Victoria's soggy summer is set to continue with thunderstorms tipped to dump more rain on large swathes of the state.
Between 40 and 70 millimetres of rain is expected to fall in Victoria's northeast and central areas on Friday as a low-pressure system moves east.
Isolated totals could surpass 100mm within the warning area, which spans from Geelong to Wodonga on the NSW border.
The storm front is also forecast to produce damaging wind gusts of 90km/h and could rise above 100km/h in elevated areas.
The Bureau of Meteorology's Diana Eadie said unseasonably wet conditions over the past week had prompted a warning for minor to moderate flooding in the state's northeast.
"With this rainfall, we're more likely to see further riverine rises," the senior meteorologist told reporters on Thursday.
The damaging winds and heavy rain are expected to extend to Melbourne.
The heaviest falls are forecast for the city's east and south, while the north will face the worst gusts.
Victoria State Emergency Service deputy chief officer David Baker said there was potential for flash flooding across Melbourne.
"The simple message is: do not enter flooded waters," he said.
"Last Friday alone, our crews had to attend to three rescues when vehicles had entered waters."
Mr Baker is urging people to start preparing for the storm around their homes, with the soft soil and strong winds increasing the danger of falling trees.
"The next 48 to 72 hours will prove challenging for Victorians," he said.
