Cape Town LEVEL 2 weather warning

View of Lagoon Beach, Cape Town on a stormy day. Photo: Storm Simpson.

LEVEL 2 weather warning: Thunderstorms, dangerous waves and 80km/h winds in Western Cape over weekend

An intense weather system is expected to bring widespread showers and thundershowers to the Western Cape from Friday to Saturday.

Cape Town LEVEL 2 weather warning

View of Lagoon Beach, Cape Town on a stormy day. Photo: Storm Simpson.

The South African Weather Service (SAWS) issued an update on the weather conditions in the Western Cape and an additional pair of weather warnings on Friday, 26 November. The forecaster has issued numerous warnings in the province recently – a rare Level 8 alert was issued in Cape Town on Thursday.

LEVEL 2 WEATHER WARNING

The weather service issued two Yellow Level 2 warnings on Friday – one for thunderstorms and one for waves.

The thunderstorms warning is valid from 11:00 on Friday until 10:00 on Saturday and the waves warning kicked in at midnight on Friday and is expected to last until 8:00 on Saturday.

Thunderstorms

An intense weather system is expected to bring widespread showers and thundershowers to the Western Cape and the southern parts of Namakwa on Friday, before moving over the south-eastern interior of the Cape Winelands, northern Overberg, Central Karoo and Garden Route on Saturday morning.

“Some of these storms may be severe, leading to periods of heavy downpours associated with rainfall accumulations of 15 to 30mm, and strong and gusty winds as well as large amount of hail (1 to 2 centimetres in diameter),” said SAWS.

The areas affected by thunderstorms. Graphic: SAWS

Potential impacts include:

  • Localised and flash floods on susceptible roads, low-lying areas and bridge due to heavy downpours.
  • Slippery roads due to large amounts of hail, which can contribute to vehicle accidents.
  • Localised damaged to infrastructure and settlements due to gusty winds.
  • Localised and short-term disruption to essential services.

Waves

Wave heights are expected to reach 4,0 to 5,0 metres, along the coast, between Table Bay and Plettenberg on Friday.

The weather service said the waves will likely subside overnight from the west, however, they will remain high between Cape Agulhas and Plettenberg Bay on Saturday morning.

“These wave heights are expected to coincide with strong to gale force (up to 80km/h) south-easterly winds [on Friday], short wave periods (6 to 8 seconds) and a dominating south-easterly swell posing problems at sea and exposed bays of the aforementioned coastal strip,” said SAWS.

The areas affected by waves. Graphic: SAWS.

Potential impacts include:

  • Disruptions of small harbours or ports in the affected areas.
  • Small vessels and water craft having difficulty navigating the sea and the risk of taking on water and capsizing.