A developing low pressure system has triggered showers and storms across four states and territories. On Friday night a trough swept over South Australia, bringing showers and storms to eastern parts of the state. The South East had the heaviest falls to 9am on Saturday with Cape Jaffa picking up 14mm which is their highest October fall in two years. Adelaide largely missed out with less than a millimetre falling. The trough and a developing low pressure system is continuing its trek eastward with showers and storms spreading into Victoria, the ACT and southern NSW. Edenhope in the Wimmera had Victoria's highest falls to 9am on Saturday with 11mm reaching the gauge. Hindmarsh in the ACT recorded 21mm. On Saturday the low will deepen and bring an increase in rainfall with the heaviest falls likely to be in Victoria's East Gippsland and the South Coast of NSW. Falls of 30-40mm are expected with isolated falls exceeding 50mm. The low will move offshore quickly on Sunday morning and allow showers to ease. However it will continue to drive dangerous swells into the coast.