The clerk of the course says tomorrow's TT contingency session will be used.
Thursday will see roads close for the sidecar and supersport races.
The decision to hold the races will depend on weather.
The contingency closures means the roads will close from 10am until no later than 9.30pm.
Art anarchists "hiding gold bars" in Douglas this week
No cases of terror financing through charities
You can now adopt an ambulance
Case for horse tram tracks 'under final review'
Council spends more than £1m on beads for cavities
Police recruitment drop-in sessions tonight
Ferry terminal and universal basic income on Keys agenda
Key Ramsey roads to shut for over a week