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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 - Sarnen Distance
Alpnach Airport 6.2 km
Giswil 8.7 km
Pilatus 9.2 km
Lucerne 15.7 km
Buochs Airport 16.4 km
Engelberg 19.8 km
Meiringen 20.6 km
Emmen Airport 22.1 km
Titlis 24.2 km
Schüpfheim 27.0 km
Napf 36.4 km
Grimsel-Hospiz 37.9 km
Mosen 37.9 km
Cham 39.7 km
Egolzwil 41.2 km
Altdorf 41.4 km
Ulrichen 44.0 km
Hospental 47.3 km
Jungfraujoch 48.7 km
Interlaken 49.2 km
Naetschen 49.2 km
Langnau im Emmental 49.6 km
Eggishorn 55.0 km
Buchs 56.4 km
Lago di Robièi 57.8 km
Binn 59.2 km
Wädenswil 59.5 km
Obergösgen 59.6 km
Einsiedeln 61.9 km
Brugg-Wildegg 63.1 km
Zürich 63.3 km
Piotta 64.1 km
Wynau 64.7 km
Reckenholz 65.3 km
Lägern 66.4 km
Disentis/Sedrun 70.5 km
Dübendorf Airport 70.6 km
Blatten 71.1 km
Zurich-Kloten 71.3 km
Rünenberg 71.6 km
Beznau 72.4 km
Lachen 74.4 km
Cevio 74.9 km
Koppigen 75.7 km
Wimmis 75.8 km
Leibstadt 77.1 km
Visp 79.9 km
Bern-Belp 83.5 km
Möhlin 84.9 km
Wut�schingen-Ofteringen 87.1 km
Adelboden 87.9 km
Zollikofen 88.1 km
Grächen 90.3 km
Comprovasco 90.4 km
Hallau 91.2 km
Glarus 92.1 km
Matro 92.4 km
Hörnli 93.3 km
Schaffhausen 96.2 km
Tänikon 96.9 km
Cimetta 97.8 km
Grenchen 97.9 km
Locarno/Monti 100.0 km
Boltigen 101.1 km
Binningen 102.5 km
Elm 103.0 km
Crap Masegn 103.7 km
Ebnat-Kappel 103.8 km
Lenzkirch 106.4 km
Locarno Airport 107.0 km
Ilanz 108.3 km
Mühleberg 108.5 km
Crans-Montana 110.1 km
Gstaad-Skiarea 110.7 km
Zermatt 110.8 km
Feldberg 110.9 km
Delémont 111.9 km
EuroAirport Basel Mulhouse Freiburg 112.3 km
Gornergrat 113.5 km
San Bernardino 114.3 km
Monte Rosa-Plattje 114.7 km
Singen 114.9 km
Salen-Reutenen 119.1 km
Evolène 119.8 km
Müllheim 121.2 km
Geisingen 122.0 km
Pian Rosa 122.3 km
Lugano Airport 122.9 km
Grono 124.0 km
Sion Airport 127.0 km
Fribourg Posieux 127.3 km
Säntis 128.4 km
Villingen-Schwenningen 128.9 km
Stabio 131.3 km
Château-d'Œx 132.0 km
Freiburg Airport 132.2 km
Les Diablerets 132.5 km
Cressier 133.6 km
Chasseral 134.2 km
Fey 135.0 km

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