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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 - Robertson Distancia
Robertson 3.5 km
Riviersonderend 33.0 km
Worcester 53.3 km
Worcester 53.3 km
Vyeboom 86.5 km
Hermanus 98.7 km
Struisbaai 102.8 km
Paarl 104.6 km
Excelsior Ceres 105.2 km
Cabo de las Agujas 105.4 km
Strand 121.5 km
Laingsburg 126.3 km
Malmesbury 137.2 km
Ciudad del Cabo aeropuerto 145.4 km
Riversdale 152.5 km
Air Force Base Ysterplaat 156.0 km
Ladismith 157.0 km
Bahía de la Mesa 163.4 km
Cabo Point 165.0 km
Molteno Reservior 166.1 km
Isla Robben 170.7 km
Sutherland 173.8 km
Stilbaai 174.2 km
Slangkop 179.4 km
Clanwilliam 207.2 km
Geelbek 209.4 km
Langebaanweg aeropuerto 213.4 km
Langebaan 224.0 km
Prince Albert 245.1 km
Calvinia aeropuerto 248.3 km
Cape Columbine 251.3 km
Mosselbaai Aeropuerto 253.1 km
Lambert's Bay 257.4 km
Fraserburg aeropuerto 268.7 km
Vredendal aeropuerto 276.0 km
Nieuwoudtville 276.3 km
George aeropuerto 277.1 km
Beaufort West 332.7 km
Knysna 355.1 km
Brandvlei 357.7 km
Plettenberg Bay 382.7 km
Willowmore 404.8 km
Porterville 414.0 km
Vanwyksvlei 420.5 km
Joubertina 441.6 km
Tsitsikamma National Park 445.8 km
Koingnaas 481.4 km
Springbok Aeropuerto 492.0 km
Pofadder 496.1 km
Prieska 534.9 km
Port Nolloth 591.7 km