"Cape Doctor" is the local name for the strong, often persistent and dry south-easterly wind that blows on the South African coast from spring to late summer (September to March in the southern hemisphere).
However, if the South-Easter is accompanied by a cut-off low as occasionally happens in the spring and autumn months, this can cause heavy rains to fall over the Western Cape.
The Laingsburg flood of January 1981 was caused by heavy rains as part of a Black South Easter.
This could be because the north-westerly winds are usually accompanied by rain, which can fall for days.
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