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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 - Cannon Rocks Distancia
Port Alfred Aeropuerto 41.4 km
Grahamstown 46.8 km
Parque nacional de los Elefantes de Addo 94.4 km
Fort Beaufort 96.7 km
Port of Ngqura 98.2 km
Puerto Elizabeth Aeropuerto 106.5 km
Somerset East 116.0 km
Bhisho 117.4 km
Uitenhage 124.4 km
Döhne 159.3 km
King Phalo aeropuerto 159.5 km
Queenstown 186.0 km
Queenstown 187.3 km
Cradock 189.4 km
Patensie 193.0 km
St Francis Bay 196.4 km
Jamestown 263.4 km
Graaff-Reinet 271.7 km
Elliot 279.6 km
Aliwal North aeropuerto 295.7 km
Tsitsikamma National Park 296.4 km
Joubertina 298.8 km
Barkly East 302.7 km
Noupoort 313.0 km
Mthatha 321.4 km
Coffee Bay 337.8 km
Gariep Dam 341.0 km
Willowmore 342.8 km
Willowmore 342.8 km
Plettenberg Bay 360.2 km
Knysna 387.1 km
Port St. Johns 393.4 km
Wepener 402.7 km
Fauresmith 421.7 km
De Aar 421.8 km
Maseru-Mia 440.6 km
Kokstad 449.9 km
Bloemfontein 463.9 km
Bloemfontein Aeropuerto 464.4 km
George aeropuerto 464.6 km
Beaufort West 467.3 km
Port Edward 487.0 km
Mosselbaai Aeropuerto 491.8 km
Shaleburn 499.1 km
Paddock 507.3 km
Margate 507.8 km
Prince Albert 507.9 km
Ixopo 526.9 km
Giant's Castle 550.5 km
Sezela 563.1 km
Cedara 585.7 km
Pietermaritzburgo Aeropuerto 586.9 km
Mooi River 587.8 km
Pietermaritzburgo 588.1 km
Prieska 592.5 km
Estcourt 595.5 km
Greytown 641.2 km