red weather warning today but conditions are expected to have calmed by tomorrow evening.
Cardiff's Sky Bet Championship fixture against Watford has been called off amid severe weather warnings for parts of Wales and the south-west of England.
The Football Association of Wales issued a statement on Friday afternoon saying all football matches in the country were being postponed on Saturday, following Met Office advice.
Sandown clerk of the course at Andrew Cooper is concerned about forecast gusts of up to 50mph during racing and will check conditions at 7.30am tomorrow.
"We’re expecting it to remain dry during racing on Friday before rain gets to us in the early evening. That will clear overnight, but that will bring increased winds," said Cooper.
"There are some suggestions the winds will be at their strongest at around midday time – and gusts of up to 50mph plus, possibly from first thing but certainly from mid-morning.
"A few of us have been kicking this situation around for 48 hours and the common consent seems to be that 50mph seems to be the tipping point, and arguably 45mph.
"You’ve got to take into account all aspects of putting on a day of racing, not just from an equine and rider point of view but for the public as well. All racecourses tomorrow are in that ball park.
"Because of that we’ll have a precautionary inspection at 7.30am and take it from there."
It is a similar scenario on Merseyside where, despite the ground likely to ride testing, the rain is not a real cause for concern but very strong winds are. As a result a precautionary inspection will take place at 7am.
Aintree’s clerk Dan Cooper said: "We’ve got an amber warning in place for high winds.
"The difficulty is there is a slight lull at the time we’ll be doing the course walk in the morning, it’s looking relatively manageable (then) so the difficulty is do you begin predicting what is to come?
"The rain, going-wise, is OK, but the wind is the big threat and if we get to what is forecast (50-60mph guts) then there certainly will be some safety elements to consider. It’s a tricky forecast for us all.
"The mean average looks like we can manage, but the gusts are tricky, and there’s no forecast as to how often the gusts are, you don’t know they are coming until they are on top of you"
Chepstow, which stages the Welsh Grand National Trial, will hold a precautionary inspection at 7.30am.
The going is currently soft and rain is forecast but the danger is once again the prospect of strong winds.
Wetherby inspect at 3pm on Friday due to standing water in the back straight. Should that recede in time there is then the danger of high winds on Saturday.
Watch the Hillyway Chase Day at Cork on Sunday from 1pm on RTÉ2 and RTÉ Player
