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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 - Le Grand-Bornand Distance
Annecy Airport 34.6 km
Geneva Airport 47.4 km
Bourg-Saint-Maurice 52.4 km
Nyon (Changins) 55.9 km
La Dôle 64.8 km
Bière 66.0 km
Chambery/Aix Bains 68.1 km
Pully 69.8 km
Le Bouveret 70.6 km
Aigle 71.1 km
Evionnaz 73.3 km
Villars-Tiercelin 82.8 km
Great St Bernard 84.3 km
Oron 86.1 km
Mathod 92.3 km
Moléson 95.2 km
Les Attelas 96.6 km
Les Diablerets 97.8 km
Fey 98.6 km
Château-d'Œx 100.6 km
Grenonble Lvd Airport 101.0 km
La Fretaz 101.9 km
Aosta Valley Airport 106.3 km
Sion Airport 106.5 km
Payerne 113.4 km
Briançon 115.4 km
La Brévine 118.2 km
Fribourg Posieux 120.8 km
Ambérieu-en-Bugey 121.3 km
Crans-Montana 123.0 km
Evolène 123.2 km
Neuchâtel 123.6 km
Gstaad-Skiarea 130.8 km
Boltigen 132.0 km
La Chaux-de-Fonds 133.8 km
Alpes 136.6 km
Chaumont 138.3 km
Cressier 142.4 km
Adelboden 142.5 km
Pian Rosa 143.7 km
Zermatt 149.1 km
Mühleberg 149.7 km
Lyon- Saint-Exupéry Airport 150.8 km
Chasseral 151.1 km
Embrun 151.5 km
Gornergrat 152.5 km
Besançon 153.2 km
Monte Rosa-Plattje 155.7 km
Wimmis 158.3 km
Torino/Caselle 159.2 km
Grächen 160.7 km
Turin-Aeritalia Airport 161.9 km
Bern-Belp 162.3 km
Visp 163.9 km
Tavaux 165.0 km
Zollikofen 165.1 km
Dole Tavaux 165.1 km
Blatten 165.6 km
Lyon- Bron Airport 166.2 km
Fahy 176.2 km
Grenchen 176.9 km
Turin / Bric della Croce 177.1 km
Interlaken 181.2 km
Mâcon 184.5 km
Koppigen 186.2 km
Jungfraujoch 187.2 km
Delémont 188.0 km
Dorans 189.2 km
Langnau im Emmental 190.5 km
Eggishorn 194.4 km
Binn 203.2 km
Cuneo Intl. Airport 204.4 km
Luxeuil-les-Bains 205.1 km
Napf 206.8 km
Flughafen Dijon-Bourgogne 209.0 km
Schüpfheim 209.9 km
Wynau 210.5 km
Château-Arnoux-Saint-Auban Airport 212.1 km
Meiringen 214.1 km
Ulrichen 219.8 km
Binningen 220.1 km
EuroAirport Basel Mulhouse Freiburg 221.2 km
Giswil 221.8 km
Egolzwil 224.0 km
Grimsel-Hospiz 224.5 km
Mondovì 231.5 km
Rünenberg 232.6 km
Obergösgen 234.5 km
Pilatus 234.7 km
Alpnach Airport 236.1 km
Montélimar 239.8 km
St Etienne/Boutheon 240.5 km
Lago di Robièi 240.6 km
Monte Malanotte 241.4 km
Titlis 242.0 km
Lucerne 242.3 km
Engelberg 242.7 km
Langres Airport 243.3 km
Möhlin 243.4 km
Colmar 245.0 km