Following a course inspection at 4pm, it has been confirmed the 2012 PokerStars Senior TT will not be run.
After a number of delays, and a decision to cut the race from six laps to four lap, it was announced at 5.15pm, by rider liaison officer John Barton, that the Senior TT was off for the first time while the event has been run.
Conor Cummins, John McGuinness and Ian Lougher were among the riders on the course inspection.
However, the BikerPetition.co.uk Lightweight TT is still scheduled to go ahead, starting at 6.30pm. It had been reduced to two laps earlier, but will be back up to the full three laps when it gets under way.