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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 - Piketberg Distancia
Malmesbury 60.0 km
Langebaanweg aeropuerto 67.2 km
Excelsior Ceres 74.2 km
Clanwilliam 77.4 km
Geelbek 79.0 km
Langebaan 85.7 km
Paarl 88.9 km
Cape Columbine 102.3 km
Lambert's Bay 103.4 km
Isla Robben 104.9 km
Worcester 108.4 km
Worcester 108.4 km
Air Force Base Ysterplaat 109.6 km
Bahía de la Mesa 111.8 km
Ciudad del Cabo aeropuerto 114.0 km
Molteno Reservior 116.4 km
Vyeboom 128.4 km
Strand 132.0 km
Vredendal aeropuerto 133.4 km
Slangkop 141.1 km
Cabo Point 155.8 km
Robertson 157.7 km
Nieuwoudtville 167.7 km
Hermanus 169.0 km
Riviersonderend 182.2 km
Calvinia aeropuerto 187.3 km
Sutherland 218.3 km
Laingsburg 235.9 km
Cabo de las Agujas 246.1 km
Struisbaai 246.4 km
Ladismith 286.3 km
Riversdale 302.9 km
Porterville 305.1 km
Brandvlei 318.8 km
Fraserburg aeropuerto 322.9 km
Stilbaai 329.2 km
Koingnaas 330.1 km
Springbok Aeropuerto 355.0 km
Prince Albert 363.0 km
Mosselbaai Aeropuerto 399.7 km
Pofadder 402.2 km
George aeropuerto 419.1 km
Beaufort West 425.0 km
Vanwyksvlei 431.4 km
Port Nolloth 442.4 km
Vioolsdrif 462.8 km
Cataratas Augrabies 483.8 km
Alexander Bay 522.6 km
Upington Aeropuerto 545.2 km
Prieska 555.2 km