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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.


Stations météo à proximité - Ümraniye Distance
Sarıyer 9.3 km
Kilyos 17.2 km
Istanbul 21.6 km
Istanbul / Sabiha Gokcen 28.9 km
Istanbul 40.5 km
Yalova Aéroport 47.7 km
Cengiz Topel Naval Air Station 87.9 km
Bursa 92.9 km
Yenişehir (Aéroport) 96.8 km
Yenişehir (Aéroport) 97.2 km
Bilecik 131.6 km
Çorlu 137.3 km
Adapazarı 145.0 km
Bandırma 154.0 km
Tekirdağ 178.7 km
Kütahya 190.6 km
Balıkesir 202.1 km
Eskişehir Aéroport 204.6 km
Kırklareli 221.3 km
Zafer Havaalani 223.8 km
Düzce 226.3 km
Bourgas 228.8 km
Bourgas (Aéroport) 230.1 km
Uşak 239.5 km
Varna 243.1 km
Varna (Aéroport) 252.8 km
Akhisar 260.7 km
Mangalia 268.9 km
Bolu 275.7 km
Afyonkarahisar 276.9 km
Afyonkarahisar 282.3 km
Balıkesir Koca Seyit (Aéroport) 283.9 km
Edirne 292.3 km
Zonguldak 296.6 km
Zonguldak 296.6 km
Constanța 305.4 km
Manisa 312.0 km
Adamclisi 317.6 km
Medgidia 319.7 km
Çanakkale 321.6 km
Dikili 323.1 km
Mihail Kogălniceanu Aéroport 323.4 km
Denizli 325.9 km
Ayvalık 326.9 km
Cernavodă 337.2 km
Suleyman Demirel 344.6 km
Izmir 344.9 km
Gura Portitei 346.4 km
Feteşti 347.8 km
Mytilène 349.2 km
Sliven 349.7 km
Çiğli Air Base 350.7 km
Aydın 352.3 km
Umirea 354.9 km
Aéroport Adnan-Menderes 357.0 km
Bartın 357.6 km
Burdur 360.0 km
Alexandroúpoli Aéroport 361.0 km
Isparta 361.9 km
Călăraşi 362.4 km
Casimcea 362.8 km
Akşehir 367.7 km
Sfântu Gheorghe 368.6 km
Hârşova 372.1 km
Razgrad 380.0 km
Kuşadası 384.0 km
Mahmudia 384.6 km
Tulcea 386.0 km
Slobozia 388.6 km
Muğla 392.0 km
Maliuc 393.1 km
Mürted Airfield Command 393.4 km
Sulina 396.3 km
Oltenița 402.4 km
Grivita 409.7 km
Ankara / Etimesgut 409.8 km
Bodrum-Milas (Aéroport) 416.0 km
Guvercinlik 416.8 km
Samos Aéroport 420.2 km
Chiscani 421.2 km
Tchesmé 422.6 km
Kardjali 424.2 km
Ankara Central 430.6 km
Gorna Oryahovitsa (Aéroport) 431.4 km
Chios Aéroport 434.7 km
Ankara/Esenboğa 439.4 km
Galați 443.0 km
Bodrum 443.5 km
Giurgiu 448.9 km
Urziceni 449.0 km
Lemnos Aéroport 452.3 km
Léros 468.2 km
Buzău 469.1 km
Bucarest 469.3 km
Aéroport international Aurel-Vlaicu 477.3 km
Otopeni 478.3 km
Valea Râmnicului 479.6 km
Konya 484.5 km
Cihanbeyli 484.8 km
Zimnicea 491.1 km