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Weather 07 October 2016

What Happened
A low pressure system with a well-defined vortex just south of Madagascar presented itself at the beginning of the week as the main synoptic feature. Alas that was not to be as it fizzled out over two days becoming a subdued area of lower pressure in the western wing of the southern Indian high pressure cell.
As always, the main contender proved to be the South Atlantic high and this week was no exception. While most of the sub-continent registered low pressure conditions due to solar irradiation, the south-western corner started to feel the impact of the approaching South Atlantic high by Wednesday night. A surprisingly cool Thursday morning was the result felt on the surface. The cooling covered about two thirds of Namibia with only the Okavango, Babwatwa and Zambezi remaining under the influence of the heat-low, thus still very hot.
By Thursday the low pressure vortex south of Madagascar has collapsed, merging into the broad lower pressure band ahead of the approaching South Atlantic high. Although the vortex was of brief duration, two days at most, it did contribute to relieve the high pressure control over eastern Africa, a major obstacle for moisture to migrate from the Indian Ocean to central Africa.
High pressure systems are by nature descending whether they are on the surface or in the higher levels of the atmosphere. Even though surface temperatures under the control of a high pressure cell may often become very hot due to diabatic compression, the overall vertical motion is negative, i.e. descending towards the earth. This prevents convection, thus preventing cloud formation. It is only when the upper air high pressure control is fractured by a strong vortex (low pressure) that positive conditions develop for convection. This is what typically happens over eastern Africa in the transition from winter to summer, when the atmosphere increases in depth, the 500 mB dam line moves vertically to a higher level, and the locomotive that drives the southern African summer rain, gains in strength.
This week’s vortex and its upper level impact over the southern half of eastern Africa, is a precursor to similar but stronger repeats of the same phenomenon. However, the moisture conveyor will only function optimally once the high pressure ridge over eastern Africa is gone and the upper airflow resumes a strong east to west zonal flow. That is not yet the case.
What’s Coming
The core of the next South Atlantic high approaches the west coast over the weekend bringing another round of cool night temperatures to the southern Namib and the Karas region. Saturday night will be markedly cooler in the Keetmanshoop and Karasburg districts but the temperatures should not go below 10°C.
The system moves rapidly to the east, and in a weird twist of events, the leading forecasts expect the South Atlantic high to collapse during Sunday, very similar to what happened to the vortex this week. By Monday, the remnant of the former South Atlantic high sits over South Africa, extending its signature ridge over Botswana and the eastern half of Namibia. Its impact will be minimal, though and by Monday night, lower pressure conditions originating from central Africa will cover two thirds of Namibia, bringing windy conditions, especially at night, and very hot afternoons.
By Wednesday next week, the next South Atlantic high approaches, causing a marked pressure differential between the interior and the coastal plain which should lead to windy conditions over the southern Namib. Ahead of this system a convergence zone runs from southern Angola, across the north-eastern quadrant of Namibia and into Botswana. East of the convergence line, convection will be enhanced and there is a good possibility of light rain over the central north, the Kavango, Bushmanland, Hereroland East and the northern half of the Gobabis district. This system will move to the east, taking the rainfall prospects to Babwatwa and the Zambezi.

About The Author


In Memoriam. The weekly weather column is maintained in honour of the legacy of John Olszewski, the widely respected and well-known weatherman of Namibia. After writing the weather column for more than twelve years, he has left an indelible mark at the Economist, and the technical ability among the editorial staff to "read" the maps that he used so often. - Ed.

Following reverse listing, public can now acquire shareholding in Paratus Namibia


20 February 2020, Windhoek, Namibia: Paratus Namibia Holdings (PNH) was founded as Nimbus Infrastructure Limited (“Nimbus”), Namibia’s first Capital Pool Company listed on the Namibian Stock Exchange (“NSX”).

Although targeting an initial capital raising of N$300 million, Nimbus nonetheless managed to secure funding to the value of N$98 million through its CPC listing. With a mandate to invest in ICT infrastructure in sub-Sahara Africa, it concluded management agreements with financial partner Cirrus and technology partner, Paratus Telecommunications (Pty) Ltd (“Paratus Namibia”).

Paratus Namibia Managing Director, Andrew Hall

Its first investment was placed in Paratus Namibia, a fully licensed communications operator in Namibia under regulation of the Communications Regulatory Authority of Namibia (CRAN). Nimbus has since been able to increase its capital asset base to close to N$500 million over the past two years.

In order to streamline further investment and to avoid duplicating potential ICT projects in the market between Nimbus and Paratus Namibia, it was decided to consolidate the operations.

Publishing various circulars to shareholders, Nimbus took up a 100% shareholding stake in Paratus Namibia in 2019 and proceeded to apply to have its name changed to Paratus Namibia Holdings with a consolidated board structure to ensure streamlined operations between the capital holdings and the operational arm of the business.

This transaction was approved by the Competitions Commission as well as CRAN, following all the relevant regulatory approvals as well as the necessary requirements in terms of corporate governance structures.

Paratus Namibia has evolved as a fully comprehensive communications operator in Namibia and operates as the head office of the Paratus Group in Africa. Paratus has established a pan-African footprint with operations in six African countries, being: Angola, Botswana, Mozambique, Namibia, South Africa and Zambia.

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PNH as a fully-listed entity on the NSX, is therefore now the 100% shareholder of Paratus Namibia thereby becoming a public company. PNH is ready to invest in the future of the ICT environment in Namibia. The public is therefore invited and welcome to acquire shares in Paratus Namibia Holdings by speaking to a local stockbroker registered with the NSX. The future is bright, and the opportunities are endless.