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Rain and a thunderstorm could hit Melbourne in the middle of Melbourne Cup Day, when about 100,000 people are expected to flock to Flemington Racecourse for the biggest racing event of the year.
The Bureau of Meteorology is predicting a warm and humid day with the chance of a shower or thunderstorm.
Attendees have been encouraged to pack their rain jackets, with a 70 per cent chance of rain putting dampener on the day.
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Senior Meteorologist Dean Narramore said the rain would likely appear in the afternoon and evening.
"Those heading to Flemington Racecourse should prepare for windy conditions with winds forecast to be north to northeasterly at a speed of 20 to 30 km/h, tending north-easterly 15 to 20 km/h in the evening," he said.
"Overall, for Victoria, it will be warm to hot and partly cloudy with isolated showers and thunderstorm activity across all but the far west of the state, mainly during the afternoon and evening."
Storm activity may be severe over parts of central and eastern Victoria with the risk of large hail and damaging winds.
It will be a relatively warm and humid day with a minimum temperature of 16 degrees and a maximum of 29 degrees.
For the latest forecasts and warnings go to our website www.bom.gov.au or the BOM Weather app.
