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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 - Riversdale Distancia
Riversdale 0.0 km
Stilbaai 32.9 km
Ladismith 60.5 km
Mosselbaai Aeropuerto 100.7 km
Laingsburg 101.2 km
Prince Albert 126.3 km
George aeropuerto 126.3 km
Riviersonderend 150.2 km
Struisbaai 151.4 km
Robertson 153.2 km
Cabo de las Agujas 158.0 km
Sutherland 188.3 km
Knysna 204.1 km
Worcester 204.4 km
Worcester 204.4 km
Fraserburg aeropuerto 226.5 km
Hermanus 229.3 km
Beaufort West 230.2 km
Plettenberg Bay 231.4 km
Vyeboom 233.8 km
Excelsior Ceres 233.9 km
Paarl 257.1 km
Willowmore 263.7 km
Strand 267.3 km
Malmesbury 289.3 km
Joubertina 292.4 km
Tsitsikamma National Park 295.0 km
Ciudad del Cabo aeropuerto 295.2 km
Air Force Base Ysterplaat 306.7 km
Cabo Point 307.4 km
Bahía de la Mesa 314.1 km
Molteno Reservior 316.4 km
Calvinia aeropuerto 318.9 km
Isla Robben 322.3 km
Slangkop 326.6 km
Clanwilliam 330.0 km
Geelbek 360.9 km
Langebaanweg aeropuerto 362.6 km
Nieuwoudtville 373.8 km
Langebaan 374.9 km
Brandvlei 385.7 km
Lambert's Bay 389.2 km
Vanwyksvlei 391.7 km
Vredendal aeropuerto 397.1 km
Patensie 398.4 km
St Francis Bay 399.1 km
Cape Columbine 400.5 km
Graaff-Reinet 415.0 km
De Aar 467.0 km
Uitenhage 467.3 km
Puerto Elizabeth Aeropuerto 486.2 km
Port of Ngqura 492.7 km
Porterville 495.0 km
Parque nacional de los Elefantes de Addo 505.0 km
Noupoort 507.7 km
Somerset East 508.6 km
Cradock 524.0 km
Gariep Dam 599.0 km
Koingnaas 601.2 km