Organisers will inspect the Mountain Course throughout this afternoon to see if conditions recover enough to allow this evening's Manx Grand Prix practice session to go ahead.
At least two inches of rain over the hills and over an inch at lower levels fell this morning, leaving large areas of standing water.
The weather is improving but Clerk of the Course Phil Taubman is worried about water running onto the roads from saturated land:-
Football: Hospital Cup & Junior Cup reach quarter-finals stage
Big Combination Two title clash also on the cards this weekend
Rugby: 2026 cup finals weekend to round out latest season
Manx Cup and Manx Plate up for grabs at Port-e-Chee
Isle of Man Youth & Junior Cycling Tour returns for 2026
This weekend marks 25 years since series first began
Cricket: Domestic season returns this weekend
Players returning after winter layoff
Football: Peel make it back-to-back premier league titles
Westerners awarded points ahead of weekend to seal success