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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.


Estaciones meteorológicas cercanas - Clanwilliam Distancia
Clanwilliam 1.2 km
Lambert's Bay 62.8 km
Vredendal aeropuerto 67.8 km
Nieuwoudtville 89.5 km
Excelsior Ceres 103.5 km
Langebaanweg aeropuerto 116.2 km
Calvinia aeropuerto 122.8 km
Cape Columbine 134.9 km
Langebaan 136.7 km
Malmesbury 138.2 km
Geelbek 138.5 km
Paarl 163.5 km
Worcester 165.7 km
Worcester 165.7 km
Isla Robben 181.6 km
Air Force Base Ysterplaat 187.7 km
Bahía de la Mesa 189.6 km
Ciudad del Cabo aeropuerto 192.4 km
Molteno Reservior 194.0 km
Sutherland 199.8 km
Vyeboom 200.4 km
Robertson 205.5 km
Strand 209.0 km
Slangkop 218.6 km
Porterville 227.1 km
Cabo Point 234.1 km
Riviersonderend 237.0 km
Hermanus 241.4 km
Laingsburg 245.9 km
Brandvlei 251.9 km
Koingnaas 273.9 km
Springbok Aeropuerto 285.9 km
Fraserburg aeropuerto 294.3 km
Ladismith 300.6 km
Struisbaai 306.1 km
Cabo de las Agujas 307.0 km
Pofadder 323.8 km
Riversdale 331.0 km
Stilbaai 361.0 km
Prince Albert 364.6 km
Vanwyksvlei 377.6 km
Port Nolloth 383.4 km
Vioolsdrif 393.4 km
Cataratas Augrabies 407.6 km
Beaufort West 408.6 km
Mosselbaai Aeropuerto 420.0 km
George aeropuerto 434.7 km
Alexander Bay 462.8 km
Upington Aeropuerto 473.4 km
Prieska 501.3 km