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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.


Estações Meteorológicas Próximas - Arras Distância
Méaulte 35.7 km
Albert Aeroporto 36.0 km
Lille Airport 47.3 km
Saint-Quentin 69.6 km
Beitem 78.6 km
Koksijde 90.9 km
Dunquerque 98.9 km
Oostende Aeroporto 102.3 km
Abbeville 107.1 km
Beauvais/Tille 117.3 km
Creil 118.7 km
Chièvres 121.1 km
Gavere 122.0 km
Zeebrugge 127.1 km
Le Touquet-Paris-Plage 132.4 km
Melle 138.6 km
Bolonha do Mar 140.9 km
Aeroporto de Paris-Charles de Gaulle 143.6 km
Aeroporto de Paris-Le Bourget 151.0 km
Cormeilles 157.4 km
Flessingue 158.4 km
Westdorpe 159.1 km
Parque Montsouris 169.9 km
Aeroporto de Paris-Orly 179.8 km
Villacoublay/Velizy 180.7 km
Uccle 184.5 km
Langdon Bay 185.5 km
Melun 185.7 km
Toussus-le-Noble 186.3 km
Wilhelminadorp 186.4 km
Charleroi / Gosselies 186.6 km
Trappes 189.0 km
Dieppe 191.4 km
Reims - Prunay Aerodrome 194.0 km
Euro Platform 198.3 km
Manston 198.8 km
Dourbes 203.3 km
Rouen/Boos 204.3 km
Bruxelas Aeroporto 206.5 km
Florennes 207.9 km
Le Goeree 208.1 km
Stabroek 210.6 km
Sint-Katelijne-Waver 212.9 km
Antwerpen / Deurne 213.3 km
Charleville-Mézières 213.3 km
Ernage 213.8 km
Woensdrecht 215.8 km
Lydd Airport 218.5 km
Evreux/Fauville 224.2 km
Beauvechain 226.8 km
Châlons Vatry Airport 227.3 km
P11-b Sea 238.0 km
Hoek van Holland 239.1 km
Chartres 247.5 km
Troyes - Barberey Airport 257.6 km
Shoeburyness 259.7 km
Aeroporto de Roterdã-Haia 262.1 km
Schaffen 266.3 km
Retie 271.1 km
London Southend Airport 273.0 km
Humain 274.7 km
Voorschoten 276.4 km
Gilze en Rijen 278.6 km
Orleães 279.6 km
Herstmonceux 282.8 km
Auxerre 287.3 km
Wattisham Airport 288.5 km
Châteaudun 291.7 km
St. Hubert/Ardennen 292.6 km
St Dizier/Robinson 298.5 km
Liege / Bierset 299.6 km
Cabauw 303.7 km
Diepenbeek 305.1 km
Deauville-Saint-Gatien 308.6 km
Deauville-Saint-Gatien AP 308.7 km
Le Havre/Octeville 311.9 km
Norwich Weather Centre 314.2 km
Kleine-Brogel 314.4 km
Sainte-Adresse 314.7 km
Andrewsfield Aerodrome 315.7 km
Herwijnen 316.7 km
Amsterdam-Schiphol 317.6 km
Wijk aan Zee 319.3 km
Buzenol 320.4 km
Eindhoven 320.5 km
Biggin Hill 327.7 km
K13-A 329.6 km
Hoorn-a Sea 329.9 km
Londres 333.0 km
De Bilt 334.8 km
Aeroporto de Londres Stansted 335.1 km
Aérodrome de Blois 338.4 km
Kenley 339.6 km
Maastricht-Beek 341.3 km
Lakenheath 342.4 km
Aeroporto de Londres Gatwick 344.0 km
Mildenhall Royal Air Force 344.8 km
K14-fa-1c Sea 344.9 km
Brighton City Airport 346.8 km
Ell 347.3 km