Melbourne Cup day expected to be interrupted by rain, and possible thunderstorm and hail

Revellers heading to Flemington Racecourse for the Melbourne Cup on Tuesday are in for a wet one.

The Bureau of Meteorology is predicting a cloudy day in the city for the race that stops the nation, with a 90 per cent chance of showers.

There may even be a thunderstorm and hail in the afternoon and evening for the public holiday.