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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 - Terni Distance
Rieti 27.0 km
Mont Terminillo 38.7 km
Pérouse 58.6 km
Guidonia Montecelio 62.2 km
Viterbe 68.3 km
Rome/Urbe 68.7 km
Vigna Di Valle 72.0 km
Ciampino 85.4 km
Aéroport Léonard-de-Vinci de Rome Fiumicino 95.1 km
Pratica di Mare 102.5 km
Frontone 103.6 km
Radicofani 104.8 km
Civitavecchia 107.8 km
Latina 113.8 km
Frosinone 124.4 km
Arezzo 132.3 km
Ancône/Falconara 139.0 km
Rimini 157.9 km
Monte Argentario 165.9 km
Pescara 173.1 km
San Giovanni Teatino 174.5 km
Grosseto 177.4 km
Ponza 182.2 km
Cervia 184.1 km
Forlì 189.1 km
Marina/Ravenne de point 208.4 km
Florence/Peretola 210.0 km
Grazzanise 227.7 km
Campobasso 247.5 km
Monte Calamita 251.1 km
Calamita 253.3 km
Naples/Capodichino 258.0 km
Bologne/Borgo 261.6 km
Termoli 268.7 km
Ferrare 272.2 km
Capri 278.3 km
Pise 280.2 km
Mont Cimone 280.3 km
Pula (Aéroport) 289.9 km
Mali Lošinj 293.6 km
Padua (Aéroport) 320.5 km
Venise-Marco-Polo (Aéroport) 320.7 km
Pazin 323.6 km
Aérodrome Salerne-Côte amalfitaine 328.1 km
Zadar 330.9 km
Trevico 331.0 km
Portorož Aéroport 333.1 km
Rab 334.6 km
Portorož 335.7 km
Trévise 339.2 km
Sarzana/Luni 339.9 km
Zadar (Aéroport) 343.3 km
Aérodrome de Foggia 343.7 km
Istrana 344.4 km
Alistro 348.5 km
Bastia-Poretta (Aéroport) 352.5 km
Zavizan 355.8 km
Trieste 355.9 km
Rijeka (Aéroport) 357.6 km
Amendola 359.1 km
Parme 360.1 km
Rijeka 360.1 km
Senj 361.9 km
Ronchi Legionari 364.4 km
Villafranca 365.6 km
Cap Corse 367.7 km
Solenzara 368.7 km
Gospić 370.6 km
Codroipo 372.6 km
Aviano Aéroport 376.1 km
City 377.6 km
Monte Sant'Angelo 378.6 km
Šibenik 384.8 km
Komiža 386.1 km
Postojna 386.7 km
Olbia 393.5 km
Parg 394.7 km
Vieste 398.0 km
Vojsko 399.8 km
Palagruža 400.4 km
Brescia (Aéroport) 405.1 km
Cap de Pertusato 407.6 km
Ogulin 409.6 km
Base aérienne de Ghedi 409.9 km
Figari 412.2 km
Kočevje 413.7 km
Plaisance 413.8 km
L'Île-Rousse 415.7 km
Passo Rolle 417.5 km
Split (Aéroport) 419.7 km
Vogel 421.9 km
Ustica 422.9 km
Topol pri Medvodah 427.0 km
Črnomelj 427.2 km
Hvar 427.9 km
Calvi/St Catherine 429.6 km
Paganella 429.9 km
Ljubljana 431.6 km
Marjan 432.5 km
Aéroport d'Ajaccio-Napoléon-Bonaparte 434.0 km