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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 - Vartholomio Distance
Andravida 11.6 km
Zakynthos Airport 36.8 km
Patras Araxos Airport 39.4 km
Cephalonia Airport 82.7 km
Methoni 119.1 km
Preveza 120.9 km
Kalamata 121.8 km
Tripoli Airport 137.5 km
Lamia 173.7 km
Ioannina 197.4 km
Nea Anchialos Airport 226.9 km
Larissa National Airport 228.7 km
Corfu 233.1 km
Sarandë 250.2 km
Kythira 258.8 km
Gjirokastër 260.3 km
Kozani 261.9 km
Elefsina Airport 262.5 km
Tanagra Airport 264.1 km
Kastoria Airport 269.9 km
Elliniko Airport 281.2 km
Tatoi Palace 288.9 km
Skiathos 290.5 km
Korçë 291.6 km
El Venizelos 302.5 km
Florina 305.0 km
Athens Airport 306.2 km
Bitola 332.4 km
Vlorë 333.3 km
Thessaloniki Airport 338.1 km
Kuçovë 339.8 km
Ohrid Airport 340.4 km
Ohrid St. Paul AP 342.4 km
Sazan 349.5 km
Prilep 363.4 km
Elbasan 366.7 km
Gevgelija 370.4 km
Santa Maria di Leuca 378.7 km
Skyros Airport 383.0 km
Milos Airport 383.5 km
Demir Kapija 386.9 km
Lazaropole 386.9 km
Yzberish 395.2 km
Tirana 396.0 km
Chania Intl. Airport 404.3 km
Peshkopi 407.9 km
Durrës 409.4 km
Pozharane 417.3 km
Štip 418.0 km
Syros Airport 419.5 km
Lecce 421.5 km
Serres 423.1 km
Skopje-Petrovec 429.5 km
Berovo 439.2 km
Sandanski 445.3 km
Paros Airport 445.3 km
Mykonos 463.9 km
Brindisi/Casale 465.9 km
Naxos Airport 470.6 km
Naxos 470.8 km
Crotone 475.7 km
Tympaki Airport 489.5 km
Santorini 493.5 km
Lemnos Airport 496.2 km
Kavala/Chrisoupolis 496.4 km
Grottaglie 507.3 km
Heraklion Airport 512.7 km
Kastelli Airport 533.8 km
Kardzhali 605.0 km
Alexandroupolis Airport 607.7 km