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 - Dahlem Abstand
Kall 13.1 km
Schneifelforsthaus 16.7 km
Nideggen-Schmidt 34.8 km
Barweiler 35.7 km
Manderscheid 41.8 km
Elsenborn 41.8 km
Lommersum 44.9 km
Spangdahlem 48.1 km
Nörvenich 50.8 km
Mont Rigi 55.8 km
Büchel Flughafen 61.2 km
Bad Neuenahr-Ahrweiler 62.3 km
Trier/Petrisberg 71.3 km
Spa 71.4 km
Orsbach 74.4 km
Holzlar 81.5 km
K�ln-Stammheim 84.8 km
Geilenkirchen 85.4 km
Köln/Bonn Flughafen 86.0 km
Deuselbach 88.7 km
Luxemburg 92.6 km
Frankfurt-Hahn Flughafen 93.1 km
Mönchengladbach Flughafen 93.8 km
Mönchengladbach Flughafen 93.8 km
Nennig 95.3 km
Weiskirchen 96.6 km
Andernach 97.0 km
Maastricht-Beek 103.8 km
Düsseldorf Flughafen 103.8 km
Neunkirchen-Seelscheid /Krawinkel 105.4 km
Hümmerich 106.1 km
Tholey 114.3 km
Koblenz Falkenstein-Kaserne 114.5 km
Idar-Oberstein 115.3 km
Essen 122.0 km
Wahlbach 124.3 km
Berus 124.7 km
Ell 125.6 km
Baerl 125.7 km
Lüttich / Bierset 126.0 km
Hilgenroth 128.6 km
Arcen 129.5 km
St. Hubert/Ardennen 133.8 km
Diepenbeek 135.9 km
Buzenol 137.0 km
Neunkirchen-Wellesweiler 137.9 km
Montabaur 140.4 km
Niederrhein Flughafen 141.8 km
Saarbrücken/Ensheim 143.5 km
Eckenhagen 145.1 km
Humain 146.1 km
Kleine-Brogel 148.5 km
Nastätten 148.7 km
Kalkar 152.6 km
Lüdenscheid 154.4 km
Ramstein Air Base 156.8 km
Metz-Nancy-Lorraine 158.5 km
Bad Marienberg 159.9 km
Bocholt 160.4 km
Geisenheim 162.4 km
Waltrop-Abdinghof 164.4 km
Ruppertsecken 168.8 km
Militärflugplatz Volkel 169.5 km
Dortmund/Wickede 172.3 km
Eindhoven 172.8 km
Siegerland Flughafen 174.4 km
Pirmasens 175.5 km
Runkel - Ennerich 177.0 km
Schaffen 178.7 km
Lennestadt-Theten 184.2 km
Eibergen 186.5 km
Lüdinghausen 188.1 km
Alzey 189.1 km
L�hnberg-Obershausen 189.1 km
Nancy/Essey 190.4 km
Retie 192.4 km
Ahaus 192.7 km
Dillenburg 195.2 km
Neheim ded 198.7 km
Werl 198.8 km
Deelen 200.5 km
Wiesbaden 201.0 km
Beauvechain 202.6 km
Waldems 202.8 km
Eslohe 203.6 km
Weinbiet 207.3 km
Ernage 208.8 km
Bad Dürkheim 209.2 km
Nancy/Ochey 209.4 km
Twente 211.8 km
Kleiner Feldberg 211.9 km
Florennes 212.2 km
Stünzel 213.0 km
Bad Bergzabern 214.4 km
Dourbes 219.3 km
Gilze en Rijen 222.6 km
Frankfurt Flughafen 223.0 km
Charleville-Mézières 223.5 km
Frankfurt Main Flughafen 225.3 km
Herwijnen 226.4 km