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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 - Harderwijk Distance
Lelystad Airport 15.8 km
Deelen 43.2 km
Marknesse 48.8 km
De Bilt 55.6 km
Stavoren 66.1 km
Heino 72.1 km
Herwijnen 74.6 km
Volkel Air Base 77.3 km
Berkhout 78.1 km
Cabauw 87.1 km
Amsterdam-Schiphol 92.1 km
Leeuwarden 98.2 km
Kalkar 99.5 km
Weeze Airport 102.1 km
Eindhoven 102.2 km
De Kooy Airfield 112.9 km
Wijk aan Zee 114.1 km
Arcen 114.3 km
Hoogeveen 114.6 km
Gilze en Rijen 115.4 km
Bocholt 117.0 km
Terschelling Hoorn 118.3 km
Eibergen 119.2 km
Vlieland 126.6 km
Ell 128.5 km
Awg-1 Sea 131.5 km
Kleine-Brogel 132.2 km
Voorschoten 133.4 km
Lauwersoog 134.8 km
Rotterdam The Hague Airport 137.2 km
Groningen-Eelde 138.2 km
Retie 141.4 km
Twente 143.2 km
Ahaus 150.4 km
Baerl 152.3 km
L9-ff-1 Sea 158.1 km
Mönchengladbach Airport 158.5 km
Mönchengladbach Airport 158.5 km
Maastricht-Beek 159.8 km
Diepenbeek 159.9 km
Geilenkirchen 161.0 km
Schaffen 161.7 km
Düsseldorf Airport 173.4 km
Hook of Holland 173.7 km
Woensdrecht 174.3 km
Hoorn-a Sea 175.0 km
Orsbach 177.8 km
Stabroek 179.9 km
Antwerpen / Deurne 180.7 km
Essen 183.2 km
Borkum Airport 183.5 km
Sint-Katelijne-Waver 186.4 km
Lingen 189.2 km
Liege / Bierset 189.3 km
Meppen 193.6 km
Fliegerhorst Meppen 194.8 km
Nieuw-Beerta 194.9 km
Brussels Airport 201.0 km
Beauvechain 201.0 km
Nörvenich 204.5 km
Nideggen-Schmidt 206.4 km
Mont Rigi 209.1 km
Spa 209.4 km
Wilhelminadorp 211.5 km
Emden Airport 213.0 km
Waltrop-Abdinghof 215.2 km
Elsenborn 217.9 km
Lüdinghausen 221.2 km
Uccle 221.8 km
Le Goeree 221.9 km
Ernage 223.4 km
Lommersum 223.6 km
Norderney 227.8 km
Kall 228.6 km
Westdorpe 231.9 km
Münster Osnabrück Intl. Airport 232.7 km
K�ln-Stammheim 236.3 km
Cologne Bonn Airport 237.5 km
Dortmund/Wickede 240.4 km
Humain 241.7 km
Schneifelforsthaus 243.4 km
K14-fa-1c Sea 243.8 km
Vlissingen 245.7 km
Charleroi / Gosselies 245.9 km
Holzlar 250.4 km
Melle 251.6 km
P11-b Sea 254.0 km
Neunkirchen-Seelscheid /Krawinkel 256.4 km
Lüdenscheid 256.5 km
Alfhausen 256.8 km
St. Hubert/Ardennen 257.8 km
Florennes 258.2 km
Bad Neuenahr-Ahrweiler 259.7 km
Barweiler 260.7 km
Euro Platform 263.6 km
Wittmund Airport 264.0 km
F16-a Sea 265.1 km
Friesoythe - Altenoythe 266.4 km
Werl 266.9 km
Gavere 268.0 km