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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.


Nearby Weather Stations - Aachen Distance
Orsbach 6.8 km
Geilenkirchen 20.1 km
Mont Rigi 29.6 km
Maastricht-Beek 36.5 km
Elsenborn 36.8 km
Spa 38.0 km
Nideggen-Schmidt 39.5 km
Ell 58.1 km
Kall 58.8 km
Nörvenich 64.4 km
Schneifelforsthaus 64.9 km
Mönchengladbach Airport 68.1 km
Mönchengladbach Airport 68.1 km
Liege / Bierset 72.0 km
Diepenbeek 72.0 km
Lommersum 79.1 km
Arcen 80.4 km
Kleine-Brogel 80.7 km
Weeze Airport 90.7 km
Düsseldorf Airport 95.0 km
Barweiler 99.2 km
Eindhoven 104.7 km
Volkel Air Base 105.6 km
Baerl 105.7 km
Kalkar 107.1 km
Manderscheid 109.8 km
Spangdahlem 112.4 km
St. Hubert/Ardennen 112.6 km
Humain 113.1 km
Bad Neuenahr-Ahrweiler 115.5 km
Schaffen 115.7 km
K�ln-Stammheim 118.3 km
Cologne Bonn Airport 119.9 km
Essen 120.0 km
Holzlar 123.6 km
Retie 126.4 km
Bocholt 126.5 km
Büchel Airport 127.8 km
Luxembourg 130.0 km
Trier/Petrisberg 131.2 km
Buzenol 140.7 km
Nennig 142.1 km
Deelen 143.8 km
Neunkirchen-Seelscheid /Krawinkel 143.9 km
Beauvechain 146.6 km
Andernach 154.0 km
Gilze en Rijen 154.7 km
Eibergen 155.4 km
Deuselbach 156.3 km
Hümmerich 157.6 km
Ernage 157.7 km
Weiskirchen 158.6 km
Herwijnen 158.7 km
Frankfurt- Hahn Airport 160.8 km
Florennes 170.8 km
Waltrop-Abdinghof 172.1 km
Ahaus 172.4 km
Koblenz Falkenstein-Kaserne 172.6 km
Brussels Airport 173.0 km
Hilgenroth 174.5 km
Sint-Katelijne-Waver 176.5 km
De Bilt 177.0 km
Tholey 179.7 km
Lüdenscheid 180.9 km
Berus 181.0 km
Dourbes 181.7 km
Eckenhagen 181.9 km
Cabauw 183.2 km
Idar-Oberstein 183.5 km
Heino 183.8 km
Charleroi / Gosselies 185.2 km
Antwerpen / Deurne 185.8 km
Twente 187.6 km
Dortmund/Wickede 188.6 km
Wahlbach 189.7 km
Uccle 191.9 km
Lüdinghausen 194.1 km
Lelystad Airport 195.5 km
Charleville-Mézières 195.8 km
Montabaur 195.9 km
Metz-Nancy-Lorraine 200.2 km
Stabroek 200.6 km
Neunkirchen-Wellesweiler 204.4 km
Saarbrücken/Ensheim 207.8 km
Woensdrecht 208.4 km
Nastätten 209.2 km
Bad Marienberg 209.3 km
Marknesse 213.4 km
Werl 219.1 km
Lennestadt-Theten 220.0 km
Amsterdam-Schiphol 222.6 km
Siegerland Airport 222.8 km
Rotterdam The Hague Airport 223.1 km
Neheim ded 224.0 km
Hoogeveen 224.1 km
Ramstein Air Base 225.1 km
Geisenheim 226.2 km
Nancy/Essey 232.1 km
Runkel - Ennerich 233.0 km
Münster Osnabrück Intl. Airport 233.5 km