Organisers are hoping to be able to get a practice session in this evening
The Clerk of the TT Course is hoping conditions will improve enough for an evening qualifying session today.
Gary Thompson says roads will remain open until later as a result of the deteriorating weather conditions.
A further announcement will be made at 4pm.
If conditions improve, it's hoped Barrule Park to the Bungalow will close at 4.45, followed by the Bungalow to Creg-ny-Baa by 5pm, and the rest of the course at 5.30pm.