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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.


Nächste Wetterstation - Köln Abstand
K�ln-Stammheim 21.0 km
Köln/Bonn Flughafen 22.5 km
Lommersum 31.6 km
Holzlar 33.4 km
Nörvenich 36.0 km
Düsseldorf Flughafen 45.7 km
Neunkirchen-Seelscheid /Krawinkel 46.3 km
Bad Neuenahr-Ahrweiler 46.7 km
Essen 52.0 km
Mönchengladbach Flughafen 61.0 km
Mönchengladbach Flughafen 61.0 km
Barweiler 64.3 km
Nideggen-Schmidt 67.5 km
Kall 68.2 km
Hümmerich 69.9 km
Baerl 70.3 km
Andernach 75.6 km
Hilgenroth 79.0 km
Eckenhagen 82.4 km
Lüdenscheid 82.7 km
Büchel Flughafen 84.5 km
Waltrop-Abdinghof 88.0 km
Koblenz Falkenstein-Kaserne 92.2 km
Schneifelforsthaus 92.2 km
Manderscheid 93.6 km
Dortmund/Wickede 96.6 km
Elsenborn 101.3 km
Geilenkirchen 103.3 km
Arcen 105.9 km
Orsbach 106.0 km
Montabaur 108.5 km
Mont Rigi 110.3 km
Spangdahlem 110.5 km
Bocholt 110.6 km
Lüdinghausen 111.7 km
Frankfurt-Hahn Flughafen 114.0 km
Bad Marienberg 114.6 km
Niederrhein Flughafen 117.0 km
Kalkar 117.9 km
Lennestadt-Theten 120.3 km
Werl 124.7 km
Wahlbach 124.8 km
Siegerland Flughafen 126.7 km
Neheim ded 126.9 km
Ahaus 126.9 km
Spa 127.0 km
Nastätten 128.9 km
Deuselbach 129.8 km
Eibergen 130.1 km
Maastricht-Beek 131.7 km
Trier/Petrisberg 135.5 km
Ell 136.8 km
Eslohe 137.6 km
Idar-Oberstein 142.8 km
Runkel - Ennerich 143.7 km
Dillenburg 146.4 km
Twente 147.5 km
L�hnberg-Obershausen 147.6 km
Geisenheim 151.8 km
Weiskirchen 153.9 km
Münster/Osnabrück Flughafen 155.5 km
Stünzel 156.3 km
Tholey 161.5 km
Militärflugplatz Volkel 161.6 km
Nennig 167.2 km
Luxemburg 167.8 km
Diepenbeek 168.8 km
Kleine-Brogel 169.0 km
Kahler Asten 171.6 km
Lüttich / Bierset 171.7 km
Waldems 172.5 km
Deelen 174.0 km
Ruppertsecken 174.4 km
Neunkirchen-Wellesweiler 178.4 km
Lingen 179.1 km
Ramstein Air Base 179.7 km
Wiesbaden 179.9 km
Eindhoven 181.8 km
Kleiner Feldberg 182.5 km
Heino 183.7 km
Alzey 184.7 km
Berus 187.1 km
Gießen 190.3 km
Saarbrücken/Ensheim 190.7 km
Thülen 194.6 km
Paderborn/Lippstadt Flughafen 198.4 km
Frankfurt Flughafen 199.9 km
Meppen 200.7 km
Marburg 200.8 km
St. Hubert/Ardennen 200.8 km
Alfhausen 201.6 km
Fliegerhorst Meppen 201.7 km
Frankfurt Main Flughafen 202.0 km
Belm 203.1 km
Pirmasens 204.7 km
Burgwald-Bottendorf 205.5 km
Hoogeveen 205.7 km
Humain 207.6 km
Nauheim. Bad 208.3 km
Bad Dürkheim 211.4 km

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