We see these effects often here in the Cape, expecially when there are SW winds. The clouds are orographic--caused by the air being forced to rise when it encounters the terrain, then descending again on the other side. The rising air cools adiabatically, the moisture it contains condenses when the temperature reaches dew point, then the air warms again as it descends and the moisture evaporates again. Very funky cloud effects.
With the municipal elections coming up, there is also a lot more hot air around Table Mountain.