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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 - Sapanca Distância
Adapazarı 19.3 km
Cengiz Topel Naval Air Station 43.9 km
Bilecik 61.3 km
Yenişehir Airport 88.6 km
Yenişehir Airport 92.5 km
Esquiceir Aeroporto 92.6 km
Düzce 101.2 km
Istanbul / Sabiha Gokcen 108.6 km
Yalova Aeroporto 109.5 km
Istambul 125.6 km
Kütahya 125.8 km
Sarıyer 140.5 km
Bursa 142.1 km
Kilyos 147.8 km
Bolu 148.7 km
Zafer Havaalani 151.8 km
Istambul 163.7 km
Zonguldaque 185.7 km
Zonguldaque 185.7 km
Afyonkarahisar 188.0 km
Afyonkarahisar 190.8 km
Uşak 215.9 km
Bartın 247.2 km
Akşehir 257.1 km
Bandırma 258.5 km
Mürted Airfield Command 262.3 km
Çorlu 265.2 km
Suleyman Demirel 272.0 km
Ankara / Etimesgut 278.5 km
Baliquesir 281.4 km
Isparta 283.4 km
Guvercinlik 285.5 km
Burdur 290.0 km
Ankara Central 299.5 km
Tekirdağ 303.8 km
Ankara/Esenboğa 309.0 km
Denizli 309.9 km
Akhisar 319.2 km
Kırklareli 352.9 km
Cihanbeyli 355.5 km
Varna 356.2 km
Mangalia 356.6 km
Burgas 356.9 km
Aeroporto Internacional de Burgas 357.3 km
Cônia 362.2 km
Varna Airport 367.9 km
Muratpaşa 369.3 km
Antália 369.7 km
Kırıkkale 370.5 km
Çankırı 373.0 km
Manisa 374.3 km
Balıkesir Koca Seyit Airport 378.5 km
Aidim 385.2 km
Constança 386.9 km
Castamonu 396.7 km
Muğla 397.4 km
Dikili 407.7 km
Mihail Kogălniceanu Aeroporto 408.1 km
Esmirna 409.0 km
İnebolu 410.2 km
Medgidia 412.1 km
Gura Portitei 412.5 km
Sfântu Gheorghe 413.3 km
Fethiye 413.5 km
Dalaman 418.1 km
Aeroporto de Esmirna-Adnan Menderes 418.1 km
Adamclisi 418.6 km
Ayvalık 419.5 km
Çiğli Air Base 420.0 km
Finike 421.9 km
Edirne 423.0 km
Umirea 424.5 km
Cernavodă 433.5 km
Marmaris 433.7 km
Çanakkale 433.8 km
Kuşadası 433.9 km
Mitilene 437.8 km
Kaş 437.8 km
Alânia 438.5 km
Milas- Bodrum Airport 443.4 km
Castelorizo 447.4 km
Casimcea 447.8 km
Feteşti 448.1 km
Kırşehir 457.5 km
Caramânia 465.3 km
Hârşova 466.5 km
Călăraşi 473.6 km
Aksaray 473.6 km
Bodrum 474.3 km
Samos Aeroporto 474.4 km
Gazipaşa Aeroporto 477.5 km
Sliven 480.7 km
Rhodes/Paradissi 482.0 km
Datça 484.0 km
Slobozia 495.3 km
Çeşme 499.5 km
Razgrad 505.5 km
Nevşehir Kapadokya Airport 507.9 km
Yozgat 511.2 km
Quios Aeroporto 514.6 km