A large high pressure system near New Zealand continues to direct a hot and humid northeasterly airstream over Victoria. A trough of low pressure crossing the Bight will reach western Victoria late today then become slow moving. A low pressure system will develop on the trough over northwestern Victoria on Friday then drift slowly southeastwards over the weekend. Milder, less humid southerly winds will develop behind the low, as a new high pressure system forms in the Bight.
HEAVY RAIN and SCATTERED THUNDERSTORMS which may lead to FLASH FLOODING are likely to develop in the far west during TONIGHT before extending across the remaining parts of the State during FRIDAY. The heavy rain and thunderstorm activity will continue on SATURDAY.
Three day totals of around 100-200mm are expected acoss most of northern and central regions of the State. Elsewhere totals are likely to be between 30 and 100mm. Over the northeast ranges totals may exceed 250mm.
Locations which may be affected include Mildura, Horsham, Warrnambool, Bendigo, Shepparton, Seymour, Maryborough, Ballarat, Geelong, Melbourne, Wodonga, Wangaratta, Traralgon and Bairnsdale.
The State Emergency Service advises that people should:
* Don't walk, ride or drive through flood water;
* Keep clear of creeks and storm drains;
* Be aware that in fire affected areas, rainfall run-off into waterways may contain debris such as ash, soil, trees and rocks;
* Be alert that in areas recently affected by fires, heavy rainfall increases the potential for landslides and debris across roads.