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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 - Guidonia Montecelio Απόσταση
Guidonia Montecelio 0.0 km
Rome/Urbe 26.5 km
Ciampino 28.9 km
Ριέτι 48.1 km
Pratica di Mare 50.6 km
Latina 52.3 km
Monte Terminillo 57.8 km
Vigna Di Valle 58.8 km
Αεροδρόμιο της Ρώμης-Φιουμιτσίνο 59.2 km
Φροζινόνε 74.6 km
Βιτέρμπο 89.5 km
Civitavecchia 100.3 km
Πόντσα 120.0 km
Περούτζα 120.5 km
Radicofani 145.5 km
Frontone 164.7 km
Πεσκάρα 169.9 km
San Giovanni Teatino 170.7 km
Monte Argentario 179.1 km
Grazzanise 180.6 km
Αρέτσο 187.4 km
Ancona/Falconara 189.0 km
Γκροσσέτο 202.7 km
Naples/Capodichino 211.3 km
Καμπομπάσσο 218.4 km
Ρίμινι 219.8 km
Κάπρι 226.5 km
Cervia 246.3 km
Φορλί 250.4 km
Τέρμολι 252.3 km
Firenze/Peretola 259.9 km
Point Marina/Ravenna 270.6 km
Monte Calamita 271.8 km
Calamita 273.8 km
Salerno Costa d'Amalfi Airport 284.7 km
Trevico 296.6 km
Foggia "Gino Lisa" Airport 317.8 km
Bologna/Borgo 318.6 km
Πίζα 319.6 km
Monte Cimone 329.2 km
Φερράρα 332.4 km
Mali Lošinj 335.2 km
Amendola 335.9 km
Pula Airport 340.9 km
Alistro 357.4 km
Ζάνταρ 358.7 km
Monte Sant'Angelo 359.2 km
Ούστικα 360.6 km
Bastia - Poretta Airport 366.8 km
Zadar Airport 369.4 km
Solenzara 371.2 km
Ραμπ 374.8 km
Pazin 376.1 km
Όλμπια 377.7 km
Sarzana/Luni 381.3 km
Vieste 382.2 km
Padua Airport 382.3 km
Αεροδρόμιο Μάρκο Πόλο της Βενετίας 382.9 km
Portorož Airport 389.3 km
Cap Corse 389.6 km
Komiža 390.1 km
Portorož 392.3 km
Παλαγκρούζα 393.0 km
Zavizan 394.2 km
Σίμπενικ 400.6 km
Capo Pertusato 401.2 km
Τρεβίζο 401.4 km
Gospić 402.2 km
Senj 402.7 km
Αεροδρόμιο της Ριέκα 403.6 km
Capo Bellavista 405.1 km
Istrana 406.6 km
Ριέκα 408.1 km
Figari 408.4 km
Πάρμα 410.8 km
Τεργέστη 411.4 km
Falcone Borsellino Airport 416.8 km
Latronico 419.9 km
Ronchi Legionari 422.1 km
Villafranca 423.3 km
Αεροδρόμιο του Σπλιτ 430.4 km
L'Île-Rousse 430.5 km
Χβαρ 432.4 km
Codroipo 432.8 km
City 434.4 km
Bonifati 437.5 km
Ajaccio Napoleon Bonaparte Airport 437.6 km
Αβιάνο Αεροδρόμιο 437.8 km
Postojna 438.9 km
Capo S. Lorenzo 440.5 km
Marjan 442.0 km
Parg 442.3 km
Calvi/St Catherine 442.7 km
Ogulin 449.4 km
Vojsko 455.0 km
Kočevje 459.6 km
Brescia Airport 459.8 km
Bari/Palese Macchie 460.4 km
Πιατσέντσα 461.4 km
Μπίχατς 463.9 km