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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.


Estaciones meteorológicas cercanas - Hellevoetsluis Distancia
Hoek van Holland 18.6 km
Wilhelminadorp 39.6 km
Róterdam-La Haya aeropuerto 39.9 km
Woensdrecht 47.3 km
Voorschoten 50.5 km
Le Goeree 51.7 km
Stabroek 61.2 km
Flesinga 70.5 km
Westdorpe 72.2 km
Amberes / Deurne 78.8 km
Cabauw 92.4 km
Amsterdam-Schiphol 93.2 km
Wijk aan Zee 93.7 km
Sint-Katelijne-Waver 94.0 km
Gilze en Rijen 95.0 km
Euro Platform 95.8 km
Melle 98.7 km
P11-b Sea 105.4 km
Gavere 110.2 km
Bruselas Aeropuerto 111.8 km
Zeebrugge 114.4 km
Herwijnen 115.2 km
Uccle 116.2 km
Retie 121.8 km
Hoorn-a Sea 122.3 km
De Bilt 122.8 km
Berkhout 132.7 km
Beauvechain 138.7 km
Schaffen 139.3 km
Chièvres 141.4 km
De Kooy Airfield 143.7 km
Beitem 150.2 km
Eindhoven 150.3 km
Ernage 152.4 km
Charleroi / Gosselies 154.4 km
Ostende Aeropuerto 155.1 km
Kleine-Brogel 166.7 km
K14-fa-1c Sea 170.3 km
Lelystad Aeropuerto 171.8 km
Volkel Air Base 177.9 km
Diepenbeek 178.9 km
Lille-Lesquin aeropuerto 179.0 km
Stavoren 181.3 km
Koksijde 181.9 km
Vlieland 182.3 km
K13-A 185.0 km
Florennes 185.5 km
Ell 196.0 km
Liege / Bierset 196.9 km
Dourbes 198.0 km
Deelen 198.6 km
Maastricht-Beek 210.7 km
Dunkerque 216.0 km
Humain 219.3 km
Marknesse 219.7 km
L9-ff-1 Sea 220.5 km
Terschelling Hoorn 221.5 km
Baja Renania aeropuerto 227.6 km
Charleville-Mézières 232.9 km
Geilenkirchen 234.2 km
Arcen 234.6 km
Kalkar 239.5 km
Orsbach 240.5 km
Leeuwarden 241.1 km
St. Hubert/Ardennen 244.0 km
San Quintín 244.5 km
Heino 248.1 km
Spa 249.0 km
F16-a Sea 255.7 km
Méaulte 258.4 km
J6-a Helipad Oil Platform 258.4 km
Albert Aeropuerto 258.8 km
Mont Rigi 260.6 km
Bocholt 269.0 km
Mönchengladbach Aeropuerto 273.6 km
Mönchengladbach Aeropuerto 273.6 km
Elsenborn 274.5 km
Awg-1 Sea 275.3 km
Eibergen 283.4 km
Nideggen-Schmidt 286.2 km
Baerl 289.5 km
Reims - Prunay Aerodrome 289.6 km
Hoogeveen 291.7 km
Lauwersoog 292.0 km
Buzenol 293.6 km
Düsseldorf Aeropuerto 300.8 km
Nörvenich 303.5 km
Boulogne-sur-Mer 304.9 km
Kall 305.7 km
Schneifelforsthaus 306.4 km
D15-fa-1 Sea 308.2 km
Groninga-Eelde 311.0 km
Manston 312.3 km
Le Touquet-Paris-Plage 313.6 km
Twente 313.8 km
Abbeville 315.6 km
Ahaus 315.8 km
Langdon Bay 317.2 km
Essen 320.6 km
Lommersum 321.9 km