Issued 7th August 2019. The weather is about to turn pretty wild and nasty across large parts of South Australia including Adelaide. A weak low is bringing some rain today but tomorrow a powerful cold front will open the proceedings for 3 days worth of severe weather. An incredibly cold polar airmass will arrive on Friday with snow being possible across the ranges in the South East. Above image showing the mid level polar airmass via GFS/BSCH
Rain, Storms, Hail & possible Snow: The best falls are expected across the Mt Lofty ranges due to orographic lifting with locally moderate to heavy falls possible and totals near 50mm likely. The Southern agricultural areas, Lower west coast, Central coast and South east coasts are forecast to receive 15-30mm from the system. Lighter falls of 5-15mm are forecast through the Northern agricultural areas. Showers with hail are likely across the South East of the state. Storms with hail are possible across the South East of the state.
The snow level is currently forecast at 900 meters which is just above most ranges in the South East… however when showers with hail occur they drag down the much colder air from aloft effectively lowering the snow level. Given this scenario the coldest airmass is forecast to arrive late Friday and last into Saturday. The highest chances for snow will be during this time along the highest ranges in the South East (Mt lofty). Showers will start off producing small hail at first then snow is possible for brief periods as the cold air comes down. Its definitely something worth keeping an eye on that the kids would love to experience. Below image rainfall forecast totals via windy.com
Wind: Damaging Westerly winds up to 110kmhr are forecast across the South East quarter of the state with the arrival of the cold front on Thursday afternoon. The initial front could produce raised dust across the state and a dust storm through the Murraylands, Riverland and North East districts. Winds will ease slightly on Friday but remain very strong and gusty during Friday and Saturday. Temperatures: COLD with a bitter wind chill of up to 10C so most places will have feels like temps in the single digits. Below image damaging winds on Thursday via Windy.com