Issued 1st August 2017. A big Winter Low is forecast to run over the top of South Australia on Wednesday! The wild weather which hit Perth and South West WA on Monday is making it way across Southern WA towards South Australia. The first impacts are likely to be felt through SA’s Western districts on Tuesday afternoon and evening with strong gusty Northerly winds to 50 km/h turning stronger Westerly to 80 km/h. Due to the very dry conditions raised dust or dust storms will be possible.
The low’s center is forecast to cross the coast near Ceduna on Wednesday while the front continues marching East across the rest of the state. Warm gusty North East winds will increase ahead of the trough and low before shifting much cooler South Westerly behind it. Scattered showers, rain areas and isolated storms with hail are likely across the Southern half of the state on Wednesday. This activity is expected to reach Adelaide and the South East quarter of the state during Wednesday evening while continuing early Thursday.
Rainfall totals of at least 10 to 25mm should occur from this system along the Southern Coast and across the South East quarter with lighter falls up to 10mm through remaining inland parts.
The low will then slowly move East during Thursday with scattered showers and rain areas early in the South East easing to isolated showers later in the day.
A series of strong cold fronts are forecast from Friday to Sunday which will bring another round of scattered showers, rain areas, isolated storms with hail and strong winds to the Southern Coast and South East parts of the state including Adelaide across the weekend.
By the end of the weekend, it is hoped that large parts of South East quarter and agricultural districts will pick up at least 25mm with isolated falls up to 50mm. Adelaide metro and Mt Lofty areas could end up with totals between 50 and 80mm. Unfortunately for the North West and North East pastoral districts very little rain is expected. Above image: 6 day rainfall forecast via Windy. Blue = 10 to 25mm, yellow = 25 to 50mm.