South Africa's South African Weather Service has rolled out a series of yellow-level warnings for Tuesday, 15 September, as disruptive rain, severe thunderstorms and damaging winds hit several provinces at once. For anyone travelling in the country this week, it's worth knowing where the rough weather is concentrated.

The most serious alert — a yellow level 4 warning for disruptive rain — covers eastern Namakwa in the Northern Cape and the Central Karoo District of the Western Cape. SAWS warns of possible flooding of roads and settlements and major traffic disruptions, which matters if you're driving the long, remote routes through the Karoo. Lower-level thunderstorm warnings apply across both provinces too: a level 2 for severe storms and excessive lightning in parts of the Northern and Western Cape, and a level 1 for the northeastern coast and adjacent interior of the Eastern Cape.

Damaging winds are forecast for parts of the North West, Northern Cape, Free State, Limpopo and Eastern Cape, while KwaZulu-Natal is under a level 2 warning for damaging winds and waves — a heads-up for anyone planning beach time or boat trips on the KZN coast. Rough seas are possible along the western and southern coastline, and the Cape provinces are expected to take some of the worst of it, with heavy downpours, hail, lightning and strong winds all in the mix.

Further inland and north, conditions look milder. Gauteng should be partly cloudy and warm with isolated showers and thundershowers, while Mpumalanga and Limpopo face cloudy spells, morning drizzle and fog along the escarpment, plus scattered showers. One separate concern: SAWS has flagged extremely high fire danger in parts of Limpopo, so open flames and campfires are a bad idea there.

The outlook beyond Tuesday isn't much calmer. The extended forecast for Thursday and Friday (17-18 September) points to showers and thundershowers in places, widespread in the southeast, with cold to very cold conditions in the west.

SAWS cautions that the severe weather could damage informal settlements, temporary structures and infrastructure, and cause power and communication disruptions. Practical takeaways for travellers: build extra time into any road journeys through the Northern and Western Cape, check road conditions before heading into the Karoo or along the Garden Route, expect delays or cancellations on coastal and adventure activities in KwaZulu-Natal, and pack proper wet-weather layers — spring in South Africa is living up to its volatile reputation this week. If you're driving at night, watch for flooded low-water bridges and standing water on minor roads; if you're hiking or camping, reconsider exposed routes until the warnings lapse.