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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.


Estações Meteorológicas Próximas - Rio Sundays Distância
Port of Ngqura 22.0 km
Addo Elephant National Park 29.7 km
Porto Elizabeth Aeroporto 37.3 km
Uitenhage 46.4 km
Somerset East 68.4 km
Grahamstown 84.3 km
Patensie 115.1 km
Port Alfred Airport 115.8 km
St Francis Bay 123.2 km
Fort Beaufort 127.6 km
Cradock 157.6 km
Bhisho 179.1 km
Graaff-Reinet 210.4 km
Queenstown 213.2 km
Queenstown 213.6 km
Döhne 216.0 km
Tsitsikamma National Park 219.4 km
Joubertina 221.1 km
King Phalo Airport 231.0 km
Willowmore 265.2 km
Willowmore 265.2 km
Noupoort 273.7 km
Jamestown 280.1 km
Plettenberg Bay 283.2 km
Knysna 309.8 km
Aliwal North Airport 312.8 km
Gariep Dam 321.3 km
Elliot 324.9 km
Barkly East 338.4 km
De Aar 371.8 km
Mthatha 380.8 km
George Airport 387.1 km
Beaufort West 392.7 km
Fauresmith 401.0 km
Coffee Bay 405.0 km
Mossel Bay Aeroporto 414.6 km
Wepener 418.3 km
Prince Albert 430.2 km
Port St. Johns 460.2 km
Bloemfontein 461.6 km
Bloemfontein Aeroporto 464.3 km
Maseru-Mia 464.6 km
Stilbaai 501.6 km
Kokstad 506.4 km
Ladismith 509.7 km
Riversdale 513.4 km
Fraserburg Airport 516.1 km
Prieska 537.7 km
Shaleburn 549.7 km
Vanwyksvlei 564.8 km
Ixopo 585.8 km
Giant's Castle 599.1 km
Estcourt 645.6 km