A low-pressure system is forecast to bring cold and wet weather to Cape Provinces from Sunday through to Tuesday, the South African Weather Service said.
It is predicted that a cut-off low-pressure system will develop along the coast of Namibia on Sunday, moving over the Northern Cape on Tuesday.
Cut-off lows are also associated with extensive atmospheric instability, which can lead to extended periods of rain.
“From Monday onwards, showers and thundershowers are predicted over sections of the Cape provinces, with cold daytime temperatures and windy conditions, before moving to parts of the Free State and the North West on Tuesday night and Wednesday.”
The expected intensity and movement of the cut-off low in the preceding part of the week is currently disagreeing with numerical model information, and SAWS will continue to monitor this weather system and keep the public up to speed on alerts and information.
Despite its rarity, we can expect rain of between 20 to 35 mm over parts of the North West, Free State, and Northern Cape over the next 24 hours. The rain should begin on Monday in the Northern Cape, then spread to the Free State and North West on Tuesday.
From Monday, strong gusty winds of 50 km/h can be expected in these areas.
The weather service said snowfalls are likely to be confined to the Drakensberg regions and Lesotho on Wednesday, before spreading to the high-lying areas of the Western and Eastern Cape on Thursday.