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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 - Megalopolis Distance
Tripoli Airport 32.7 km
Kalamata 36.8 km
Methoni 75.8 km
Andravida 108.7 km
Patras Araxos Airport 111.2 km
Zakynthos Airport 143.8 km
Kythira 151.1 km
Lamia 155.8 km
Elefsina Airport 171.9 km
Tanagra Airport 182.0 km
Elliniko Airport 184.4 km
Cephalonia Airport 196.4 km
Tatoi Palace 197.6 km
Nea Anchialos Airport 201.1 km
El Venizelos 205.5 km
Athens Airport 209.5 km
Preveza 218.7 km
Larissa National Airport 232.2 km
Skiathos 238.0 km
Milos Airport 270.7 km
Ioannina 280.7 km
Chania Intl. Airport 293.6 km
Kozani 301.9 km
Skyros Airport 306.7 km
Syros Airport 313.6 km
Kastoria Airport 329.3 km
Thessaloniki Airport 333.6 km
Paros Airport 335.4 km
Corfu 337.5 km
Sarandë 350.4 km
Gjirokastër 355.5 km
Mykonos 358.1 km
Florina 359.2 km
Naxos Airport 361.5 km
Naxos 361.9 km
Korçë 366.3 km
Tympaki Airport 378.4 km
Santorini 380.8 km
Bitola 386.9 km
Gevgelija 388.3 km
Heraklion Airport 399.6 km
Serres 408.6 km
Ohrid Airport 410.3 km
Prilep 411.3 km
Ohrid St. Paul AP 412.6 km
Demir Kapija 414.2 km
Kastelli Airport 420.7 km
Lemnos Airport 430.0 km
Kuçovë 432.0 km
Vlorë 434.5 km
Sandanski 444.4 km
Štip 448.5 km
Berovo 451.1 km
Elbasan 451.4 km
Sazan 452.6 km
Chios Airport 455.3 km
Lazaropole 457.1 km
Kavala/Chrisoupolis 457.7 km
Çeşme 472.7 km
Skopje-Petrovec 474.7 km
Pozharane 482.0 km
Peshkopi 482.9 km
Yzberish 484.4 km
Tirana 485.4 km
Santa Maria di Leuca 491.4 km
Sitia Airport 494.3 km
Durrës 503.9 km
Leros 520.0 km
Mytilene 525.1 km
Samos Airport 532.7 km
Lecce 533.2 km
Ayvalık 543.6 km
Alexandroupolis Airport 548.0 km
Çanakkale 550.0 km
Dikili 555.8 km
Kardzhali 563.0 km
Edirne 656.2 km