Johannesburg – The South African Weather Service (SAWS) has warned of two winter systems that will affect the country from Thursday, with their impact extending into the weekend.
“Firstly, an intense cold front will make landfall in the Western Cape early Thursday morning spreading to the Eastern Cape during the afternoon as well as parts of KwaZulu-Natal in the evening. Rainy and very cold conditions with snow on the high-lying areas will set in over the Western Cape from Thursday, progressing eastwards during the day,” SAWS said.
“Snowfall is expected over the eastern high-lying areas of the Western Cape, spreading to the high-lying areas of the Eastern Cape from the afternoon into the evening, persisting into Friday where some areas could experience traffic disruptions to some roads and mountain passes.
“Furthermore, snowfall is also expected to spread to the Drakensberg regions of KwaZulu-Natal from Thursday night onwards. The good news is that weather conditions will generally start to improve over the Western Cape during Friday, while cold conditions can be expected to arrive over parts of Mpumalanga and southern Gauteng on this day,” SAWS said.
A second weather system, a cut-off low-pressure system (an upper-air low-pressure system displaced northwards and isolated from the original westerly wave regime), will develop during Friday over the western interior of the country.
“As a result, windy and cold conditions will prevail across most parts of the country during Friday and Saturday. Showers and thundershowers will develop in association with the cut-off low, affecting the eastern parts of the Northern Cape, Free State as well as the northern and eastern parts of the Eastern Cape.
“Rainfall of 30 to 40mm can be expected over the extreme eastern parts of the Northern Cape, the south-western parts of the Free State and the extreme northern interior of the Eastern Cape, where very cold conditions will persist,” it said.
Due to the dynamics of the upper-air system (characterised by very cold, unstable air aloft), some of the thunderstorms may become severe, resulting in large amounts of small hail.
“Snowfall is likely to continue over the northern high-lying areas of the Eastern Cape, Drakensberg Mountains (encompassing the Eastern Cape and KwaZulu-Natal) and the extreme eastern parts of Free State, while light snowfall can be expected over the southern Free State and south-eastern Northern Cape.
“Last-mentioned snowfalls may result in further disruptions to traffic on major routes as well as the possible closure of mountain passes. In order to mitigate unexpected stock losses, it is strongly recommended that stock farmers move their smaller livestock to shelter at an early stage, ahead of the arrival of the winter weather,” SAWS said.
The cut-off low-pressure system is expected to exit the country during Sunday afternoon, allowing a spell of more settled, warmer weather to return during the following week.
–SAnews.gov.za
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