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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.


Estações Meteorológicas Próximas - Çatalca Distância
Istambul 44.6 km
Çorlu 59.4 km
Kilyos 65.7 km
Sarıyer 68.7 km
Istambul 81.9 km
Bandırma 97.9 km
Istanbul / Sabiha Gokcen 98.7 km
Tekirdağ 101.5 km
Yalova Aeroporto 104.0 km
Bursa 116.7 km
Kırklareli 147.1 km
Yenişehir Airport 150.0 km
Yenişehir Airport 151.4 km
Baliquesir 161.7 km
Cengiz Topel Naval Air Station 164.0 km
Burgas 170.9 km
Aeroporto Internacional de Burgas 174.1 km
Bilecik 194.8 km
Varna 209.8 km
Edirne 215.8 km
Varna Airport 215.9 km
Adapazarı 221.8 km
Balıkesir Koca Seyit Airport 224.2 km
Akhisar 229.2 km
Kütahya 240.2 km
Çanakkale 249.3 km
Mangalia 261.2 km
Uşak 262.6 km
Ayvalık 267.0 km
Dikili 268.6 km
Esquiceir Aeroporto 270.3 km
Zafer Havaalani 272.2 km
Manisa 273.6 km
Sliven 280.8 km
Alexandrópolis Aeroporto 283.6 km
Mitilene 291.0 km
Adamclisi 293.2 km
Constança 300.4 km
Esmirna 303.2 km
Medgidia 303.8 km
Düzce 304.0 km
Çiğli Air Base 305.3 km
Mihail Kogălniceanu Aeroporto 314.4 km
Cernavodă 316.6 km
Aeroporto de Esmirna-Adnan Menderes 316.8 km
Razgrad 322.6 km
Feteşti 322.7 km
Călăraşi 324.8 km
Afyonkarahisar 328.4 km
Aidim 330.7 km
Afyonkarahisar 334.8 km
Denizli 336.0 km
Kardzhali 346.8 km
Kuşadası 349.7 km
Gura Portitei 350.9 km
Casimcea 351.2 km
Hârşova 351.6 km
Oltenița 352.2 km
Bolu 353.2 km
Slobozia 355.1 km
Umirea 356.4 km
Gorna Oryahovitsa Airport 363.6 km
Çeşme 369.6 km
Zonguldaque 374.0 km
Zonguldaque 374.0 km
Grivita 376.0 km
Lemnos Aeroporto 378.4 km
Quios Aeroporto 379.6 km
Samos Aeroporto 381.6 km
Tulcea 383.8 km
Suleyman Demirel 384.2 km
Muğla 385.2 km
Sfântu Gheorghe 386.6 km
Giurgiu 389.0 km
Mahmudia 390.4 km
Milas- Bodrum Airport 394.5 km
Burdur 397.6 km
Maliuc 400.6 km
Chiscani 402.4 km
Isparta 403.9 km
Urziceni 405.0 km
Bucareste 415.8 km
Sulina 416.0 km
Bodrum 418.8 km
Plovdiv 423.3 km
Aeroporto Internacional Aurel Vlaicu 424.6 km
Zimnicea 425.4 km
Otopeni 426.1 km
Akşehir 426.6 km
Galați 427.5 km
Kavala/Chrisoupolis 428.9 km
Buzău 431.2 km
Leros 432.2 km
Bartın 434.8 km
Alexandria 444.6 km
Valea Râmnicului 446.3 km
Videle 449.1 km
Lovech 460.1 km
Ploieşti 465.9 km
Focşani 467.9 km