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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.


Stations météo à proximité - Harlingen Distance
Terschelling Hoorn 24.0 km
Stavoren 34.5 km
Leeuwarden 37.6 km
Vlieland 58.0 km
Awg-1 Sea 66.1 km
L9-ff-1 Sea 71.1 km
Marknesse 73.3 km
De Kooy Airfield 78.0 km
Berkhout 78.4 km
Lelystad Aéroport 81.2 km
Lauwersoog 89.2 km
Wijk aan Zee 119.1 km
Amsterdam-Schiphol 119.9 km
De Bilt 123.3 km
Heino 123.8 km
Groningue-Eelde 128.1 km
Deelen 133.5 km
Hoogeveen 135.0 km
Hoorn-a Sea 145.8 km
Cabauw 145.9 km
Borkum Aéroport 148.3 km
Herwijnen 149.3 km
Voorschoten 160.4 km
Base aérienne Volkel-Uden 171.7 km
Rotterdam-La Haye (Aéroport) 175.2 km
Eibergen 183.4 km
Kalkar 185.4 km
Gilze en Rijen 187.7 km
F16-a Sea 189.1 km
Nieuw-Beerta 191.1 km
Eindhoven 192.1 km
Twente 192.2 km
Weeze (Aéroport) 192.6 km
Bocholt 193.2 km
Hoek van Holland 199.4 km
Norderney 200.0 km
F3-FB1 200.6 km
Emden Aéroport 201.1 km
K14-fa-1c Sea 201.2 km
Arcen 205.0 km
Ahaus 207.4 km
Meppen 216.0 km
Fliegerhorst Meppen 216.8 km
Lingen 221.3 km
Réthy 222.5 km
Ell 222.8 km
Kleine-Brogel 223.5 km
Woensdrecht 227.9 km
Baerl 232.8 km
Stabroek 238.0 km
Le Goeree 240.7 km
Anvers/Deurne 244.9 km
Schaffen 245.4 km
K13-A 246.8 km
Mönchengladbach Aéroport 246.9 km
Mönchengladbach Aéroport 246.9 km
Feuerschiff Deutsche Bucht 249.4 km
Wilhelminadorp 250.3 km
P11-b Sea 251.2 km
Diepenbeek 251.2 km
Wittmund Aéroport 251.9 km
Maastricht-Beek 254.1 km
Wavre-Sainte-Catherine 254.8 km
Geilenkirchen 255.4 km
Düsseldorf Aéroport 256.4 km
Essen 260.7 km
Orsbach 272.3 km
Bruxelles Aéroport 272.3 km
Euro Platform 273.9 km
Friesoythe - Altenoythe 275.1 km
Münster/Osnabrück (Aéroport) 277.3 km
Westdorpe 279.3 km
Lüdinghausen 279.6 km
Beauvechain 279.8 km
Waltrop-Abdinghof 280.4 km
Flessingue 280.4 km
Liège/Bierset 280.7 km
J6-a Helipad Oil Platform 286.0 km
Alfhausen 287.3 km
Uccle 290.3 km
Nörvenich 294.2 km
Helgoland/Düne 294.8 km
Nideggen-Schmidt 299.2 km
Wangerland 300.2 km
Ernage 301.9 km
Melle 303.6 km
Mont Rigi 303.7 km
Spa 303.9 km
Dortmund/Wickede 304.5 km
D15-fa-1 Sea 305.6 km
A12-cpp Sea 306.3 km
Phare d'Alte Weser Phare 309.0 km
Elsenborn 312.2 km
Lommersum 312.7 km
Großenkneten 313.6 km
Gavere 317.8 km
Belm 319.3 km
K�ln-Stammheim 319.3 km
Aéroport Konrad-Adenauer de Cologne-Bonn 320.4 km
Charleroi/Gosselies 320.6 km