Thursday, Nov 27th

Last updateThu, 27 Nov 2014 11am

You are here: Home Weather Understanding Weather - not predicting -
DBN

More Bank Windhoek market cap

Investors appear to be making hay while the sun shines at Bank Windhoek Holdings. This week, trade in the shares of Bank...

Paladin looks east, raises Aussie $ 50 million

Paladin looks east, raises Aussie $ 50 million

An abrupt halt in trading this week on Paladin Energy stocks has resulted in the Australian based miner raising approxim...

Telecoms M&A to settle the market

Telecoms M&A to settle the market

Paratus Telecom announced this week it has bought Vox Telecom for an undisclosed amount to bring some consolidation to t...

Jazz captures the soul at Windhoek Festival

Jazz captures the soul at Windhoek Festival

It goes without saying that music really is a universal language uniting so many people who flocked to the Hage Geingob ...

Taxman loosens noose on farmers

In an effort to mitigate the effects of the severe drought experienced in 2013 the Ministry of Lands and Resettlement an...

Namibia guns for Renewables

Namibia has joined four other countries in the bid to host the proposed regional centre for the promotion of renewable e...

Understanding Weather - not predicting -

What happened?
This past week an unusual synoptic pattern has held sway across the southern hemisphere. A major anticyclone with core pressures well above 1030hPa straddled the Date Line (180o) in the south Pacific while on our side, a complex low pressure pattern covered most of southern Africa and the southern oceans.
Both high and low pressure systems have been static for this period. Static in position but active within themselves: anticyclonic strength ensured a consistent flow to maintain La Nina’s, positive oscillation, and dominance of global weather.
The complexities of the vortex areas see one core deepen, drift somewhat eastward while in the cold, unstable polar air behind it a secondary vortex quickly forms, weakening the older core, then the same cycle is repeated. The effect of this pattern maintained a zonal flow throughout the troposphere (surface to 40000 feet) above southern Africa.
The unusual feature is that these differing systems have held their geographical placing while whatever else may be on the weather map either by-passes or collapses while these two major systems remain.
The other unusual feature is the global situation on either side of globe: the high and the low. Again, the effect saw a limited, if not absent, eastern Atlantic anticyclone, and similarly an absence of the western Indian Ocean anticyclone.
This departure from the norm means there is no lower level moisture input from the Indian Ocean, so with no push from the east, the heat-low pressure belt across southern Africa remains static ensuring that over Namibia there has been an advection of bone dry southerly air. This limits daytime temperatures but with no anticyclonic thrust it cannot undercut the heat-low. Without convergence, there is no cumulus cloud and no rain!
The thin layer of cloud visible has too little moisture but its presence offers hope for improvement as November wears on.
What’s coming?
The vortex pattern persists. The weak South Atlantic anticyclone remains limited throughout the period and because there is little ability to ridge round the continent, any development of a cell away to the east is restricted. Any prospect of late Spring showers depends on the persistent heat-low generating an upward convective extension to tap the adjacent moister air mass gathering above much of Zambia, linking with the equally adjacent Congo air mass then to advect this combination into our Kavango area or further west.
Current outlooks show a mixed set of patterns across the northern mid-subcontinent. Much of the data available is based on satellite images showing cloud coverage and direction of movement. Other observational sources in that area are, largely, non-existent. This data provides the grist from which computer models are built. Otherwise, it is up to a weather observer to assess what is seen to be present and offer an outlook regarding what the current situation will be able to evolve. The heat factor is seen to be increasing and its effects, as outlined earlier, offer a prospect of showers into the new week. n the south west, temperatures will be considerably cooler with a fresh southwesterly wind as a result of the high ridging in from the south Atlantic.

Articles In This Category
Weather
 What happened? That the world’s weather patterns are at odds with themselves seems to be a common consensus. Primarily the cause is to be...
Weather
What happened? That the changing climate brings a range of varying aspects clustered under the same roof becomes more and more obvious, not only...
Weather
What happened? No rain of any significance so far and the outlook for much of the new calendar year is only bleak! But we have had rain, early and...
Weather
What happened? Weather headlines feature the northern hemisphere’s abnormal events while our southern world escapes  such headlines and their...
Weather
What happened? Anticyclonic control is to be expected within our airspace: generally clear, sunny skies are the hallmark  and this persisted for...
Weather
Weather
What happened? Yet again the previous weekend brought an active vortex pattern with a marked northerly extension. A low pressure trough with a cold...
Weather
What happened? The New Year’s greeting was accompanied by the percussion of thunder, the flash of lightning and the steady beat of myriad...
Related Articles
Weather
What happened? At an unusual time of the year we have seen, one way or the other, a departure from synoptic patterns prevalent across the southern...
Weather
 What happened? That the world’s weather patterns are at odds with themselves seems to be a common consensus. Primarily the cause is to be...
Weather
What happened? We have seen an interesting hiatus in the development of weather patterns variously around the world as year 2011 progressed. Seasons...
Weather
What happened? Summer begins with December. From one aspect at least, a start is made to summer as pressure patterns move toward a summery stance....
Weather
What happened? This week was marked by a cut-off low over the Orange River in the south and a broad trough of tropical moisture moving in from Angola...
Latest Articles
Headlines
Bongi, (left) second runner up in Sunday’s Idols SA finale and Proverb (middle) the Idols presenter, congratulating an elated Vincent B, this...
Headlines
The Ministry of Mines and Energy will accelerate the finalisation of its nuclear policy framework, a process that will lead to the final...
Headlines
Investors appear to be making hay while the sun shines at Bank Windhoek Holdings. This week, trade in the shares of Bank Windhoek has seen its market...
Editors Desk
A five-day sojourn to the wonderful winelands of the Western Cape is an invigorating trip. But as the author of “Undercover Economist” points out...
Weather
What Happened? The first signs that the high pressure control in the upper air over eastern Africa, is breaking up, start appearing on synoptic maps...
TransNamib’s turn around on track

TransNamib’s turn around on track

Thursday, 27 November 2014

Railway parastatal, TransNamib Holdings announced that it recently concluded a contract with Transnet Engineering that w...

Readmore

Arandis boasts of economic opportunities

Arandis boasts of economic opportunities

Thursday, 27 November 2014

Chief Executive Officer (CEO) of the Arandis Town Council, Florida Husselmann has said the town is Arandis is fast devel...

Readmore

MVA campaign gets further boost

MVA campaign gets further boost

Thursday, 27 November 2014

The 2014/2015 Festive Season Road Safety Campaign officially kicked off last weekend on 22 November 2014 to 15 January 2...

Readmore

Back to school logistics

Back to school logistics

Thursday, 27 November 2014

It’s the end of the year and Christmas is upon us. Children are home for the holidays, but already the parents are bei...

Readmore

Naspers rakes in

Thursday, 27 November 2014

Releasing its interim financial results for the six months ended 30 September 2014, Naspers reported that its core headl...

Readmore

SME Bank welcomed

Thursday, 27 November 2014

At a recent Banker Association of Namibia (BAN) meeting Ian Leyenaar, Chairman of BAN officially welcomed the SME Bank t...

Readmore

There is more to a glass of wine than to a cup of coffee

Thursday, 27 November 2014

A five-day sojourn to the wonderful winelands of the Western Cape is an invigorating trip. But as the author of “Under...

Readmore

The central bank wails but credit remains easy

Friday, 21 November 2014

It is not typical for a business editor to advise readers not to overspend but this is exactly what I want to do.
One of ...

Readmore

Offbeat 28 November 2014

Offbeat 28 November 2014

Thursday, 27 November 2014

To my mind, the consensus of a high number of voters is far better than low single-digit majorities.

A social system is v...

Readmore

Innovation is about change

Innovation is about change

Friday, 21 November 2014

In the previous column I looked at the circumstances under which it is better to stop or prevent an innovation project, ...

Readmore

Every bag contributes to social support

Thursday, 27 November 2014

The corporate social investment vehicle of Ohorongo Cement, the Ohorongo Otavi Community Trust announced last week it ha...

Readmore

Charities collaborate to improve livelihoods

Charities collaborate to improve livelihoods

Thursday, 27 November 2014

The Women at Work Training Centre situated in Olympia, Windhoek, last week handed over towels to the Beautiful Kidz Anus...

Readmore

It is worth asking?

It is worth asking?

Thursday, 27 November 2014

In this present context Namibia is a very interesting place to be in. The contentious Kudu Gas project which may well co...

Readmore

Identity, a very important aspect to have

Identity, a very important aspect to have

Friday, 21 November 2014

The moment that you are born, it is critical to be identified as an individual. That is why your parents give you a name...

Readmore

Film  Review - Lucy

Film Review - Lucy

Thursday, 27 November 2014

Director: Luc Besson
Screenplay:Luc Besson
Cast: Scarlett Johannson, Morgan Freeman, Min-sik Choi, Amr Waked
Genre: Thrille...

Readmore

Jahohora and First Day

Jahohora and First Day

Thursday, 27 November 2014

New Namibian children’s book presented.

Following the success of Mama Namibia, author Mari Serebrov (adoptive daughter ...

Readmore

Mixed Martial Arts gets green light

Mixed Martial Arts gets green light

Thursday, 27 November 2014

Mixed Martial Arts (MMA) has officially been recognised as a Namibian Sports Code by the Namibian Sports Commission (NSC...

Readmore

Tips ahead of Desert Dash

Tips ahead of Desert Dash

Thursday, 27 November 2014

The 2014 FNB Desert Dash will start in Windhoek on 12 December and winds down in Swakopmund. Last year’s winners, Dion...

Readmore

28 November 2014

Thursday, 27 November 2014

What Happened?
The first signs that the high pressure control in the upper air over eastern Africa, is breaking up, start...

Readmore

 21 November 2014

21 November 2014

Friday, 21 November 2014

What Happened?
High pressure control on the surface as well as in the upper layers, remains the order of the day.
The weat...

Readmore

New FNB HQ up for Green Star

Thursday, 27 November 2014

The FNB Freedom Plaza is well on its way to be certified under the Green Star SA Office v1 Rating system, according to G...

Readmore

Cheetah queen chairs large carnivore protectors

Cheetah queen chairs large carnivore protectors

Thursday, 27 November 2014

Newly-elected chairperson of the Large Carnivore Management Association of Namibia (LCMAN), Dr Laurie Marker, steps into...

Readmore

Draft power makes all the difference

Draft power makes all the difference

Thursday, 27 November 2014

Agricultural financing agency, Kongalend, last week handed over a total of 18 tractors complete with rippers, worth over...

Readmore

Agra staff charity project reaches out

Agra staff charity project reaches out

Thursday, 27 November 2014

Agra staff members hosted a Christmas party for children of the Maria Pre-primary School from Havana, Katutura a fort-ni...

Readmore

MTI calls for more investment into research

Thursday, 27 November 2014

The Ministry of Trade and Industry last week called for private sector as well as the public sector to invest into resea...

Readmore

St. Paul’s College supports community

St. Paul’s College supports community

Thursday, 27 November 2014

St. Paul’s College was recently crowned the winner of the Recycle Namibia Forum’s (RNF) ‘Schools Recycling Competi...

Readmore

Nacoma helps Khorixas open Kunene gate

Nacoma helps Khorixas open Kunene gate

Thursday, 27 November 2014

The Namibian Coast Conservation and Management (NACOMA) Project handed over the Khorixas Cultural Heritage and Interpret...

Readmore

Buying an accommodation business

Buying an accommodation business

Thursday, 27 November 2014

There is a lot of research that must be done before you buy an accommodation establishment. There are the obvious physic...

Readmore

Goodwill Society, Prosperity’s conscience

Goodwill Society, Prosperity’s conscience

Thursday, 27 November 2014

With close to 100,000 beneficiaries and having a successful business spanning more than 20 years, Prosperity Group embar...

Readmore

Save your own skin

Save your own skin

Friday, 21 November 2014

Standard Bank Namibia handed over N$120,000 to the Cancer Association of Namibia, on Tuesday for the purpose of raising ...

Readmore

Kudu to go ahead despite Tullow exit

Thursday, 27 November 2014

The contentious Kudu Gas project is advancing well despite strategic partner Tullow’s reluctance to participate in the...

Readmore

Paladin placement raises stir

Thursday, 27 November 2014

Canadian investors are up in arms following Paladin Energy’s placement programme in which a Singaporean entity Hubo Cl...

Readmore

Schoolwear retail outlet opens its doors

Friday, 21 November 2014

Namibia’s manufacturing capacity to participate in distribution and retailing needs to be accelerated to deliver equit...

Readmore

Retail Charter development enters next round

Retail Charter development enters next round

Friday, 07 November 2014

The Namibian Retail Sector Charter development entered the next round when the Namibia Trade Forum (NTF) announced the a...

Readmore

Standard Bank re-appoints Leon Koch

Standard Bank re-appoints Leon Koch

Thursday, 27 November 2014

Standard Bank Namibia announced the recent re-appointment of Leon Koch as Head Business Banking within the Personal and ...

Readmore

Rosh Pinah’s Iron Lady

Rosh Pinah’s Iron Lady

Thursday, 27 November 2014

A special woman who works at a small branch of a large bank, has been chosen as the Number One female member of her comm...

Readmore

Action Coach