Slow-moving thunderstorms are predicted to dump hail and heavy rainfall on Melbourne.
The storms on Thursday afternoon are not expected to be as intense as one last week that brought flash flooding to Melbourne suburbs.
But hail and isolated falls of up to 50 millimetres are predicted.
The Bureau of Meteorology's Stephen King says anyone caught out in the storms could cop of a lot of rain in a relatively short period of time.
"The storms are very unstable, which means they get much, much higher in the atmosphere and are much more conducive to large hail developing," he said.
Mr King said the storms are likely to develop in the northern suburbs.
The forecast comes after a lightning strike caused multiple track faults and train delays on the Bendigo line.
A severe thunderstorm warning for northwest Victoria has been cancelled.