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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 - Grächen Distance
Grächen 1.4 km
Viège 13.2 km
Zermatt 19.2 km
Gornergrat 22.7 km
Monte Rosa-Plattje 25.1 km
Blatten 26.2 km
Pian Rosa 30.8 km
Evolène 37.0 km
Eggishorn 39.4 km
Crans-Montana 43.4 km
Jungfraujoch 43.7 km
Binn 44.6 km
Adelboden 45.8 km
Interlaken 54.1 km
Sion Aéroport 56.1 km
Fey 63.1 km
Les Attelas 63.5 km
Ulrichen 63.6 km
Wimmis 68.3 km
Boltigen 69.7 km
Grimsel-Hospiz 69.9 km
Meiringen 71.1 km
Les Diablerets 71.8 km
la Vallée d'Aoste (Aéroport) 73.1 km
Col du Grand-Saint-Bernard 81.5 km
Lago di Robièi 81.5 km
Langnau im Emmental 83.5 km
Giswil 83.5 km
Château-d'Œx 83.9 km
Schüpfheim 86.5 km
Cevio 87.0 km
Gstaad-Skiarea 88.8 km
Berne-Belp 89.0 km
Evionnaz 89.8 km
Napf 91.3 km
Titlis 92.4 km
Engelberg 95.3 km
Hospental 96.7 km
Alpnach Aéroport 97.7 km
Zollikofen 98.1 km
Le Moléson 99.2 km
Pilatus 99.6 km
Naetschen 101.2 km
Piotta 101.5 km
Fribourg Posieux 103.1 km
Aigle 103.4 km
Buochs Aéroport 105.9 km
Locarno/Monti 106.2 km
Koppigen 106.3 km
Cardada 106.7 km
Mühleberg 106.9 km
Lucerne 107.1 km
Turin/Caselle 110.1 km
Le Bouveret 111.1 km
Egolzwil 111.5 km
Emmen Aéroport 113.1 km
Locarno Aéroport 116.3 km
Oron 116.7 km
Milan Malpensa (Aéroport) 116.7 km
Altdorf 117.1 km
Wynau 117.8 km
Novara/Cameri 118.3 km
Granges 119.3 km
Payerne 121.0 km
Lugano Aéroport 121.1 km
Turin-Aeritalia (Aéroport) 123.7 km
Matro 124.0 km
Mosen 125.1 km
Stabio 125.6 km
Comprovasco 126.4 km
Turin/Bric Della Croce 127.3 km
Disentis/Sedrun 127.3 km
Cressier 128.6 km
Obergösgen 131.0 km
Cham 131.2 km
Villars-Tiercelin 134.1 km
Bourg-Saint-Maurice 134.7 km
Pully 134.8 km
Monte Generoso 134.8 km
Chaumont 134.8 km
Buchs 135.2 km
Chasseral 135.2 km
Neuchâtel 137.4 km
Rünenberg 138.0 km
Delémont 139.7 km
Brugg-Wildegg 146.3 km
Einsiedeln 146.6 km
Wädenswil 148.0 km
Grono 148.3 km
Mathod 152.3 km
Binningen 152.3 km
La Chaux-de-Fonds 152.7 km
Möhlin 153.2 km
San Bernardino 153.5 km
Zurich 154.8 km
Lägern 156.5 km
Reckenholz 156.9 km
La Fretaz 157.6 km
Beznau 157.9 km
Lachen 158.3 km