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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 - Grono Distance
Grono 1.6 km
San Bernardino 24.1 km
Matro 30.7 km
Locarno Airport 31.7 km
Comprovasco 33.2 km
Monte Generoso 38.4 km
Lugano Airport 38.5 km
Cimetta 40.3 km
Locarno/Monti 41.2 km
Stabio 43.0 km
Tinizong-Rona 50.5 km
Vicosoprano 54.4 km
Piz Martegnas 55.5 km
Ilanz 58.1 km
Piotta 59.7 km
Disentis/Sedrun 60.1 km
Cevio 61.4 km
Crap Masegn 65.2 km
Sils im Engadin/Segl 71.0 km
Valbella 71.4 km
Lago di Robièi 73.9 km
Naetschen 73.9 km
Elm 74.1 km
Hospental 76.0 km
Piz Corvatsch 76.4 km
Chur-Ems 80.2 km
Milan Malpensa Airport 82.7 km
Glarus 86.6 km
Samedan Airport 87.4 km
Linate Airport 87.6 km
Orio al Serio Intl. Airport 88.4 km
Altdorf 91.5 km
Bad Ragaz Airport 92.9 km
Novara / Cameri 96.9 km
Weissfluhjoch 97.2 km
Grimsel-Hospiz 97.4 km
Ulrichen 97.8 km
Bernina 98.4 km
Schiers 98.4 km
Titlis 98.9 km
Davos 98.9 km
Kraftwerk Robbia 102.0 km
Engelberg 103.6 km
Vaduz 104.7 km
Einsiedeln 106.5 km
Lachen 107.2 km
Binn 107.5 km
Säntis 112.1 km
Ebnat-Kappel 112.5 km
Brand 113.7 km
Buochs Airport 116.7 km
Wädenswil 118.3 km
Eggishorn 119.3 km
Meiringen 121.4 km
Alpnach Airport 122.8 km
Feldkirch 123.3 km
Hörnli 124.8 km
Giswil 125.6 km
Lucerne 128.0 km
Cham 128.4 km
Pilatus 128.6 km
Buffalora 131.8 km
Emmen Airport 132.1 km
St. Gallen 132.1 km
Jungfraujoch 134.0 km
Tänikon 137.9 km
Dübendorf Airport 138.1 km
Naluns / Schlivera 138.5 km
Scuol 139.5 km
Galtür 139.6 km
Zürich 140.1 km
Rheineck-Altenrhein 142.6 km
Thal 143.2 km
Dornbirn 144.8 km
Visp 145.6 km
Grächen 146.3 km
Santa Maria Val Müstair 147.2 km
Reckenholz 147.4 km
Schüpfheim 148.1 km
Blatten 148.9 km
Güttingen 149.2 km
Mosen 149.6 km
Interlaken 149.9 km
Zurich-Kloten 151.6 km
Monte Rosa-Plattje 152.1 km
Bregenz 152.4 km
Idalpe 152.8 km
Alberschwende 153.1 km
Ghedi Air Base 153.4 km
Galzig 154.2 km
Salen-Reutenen 154.6 km
Gornergrat 154.7 km
Konstanz 156.9 km
Zermatt 157.4 km
Napf 158.3 km
Warth 159.0 km
Lägern 159.3 km
Brescia Airport 159.3 km
Sigmarszell - Zeisertsweiler 160.1 km
Piacenza 160.2 km