Mixed bag for rain forecasts

Two experts share their opinion on what the coming rainy season holds.

08 October 2018 | Environment

Yanna Smith - When people hear the term El Niño, they tend to panic and see dry tumbleweed and dust devils, dying gardens and empty swimming pools, and farmers who suffer.

Predictions for this year's rainy season in Namibia have had many references to El Niño and concern has increased for yet another year of low or no rainfall.

Speaking to Windhoek Express, Professor Peet Pienaar, a retired academic and meteorologist from South Africa, said this season may not be outstanding, but added that it will be better than last year.

“If you could draw a parabola of the five-year cycles of drought and wet seasons, you will see that we are at the second level of emerging from drought now,” he said.

Not concerned at all with the ENSO (El Niño and La Niña) phenomenon, Pienaar insists that with copious snowfalls, great sardine runs and a long, extended winter, the outlook for rain is better this year than last year and he added that he is “not worried” at all about the season.



Second opinion

When asked whether it will be good or bad this year, well-known South African meteorologist and follower of the ENSO phenomenon Professor Kobus Botha, said, “yes and no”.

“El Niño developed very strongly but has weakened. We are a little unsure as to what it will do. For Namibia, you can prepare for below-average rainfall at this stage. The phenomenon has strengthened and weakened almost every day so we really do not know other than it will be below average,” he said.

The American National Oceanic and Atmospheric Administration (NOAA) predicts a relatively neutral El Niño with a 50 to 55% chance up until November, increasing to 65-70% during our summer.

“Overall, the oceanic and atmospheric conditions reflected ENSO-neutral,” the administration said.

“The forecasters also favour El Niño formation during spring and are leaning toward the more conservative model guidance that indicates a weak El Niño event.”

For a fully-fledged El Niño event, the requirement is a 0.5°C increase to hold consistently for three months. Currently, the period of April/May/June is at -0.1°C and the two periods for May/June/July and June/July/August are only at 0.1°C.

At the height of our drought in the 2015/16 season, measurements went up to 2.6°C. The El Niño phenomenon, at the start of 2015, was at 0.6°C. It grew and grew, and eventually began to decline by April 2016, standing at 1.7°C

The next ENSO diagnostics discussion is scheduled for 11 October 2018.

That being said, Namibia's dams are not in good shape, in particular for the east and central areas of the country. The total volume of the central area dams stands at a meagre 26.9% with Von Bach holding 22% of that. Last year this time, the central dams held 43.3%. In the east, Otjivero is at 7% and for the region, total volume is at 5.1% compared to 12.8% last year.

In the south, Naute is at 77% while Hardap has 37.4%, bringing the regions' total to 45.7% compared to 60.8% last year.

Also, the City of Windhoek has already implemented its contingency measures and other towns, including Okahandja and Gobabis, reliant on dams that are mostly close to empty, have been planning for borehole extraction.

Whichever of the predictions pan out, rainfall will most certainly be capricious. Let us hope that it rains in the catchment areas of our major dams, in particular, those of the central areas.



What to believe

According to Pienaar, the folklore surrounding whether or not it will rain, is mostly correct and based on scientific principles.

• The elders say when the snakes come out, the rain will come. This is correct as snakes respond to low pressure systems and are active during such a time. Rainfall can only come when there is a low-pressure system.

• Finches build their nests high or low. This is also correct. The higher the nests, the greater the chance of good rainfall.

• It never rains on full moon. This is correct. During full moon, the sea has higher swells due to the gravitational forces. This causes a mixing of the different layers of water and increases evaporation. It rains three or so days after full moon.

• Rain is coming when insects abound around lights. This is correct, as they too respond to low-pressure systems.

• If you own a tortoise, watch its behaviour. If it is constantly looking up for an extended period of time, rain will fall around three days later.

Similar News

 

Support for Omaheke conservancies

5 days ago - 14 July 2019 | Environment

The Namibia Nature Foundation (NNF) recently received a donation of N$234 000 to in support of three conservancies in the Omaheke region from First National...

Biotic weirdness and tobacco plantations

2 weeks ago - 30 June 2019 | Environment

The Namibia Scientific Society hosts to public talks next week.First on the agenda, is Prof Patricia Vickers-Rich who hosts a talk titled From Biotic Weirdness...

Namibia’s CCF wins UK grant

1 month - 16 June 2019 | Environment

The Cheetah Conservation Fund (CCF) announced that the United Kingdom’s Department for Environment Food & Rural Affairs (DEFRA) will fund its project to fight cheetah...

Paying for plastic

1 month - 09 June 2019 | Environment

Swakopmund • Erwin LeuschnerWhen it comes to consuming and taking control of disposable plastic bags in Namibia, the three towns along the central coast are...

International recognition for Sun Cyles

1 month - 26 May 2019 | Environment

Windhoek • Yolanda Nel The co-founder of Namibia's own Sun Cycles was awarded the National Energy Globe Award during SACREEE's first industrial energy efficiency conference...

Asbestos removal project under way

3 months ago - 15 April 2019 | Environment

Arandis • Leandrea Louw The Walvis Bay municipal council accepted a proposal by Adcon CC to rehabilitate the hazardous waste site and create more space...

'n Swartsak vol gemors bring hoop

3 months ago - 07 April 2019 | Environment

Windhoek • Yolanda Nel'n Uitstappie in Windhoek se middestad het een vrou aangespoor om 'n verskil te maak en nou hoop sy ander volg in...

A world ­without waste

3 months ago - 07 April 2019 | Environment

Windhoek • Yolanda Nel The invention of plastic changed the world in so many ways – for better and for worse – and it's...

Seeing the unseen

3 months ago - 24 March 2019 | Environment

Bank Windhoek, in conjunction with the University of Namibia (Unam) and Netherland’s Radboud University (RU) Nijmegen, host a scientific event titled ‘Building the Namibian Africa...

From cooking oil to biofuel

4 months ago - 10 March 2019 | Environment

Windhoek • Yolanda NelA bottle of cooking oil is heated up in the deep fryer to make the perfect, golden chicken nuggets. Once the oil...

Latest News

Two birds with one stone

5 days ago - 14 July 2019 | Events

On Wednesday (17 July) Colin Lindeque hosts a public talk on bush-to-feed for drought relief at the Namibia Scientific Society.Namibia currently faces two severe environmental...

Só maak Chamel 'n verskil

5 days ago - 14 July 2019 | Society

Gerine Hoff Daar is soveel mammas wat 'n behoefte het aan items vir hulle nuwe baba en dit eenvoudig nie kan bekostig nie. Om die...

Goeie opkoms vir Chryzander

5 days ago - 14 July 2019 | Local News

Gerine HoffDie gemeenskap van Rehoboth het verlede naweek kragte saamgesnoer om geld in te samel vir Chryzander Britz se ouers om hulle weer op hul...

Dams at critical levels

5 days ago - 14 July 2019 | Disasters

Windhoek • Elvira Hattingh Dams in Namibia only have 26.7% or 186 820 Mm³ (million cubic meters) of water available, compared to the same time...

'n Huis vol aapstreke

5 days ago - 14 July 2019 | People

Windhoek • Yolanda NelMet 'n behoefte aan mooi en unieke uitrustings vir kinders, teen 'n bekostigbare prys, het een mamma 'n entrepreneur geword toe sy...

Support for Omaheke conservancies

5 days ago - 14 July 2019 | Environment

The Namibia Nature Foundation (NNF) recently received a donation of N$234 000 to in support of three conservancies in the Omaheke region from First National...

Windhoek: A city for cyclists?

5 days ago - 14 July 2019 | Health

Windhoek • Lisa Plank There are no special routes for cyclists in Windhoek; cars drive carelessly, the area is mountainous and it is usually very...

Support for albinism

5 days ago - 14 July 2019 | Society

While commemorating International Albinism Awareness Day, FNB Namibia donated 250 sun protection hats valued at N$21 750 to Albino Care Support in Namibia of Albinism...

Ontluikende talent hier aangewakker

5 days ago - 14 July 2019 | Education

Altesame 160 leerlinge het in Junie aan die Bank Windhoek Skryfskool deelgeneem wat in samewerking met die ATKV Windhoek-tak aangebied is. Die skryfskool wat deur...

Load More