We lay in a weather see-saw as the main zone of activity wandered across our skies from west to east and then reversed. This has placed Namibia on the western edge of an alto level anticyclone, The flow from approximately north to south meant a favourable importation of Congo air. This moist belt, as seen above Windhoek on Monday morning, can be more than 3000 feet thick. It is often evidenced by the thick white vapour trail behind airliner jets.With surface heating during the days, convection currents have by late afternoon generated accelerated development in and through this layer resulting in thundershowers within the rather narrow band of weather-friendly air. But useful rain fell from the escarpment area eastward.

The introduction of a layer of moist air, sufficient to contain alto-level clouds and with a depth in which sufficient vertical development could cause local showers was maintained. Not only maintained but also expanded as trough-line development, south of us, approached and pulled in more tropical moisture. There was sufficient activity to see isolated cumulonimbus cloud form and precipitate their excess moisture: rain. Although slight showers did fall at several places, Nabas, in the far southeast, had a 20mm fall. Central Katatura received a 13mm measure.
This pattern increased in its intensity as a major cold front arrived by Monday.
The clearance was suitably brief and the return of some upper air moisture was evident by mid-week.
The significance of all this is that such weather sequences smack of the La Nina weather expectations. The anticyclone pushing Monday's cold front tracked along almost 40oS and extended its ridge down to Antarctica: the resultant airflow has brought snow to the high Drakensberg.