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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 - Tonnerre Distance
Auxerre 47.0 km
Troyes - Barberey Airport 52.7 km
Châlons Vatry Airport 105.3 km
Aéroport de Nevers-Fourchambault 134.1 km
St Dizier/Robinson 135.5 km
Dijon Air Base 140.7 km
Reims - Prunay Aerodrome 152.3 km
Langres Airport 152.6 km
Saint-Yan 159.3 km
Melun 166.3 km
Avord 171.4 km
Tavaux 185.1 km
Dole Tavaux 185.6 km
Mâcon 195.5 km
Vichy/Charmeil 197.4 km
Bourges 198.3 km
Orly Airport 200.9 km
Charles de Gaulle Airport 205.6 km
Paris-Le Bourget Airport 210.5 km
Parc Montsouris 211.1 km
Villacoublay/Velizy 221.5 km
Creil 224.2 km
Charleville-Mézières 227.1 km
Toussus-le-Noble 230.1 km
Saint-Quentin 234.6 km
Besançon 234.8 km
Nancy/Ochey 237.5 km
Trappes 239.8 km
Orléans 246.1 km
Clermont/Aulnat 246.3 km
Cormeilles 255.2 km
Ambérieu-en-Bugey 256.3 km
Lyon- Bron Airport 259.3 km
Dourbes 259.5 km
St Etienne/Boutheon 259.8 km
Romorantin-Lanthenay 260.5 km
Buzenol 266.1 km
Lyon- Saint-Exupéry Airport 266.1 km
Luxeuil-les-Bains 266.9 km
Nancy/Essey 269.0 km
Châteauroux 270.7 km
Beauvais/Tille 273.3 km
Méaulte 274.5 km
Albert Airport 274.8 km
Florennes 275.3 km
Chartres 283.0 km
Metz-Nancy-Lorraine 283.6 km
La Dôle 285.2 km
Châteaudun 288.6 km
St. Hubert/Ardennen 290.1 km
Guéret Airport 291.6 km
Charleroi / Gosselies 295.4 km
Humain 297.3 km
Nyon (Changins) 298.6 km
Geneva Airport 299.1 km
Bière 302.5 km
Chièvres 303.1 km
Aérodrome de Blois 307.2 km
Le Puy 308.1 km
La Brévine 309.5 km
La Fretaz 311.3 km
Ernage 311.9 km
Grenoble- Isère Airport 314.9 km
Mathod 316.0 km
Lille Airport 317.3 km
Luxembourg 318.0 km
Annecy Airport 319.4 km
Dorans 320.8 km
Chambery/Aix Bains 324.9 km
La Chaux-de-Fonds 325.8 km
Nennig 328.2 km
Uccle 330.2 km
Evreux/Fauville 332.5 km
Beauvechain 334.0 km
Villars-Tiercelin 334.4 km
Pully 335.2 km
Fahy 335.3 km
Neuchâtel 337.6 km
Berus 340.9 km
Gavere 344.1 km
Brussels Airport 344.4 km
Chaumont 346.9 km
Abbeville 347.6 km
Melle 348.1 km
Payerne 350.7 km
Oron 351.7 km
Liege / Bierset 351.8 km
Beitem 352.1 km
Rouen/Boos 353.7 km
Chasseral 354.1 km
Cressier 355.6 km
Grenonble Lvd Airport 358.9 km
Le Bouveret 360.0 km
Sint-Katelijne-Waver 363.4 km
Tours/St Symphorien 363.4 km
Spa 363.9 km
Trier/Petrisberg 366.1 km
Weiskirchen/Saar 368.3 km
Aigle 368.9 km
Moléson 369.1 km