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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 - Tonnarella Distance
Messina 50.9 km
Reggio Calabria 61.5 km
Catania/Fontanarosa 70.1 km
Naval Air Station Sigonella 79.7 km
Enna 108.5 km
Gela 148.5 km
Lamezia Terme 153.1 km
Cozzo Spadaro 154.1 km
Bonifati 180.4 km
Prizzi 190.9 km
Monte Scuro 194.8 km
Ustica 223.3 km
Falcone Borsellino Airport 223.7 km
Sciacca 229.1 km
Latronico 234.3 km
Crotone 238.4 km
Luqa/Malta 253.4 km
Salerno Costa d'Amalfi Airport 270.0 km
Capri 280.6 km
Trapani 291.2 km
Naples/Capodichino 311.3 km
Trevico 315.5 km
Marina di Ginosa 317.1 km
Grazzanise 336.3 km
Gioia del Colle 349.3 km
Foggia "Gino Lisa" Airport 359.3 km
Grottaglie 362.4 km
Amendola 373.0 km
Bari/Palese Macchie 373.3 km
Campobasso 374.5 km
Pantelleria 375.8 km
Ponza 385.6 km
Monte Sant'Angelo 396.6 km
Lampedusa 396.8 km
Santa Maria di Leuca 403.6 km
Lecce 407.7 km
Brindisi/Casale 416.8 km
Termoli 417.6 km
Vieste 421.3 km
Frosinone 429.1 km
Latina 444.4 km
Kelibia Airport 467.7 km
San Giovanni Teatino 473.8 km
Pescara 475.6 km
Palagruža 475.6 km
Pratica di Mare 483.8 km
Ciampino 485.3 km
Guidonia Montecelio 495.4 km
Rome/Urbe 505.7 km
Fiumicino Airport 510.1 km
Monte Terminillo 525.5 km
Rieti 528.6 km
Sazan 530.1 km
Mahdia 531.1 km
Vigna Di Valle 535.9 km
Lastovo 536.6 km
Vlorë 548.1 km
Civitavecchia 558.5 km
Corfu 559.3 km
Viterbo 577.4 km
Neum 583.3 km
Dubrovnik 586.3 km
Durrës 590.7 km
Dubrovnik Airport 590.9 km
Kuçovë 605.5 km
Tivat 609.6 km
Bar 613.3 km
Tirana 623.2 km
Yzberish 624.8 km
Yzberish 624.8 km
Monte Argentario 636.9 km
Radicofani 637.0 km
Podgorica 646.2 km
Shkodër 646.4 km
Podgorica 653.3 km
Nikšić 654.6 km
Grosseto 673.7 km