Impact Based Warning: Severe Thunderstorms

15 January 2022

Discussion: Showers and thundershowers are expected to develop over the interior of the Namakwa as well as the Central and Little Karoo from early afternoon, where some may become severe with quick and heavy downpours (30-40mm/hour) which can lead to flash flooding as well as possible large amounts of small hail (diameter of 2cm and less).

Impact: Localised flash flooding of susceptible roads, low-lying areas and bridges (main concern being the N1 and the Swartberg Pass) which can lead to difficult driving conditions especially where the roads are slippery due to the combination of hail and pooling of water on the roads and the heavy downpour that can reduce visibility. This may contribute to minor vehicle accidents and longer travel times. Localised damage to infrastructure and settlements (mainly informal) and localised and short term disruption to municipal and other essential services are also possible.

Instruction: If possible stay indoors away from metal objects. Do not seek shelter under trees or tall objects. Do not go fishing or play golf as both the golf clubs and fishing rods are good conductors of electricity. Be aware that any combination of hail, strong winds and/or heavy downpours can accompany the storms.

Legal notice:
“This warning from SA Weather Service must be communicated as received and may not be altered under any circumstance. It must be forwarded or communicated in its entirety and no portion hereof may be replicated or copied and distributed.”

SOUTH AFRICAN WEATHER SERVICE
Cape Town Weather Office
2nd Floor: Oval Office Park
Cape Town Int airport
Freight Road
Matroosfontein
Cape Town