Rainfall

Namibia is a rather arid country. Furthermore the rainfall tends to vary a great deal from one year to the next. Please refer to the Climate/Rainfall part of the Digital Atlas of Namibia by clicking here. According to this the rainfall on Farm Kyffhäuser is between 150mm and 200mm per year and the variation in annual rainfall is between 50% and 60%.

The rainfall measurements for Farm Kyffhäuser are taken at the main house. Click here to see the measured annual rainfall for Farm Kyffhäuser since 1994. Click here to see the measured seasonal rainfall for Farm Kyffhäuser since 1993/94. Since Farm Kyffhäuser lies in a summer rainfall area, the seasonal rainfall is measured from July of a given year to June of the next year.

The average rainfall has indeed been found to be between 150mm and 200mm per annum. See the variation in the average seasonal rainfall and the 3-year average seasonal rainfall here.
The three year averaged rainfall per season measured on the farm has dropped below 100mm per season in 2020 for the first time since 1996.
Seven years with rainfall of less than 100mm per year have been recorded, i.e. 1994, 1996, 2004, 2007, 2016, 2019 and 2020.
Only 36mm of rainfall was recorded in the 2012/13 season. This was the lowest seasonal rainfall since our measurements started on the farm in 1994.
Only 37mm of rainfall was recorded in 2019. The rainfall for the main rain months of Jan-Mar 2019 was 0mm. The total rainfall for the first half of 2019 was 3mm.
The highest recorded rainfall was 500mm for the 2008 calender year. Of this rainfall, a total of 375mm was recorded between January and May and a total of 125mm was measured in November and December.

The three months of January, February and March are the main rainfall months as seen here. Approximately 64% of the annual seasonal rainfall is measured in these months.

Click here to see the measured seasonal rainfall for Farm Kyffhäuser since 1993/94 plotted against the El Niño SST (sea surface temperature) Anomaly. The El Niño SST Anomaly is the difference between the sea water surface temperature in the Pacific Ocean and the mean sea water surface temperature in the same area. When the SST Anomaly is greater or equal to 0.5°C it is referred to as an El Niño condition. When the SST Anomaly is less or equal to -0.5°C it is referred to as a La Niña condition. During El Niño conditions it can be seen that the rainfall is below average on Kyffhäuser and during La Niña conditions the rainfall on Kyffhäuser is above average.

The following two images show the predicted precipitation rates and cloud cover for Southern Africa for the next 24 hours courtesy of Kevin Levey of 1stweather.com and customweather.com.

Predicted precipitation rates
  Predicted cloud cover
Precipitation rate Position of Kyffhäuser
Cloud cover Position of Kyffhäuser
copyright customweather.com   copyright customweather.com
 

Weather related links

Measured information / Satellite photos
Namibia Weather Network
Namibrand weather data
Kobus Botha Weather Photos
Kobus Botha Weather Photos - Hourly Rain
AfriWX Multi-Sensor Precipitation Estimate
AfriWX Multi-Sensor Precipitation Estimate Animation
AfriWX Satellite Image - Cloud Cover
AfriWX Satellite Image - Natural Colour
Meteologix - Satellite derived preciptation totals (historical data)
Meteologix Satellite Image - Natural Colour

Predicted weather
AfriWX 4 Day Rainfall Outlook (GFS)
AfriWX Daily Rainfall Probability Forecast with 4 Day Look Ahead (GEFS)
AfriWX Daily Rainfall Probability Forecast with 7 Day Look Ahead (GFS)
Meteoblue - Southern Namibia - Clouds and 3hr Precipitation (NEMS)
Meteoblue (Beta) - Southern Namibia - Clouds and Precipitation (ICON / NEMS / GFS)
Meteoblue (Beta) - Southern Namibia - Monthly Precipitation Anomaly (Various models)
Ventusky - Southern Africa rainfall (GFS / GEM / ICON)
Windy Community (ECMWF / GFS / ICON)
Meteologix - Namibia rainfall (EZ(ECMWF) / GFS / ICON / ACCESS-G)
WXMAPS.ORG - GFS medium range forecasts of precipitation for Africa (GFS)
WXMAPS.ORG - 10-day precipitation outlook for Africa (GFS)
yr.no (Norwegian weather service) - Kyffhäuser precipitation
yr.no (Norwegian weather service) - Zebra River precipitation
yr.no (Norwegian weather service) - Nudaus precipitation
yr.no (Norwegian weather service) - Neuras precipitation
yr.no (Norwegian weather service) - Harughas precipitation
yr.no (Norwegian weather service) - Urikos precipitation
yr.no (Norwegian weather service) - Neu Onis precipitation
yr.no (Norwegian weather service) - Büllsport precipitation
yr.no (Norwegian weather service) - Maltahöhe precipitation
yr.no (Norwegian weather service) - Mariental precipitation

Numerical weather prediction (NWP) models (more info)
ACCESS-G (UM) - Australian Community Climate and Earth-System Simulator (Australian)
ECMWF or IFS - European Center for Medium-Range Weather Forecast model (European)
GDAPS (UM) - Global Data Assimilation Prediction System (Korean)
GEM - Global Environmental Multiscale model (Canadian)
GEFS - Global Ensemble Forecast System model
GFS - Global Forecast System model (American)
ICON - Icosahedral Nonhydrostatic model (German)
NEMS - NOAA Environmental Modeling System
UM - Unified Model (UK)
Ensemble forecasting

Other info
El Niño/Southern Oscillation (ENSO) - Technical Discussion (NCEI website)
El Niño/Southern Oscillation (ENSO) - Historical data
Vegetation index deviation maps by Namibia Rangelands
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Last updated on 10 Feb 2021
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