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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 - Aalten Distance
Bocholt 8.3 km
Eibergen 20.6 km
Kalkar 38.1 km
Baerl 45.6 km
Ahaus 46.2 km
Twente 55.0 km
Weeze Airport 57.0 km
Arcen 60.2 km
Heino 68.3 km
Düsseldorf Airport 70.5 km
Essen 70.7 km
Mönchengladbach Airport 74.4 km
Mönchengladbach Airport 74.4 km
Deelen 78.3 km
Hoogeveen 94.0 km
Waltrop-Abdinghof 98.5 km
Volkel Air Base 99.4 km
Lüdinghausen 107.1 km
Lingen 107.1 km
Marknesse 116.7 km
Ell 118.0 km
Nörvenich 118.9 km
Geilenkirchen 119.5 km
Meppen 122.9 km
Dortmund/Wickede 123.8 km
Fliegerhorst Meppen 124.2 km
Münster Osnabrück Intl. Airport 128.4 km
K�ln-Stammheim 131.1 km
Lelystad Airport 131.5 km
Cologne Bonn Airport 132.0 km
Lommersum 133.9 km
Orsbach 136.1 km
Groningen-Eelde 136.4 km
Nideggen-Schmidt 137.1 km
Eindhoven 137.4 km
Maastricht-Beek 139.5 km
Lüdenscheid 139.9 km
Holzlar 146.4 km
Neunkirchen-Seelscheid /Krawinkel 146.6 km
Kleine-Brogel 146.9 km
Werl 151.3 km
Kall 154.9 km
De Bilt 155.6 km
Nieuw-Beerta 157.7 km
Herwijnen 157.7 km
Eckenhagen 161.3 km
Bad Neuenahr-Ahrweiler 162.3 km
Mont Rigi 162.9 km
Alfhausen 163.9 km
Elsenborn 164.2 km
Neheim ded 164.7 km
Diepenbeek 165.2 km
Leeuwarden 171.3 km
Spa 172.7 km
Lauwersoog 172.7 km
Barweiler 173.6 km
Stavoren 173.8 km
Hilgenroth 176.0 km
Schneifelforsthaus 177.1 km
Hümmerich 178.5 km
Emden Airport 180.2 km
Cabauw 182.0 km
Lennestadt-Theten 183.7 km
Belm 184.2 km
Gilze en Rijen 185.5 km
Liege / Bierset 186.0 km
Retie 186.7 km
Borkum Airport 188.5 km
Andernach 188.8 km
Awg-1 Sea 189.4 km
Eslohe 191.1 km
Schaffen 194.5 km
Berkhout 195.0 km
Friesoythe - Altenoythe 196.6 km
Büchel Airport 198.5 km
Manderscheid 200.4 km
Amsterdam-Schiphol 203.0 km
Koblenz Falkenstein-Kaserne 203.0 km
Bad Marienberg 206.8 km
Norderney 210.6 km
Diepholz Airport 211.7 km
Montabaur 212.4 km
Terschelling Hoorn 212.9 km
Spangdahlem 213.6 km
Siegerland Airport 214.1 km
Großenkneten 218.4 km
Wittmund Airport 219.6 km
Stünzel 225.0 km
Kahler Asten 228.3 km
Wijk aan Zee 228.6 km
Dillenburg 228.7 km
De Kooy Airfield 229.0 km
Frankfurt- Hahn Airport 229.5 km
Paderborn Lippstadt Airport 230.3 km
Kleinendorf 233.3 km
Rotterdam The Hague Airport 235.7 km
Nastätten 236.8 km
Vlieland 236.8 km
Beauvechain 237.4 km
L�hnberg-Obershausen 237.8 km