World

Africa



What are the sources for WeatherOnline forecasts?


The WeatherOnline forecasts are created by using a MOS system developed in-house with the most current US weather services model data (GFS). The statistical methods of the Model-Output-Statistic (MOS)-System were developed in cooperation with the Meteorological Department of the University of Bonn.

What is a MOS-System?


A Model-Output-Statistic (MOS)-System combines the data of the weather forecast model and the locally recorded data for any given point by transforming the model data from a coarse grid to detailed small scale areas.
In order to do so, one needs a large volume of past model forecast data as well as the corresponding recorded data for any given location. The MOS-System relates these two sets of data in an optimized fashion allowing development of the local weather forecast by using the most current model forecast.

What are the time intervals used in the temperature and icons of the local forecasts?


The forecasted maximum temperature always refers to a 12hour window from 6am to 6om local time.
The forecasted minimum temperature always refers to the 12hour window from 6pm of the day before the forecast day to 6 am of the forecast day.
The weather icon for the morning refers to the time between 6am and 12pm local time, the icon for the afternoon is valid from 12am to 6pm local time and the evening icon refers to the time from 6pm to 12am local time.

How often are the current weather conditions and forecasts updated?


The current weather information as well as the satellite images are updated every 30 minutes whereas the radar images are being updated every 15 minutes.
The local weather forecasts as well as the weather charts are updated 8 times a day. The updates start at 2 am CEST or 3 am CEST depending on daylight saving time and continue on a three hourly bases.


Nearby Weather Stations - Dassen Distance
Geelbek 23.2 km
Langebaan 36.1 km
Langebaanweg AP 48.5 km
Robben 51.4 km
Table Bay 64.3 km
Molteno Reservior 66.0 km
Cape Columbine 67.0 km
Air Force Base Ysterplaat 69.0 km
Malmesbury 70.7 km
Cape Town Intl. Airport 81.8 km
Slangkop 81.8 km
Paarl 103.3 km
Cape Point 109.0 km
Strand 115.2 km
Vyeboom 136.2 km
Lambert's Bay 148.9 km
Worcester 155.4 km
Worcester 155.4 km
Excelsior Ceres 157.4 km
Clanwilliam 158.6 km
Hermanus 165.6 km
Vredendal Airport 190.7 km
Robertson 206.2 km
Riviersonderend 216.6 km
Nieuwoudtville 245.7 km
Cape Agulhas 261.8 km
Struisbaai 264.4 km
Calvinia Airport 278.0 km
Sutherland 307.4 km
Laingsburg 310.7 km
Koingnaas 352.6 km
Ladismith 355.5 km
Riversdale 359.4 km
Porterville 372.8 km
Stilbaai 380.6 km
Springbok Airport 397.6 km
Brandvlei 409.2 km
Fraserburg Airport 413.2 km
Prince Albert 438.5 km
Mossel Bay Airport 459.7 km
Port Nolloth 464.4 km
Pofadder 474.2 km
George Airport 482.8 km
Beaufort West 509.5 km
Vanwyksvlei 525.0 km
Prieska 648.8 km