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After months of inactive weather over most of South Africa, especially the summer rainfall areas, there are some changes on the way…

Cooler temperatures as well as showers and thundershowers, are expected over the south-eastern and eastern parts of the country on Thursday and Friday.

On Wednesday, a cold front passed over the southern parts of the country, closely followed by a ridge of high pressure, which is causing an on-shore flow, resulting in cloudy and rainy conditions.

The South African Weather Service is also monitoring the development of a steep upper  trough currently positioned west of the country, which is expected to make landfall overnight.

On Thursday, combination of the upper trough and the surface high will result in increased chances of rain over the eastern half of the Eastern Cape as well as KwaZulu-Natal (Fig. 1).

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Midweek SNOW update: Change in data sees delay in snowfall

Significant rainfalls ahead

There are expectations of significant falls of rain along the country’s eastern belt, with the possibility of heavy rain in places along the Eastern Cape’s eastern portion of the coast, as well as the southern KwaZulu-Natal coast. These will result in isolated cases of flash flooding.

Isolated thundershowers are also expected over the Free State and Mpumalanga provinces. There is also a chance of a few showers over Gauteng during late Thursday or early Friday morning. Further thundershowers can be expected on Friday over KwaZulu-Natal and eastern Mpumalanga.

Figure 1: Unified model output showing total accumulating rainfall expected on Thursday 5 September

 

Cold conditions are expected over the southern and south-eastern parts on Thursday (Fig. 2), spreading north-eastwards and reaching Gauteng and Limpopo Provinces on Friday (Fig. 3). Light snowfalls are expected over the southern Drakensberg from Thursday night.

Figure 2: Forecasted maximum temperatures for Thursday 5 September

 

Figure 3: Forecasted maximum temperatures for Friday 6 September

 

The South African Weather Service will continue to monitor any further developments relating to this weather system and will issue subsequent updates as required. Furthermore, the public is urged to regularly follow weather forecasts on television and radio.

Updated information in this regard will regularly be available at www.weathersa.co.za as well as via the SA Weather Service Twitter account @SAWeatherServic

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Click HERE for a 10-day forecast for your city…

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