Africa Wearther

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Update: Heavy rain and localised flooding is expected to continue in places over the eastern half of the country from Tuesday, 4 March 2014

 

 

As predicted last Friday (28 February 2014), large amounts of tropically-sourced moisture have been influencing the eastern parts of the country since Saturday, 1 March 2014, and the system is enhanced by a steep upper-trough currently over the extreme western parts of the country. This has resulted in large amounts of rainfall over the eastern parts of the country, with heavy rain (50mm or more in 24 hours) already reported in places over Gauteng, the extreme eastern parts of the North West Province  and in places over KwaZulu-Natal since Monday, 3 March.  Table 1 below shows the rainfall amounts at some of the stations that received more than 50mm over a 24 hour period, ending at 06:00 SAST on 4 March 2014.

Weather Station Rainfall  (mm)
Pretoria (Eendracht) 54.8
Pretoria (Bolepi house) 79.4
Pretoria (Irene) 65.0
Springs 52.8
Pilanesberg 64.6
Buffelspoort 79.6
New Castle 54.4
Mandini 72.4
Charters Creek 97.0
Cedara 54.0

Figure 1 below: The Day Natural Colours satellite image at 06:00 SAST, copyright EUMETSAT


This rainfall is expected to continue over the eastern parts of the country today, with widespread showers and thundershowers over Gauteng, the extreme eastern parts of the North West Province, Limpopo, Mpumalanga and in places over KwaZulu-Natal. The South African Weather Service has issued a warning for heavy rain leading to localised flooding over these provinces for today, continuing with a watch over Gauteng, Limpopo and Mpumalanga tomorrow.  Figure 1 below shows the satellite image of this morning, where this large amount of tropically-sourced moisture can be observed over the eastern half of the country.

The steep upper-trough is expected to move eastwards tomorrow, while the tropically-sourced airmass is expected to remain in circulation during the remainder of the week. Thus, further rainfall is expected in the east, with heavy rain and localised flooding expected to continue in places up until Thursday, after which the steep upper-trough is expected to dissipate. However, another steep upper- trough is expected to approach the country over the weekend, with heavy rain and localised flooding once again a possibility in places over the eastern parts of the country from Saturday, 8 March.

With this continuous rainfall and heavy rain in places, the risk of flash-flooding of the river systems remains very high. Communities living along riverine environments are thus encouraged to take extra precautions. Motorists are also urged to remain vigilant while driving under these wet conditions and avoid crossing low lying bridges, as they are prone to flooding.

The South African Weather Service will continue monitoring 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 can also be found at www.weathersa.co.za as well as via the SA Weather Service twitter account @SAWeatherServic

 

Compiled by: Christina Thaele, forecasters at Pretoria National Forecast Centre (NFC)

Edited by: Jacqueline Riet, Senior Forecaster at Pretoria National Forecast Centre (NFC)

For technical enquiries contact:

National Forecasting Centre

Tel: 012 367 6041

Media enquiries contact:

Ms Hannelee Doubell: Manager, External Communications

Tel: (012) 367 6104

Cell: 072 222 6305

E-mail: hannelee.doubell@weathersa.co.za

 

“Watching the weather to protect life and property”

 

 

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