The Bureau of Meteorology has issued a severe weather warning for Victoria and New South Wales.
Victorian State Emergency Service has also issued a Flood Watch for the Upper Murray and Mitta Mitta Rivers, Kiewa River, Ovens and King Rivers, Broken River, Broken Creek, Seven and Castle Creeks and Goulburn River.
Significant and widespread flooding is likely across most of Victoria from Friday onwards.
Heavy rain and scattered thunderstorms are likely to develop in the far west during Thursday night into Friday before extending across the remaining parts of the State during Friday.
The heavy rain and thunderstorm activity will continue on Saturday and Sunday.
Three day totals of around 100-200 mm are expected across most of northern and central regions of the State. Elsewhere totals are likely to be between 30 and 100 mm.
The highest totals are expected over the northeast ranges, where three day totals may exceed 250 mm.
For Flood information:
For river heights go to www.bom.gov.au or phone 1300 659 217.
For urgent animal welfare issues phone Agriculture Victoria on 136 186 or your local vet.
Emergency contacts: For life threatening emergencies phone Triple Zero (000).
For flood and storm emergency assistance from the SES phone 132 500.
For more details go to http://emergency.vic.gov.au/respond/#!/warning/2344/moreinfo