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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 - Tatvan Distance
Siirt 60.9 km
Muş Airport 74.4 km
Muş 89.6 km
Van 115.4 km
Zakho 120.1 km
Ağrı Airport 125.4 km
Ağrı 132.0 km
Rabiah 140.6 km
Batman 140.8 km
Duhok 153.6 km
Erzurum 163.2 km
Qamishli 169.4 km
Tal Afar 175.2 km
Erzurum Airport 175.5 km
Hakkâri 179.5 km
Bingöl 192.6 km
Kars 192.7 km
Mardin Airport 200.4 km
Mosul 200.9 km
Ardahan 219.9 km
Armavir 223.4 km
Akre 225.6 km
Iğdır 226.9 km
Artvin 229.5 km
Hassakah 238.9 km
Diyarbakır 239.1 km
Maku 247.2 km
Amasia 253.2 km
Gyumri Shirak Intl. Airport 259.2 km
Hopa 260.3 km
Erbil Airport 267.8 km
Yerevan Zvartnots 268.3 km
Batumi 270.3 km
Akhaltsikhe 271.0 km
Ashtarak 271.1 km
Ashotsk 271.3 km
Salahadin 271.5 km
Bogus Soviet 272.4 km
Artashat 273.6 km
Bayburt 274.8 km
Aparan 286.1 km
Rize 291.1 km
Khoy 296.9 km
Kutaisi Airport 304.3 km
Vanadzor 304.7 km
Poti 310.3 km
Tunceli 310.7 km
Kutaisi 312.9 km
Mta-sabueti 318.0 km
Hrazdan 318.4 km
Urmia 319.1 km
Baiji 322.7 km
Erzincan 325.8 km
Elazığ 335.1 km
Zugdidi 337.0 km
Zugdidi 337.0 km
Kirkuk 338.0 km
Anah 342.1 km
Ambrolauri 343.6 km
Lake Sevan 344.2 km
Bolnisi 347.5 km
Gavar 348.7 km
Trabzon 350.7 km
Nakhchivan Airport 356.1 km
Gümüşhane 356.7 km
Haditha 358.0 km
Chamchamal 369.8 km
Ijevan 370.5 km
Tbilisi 380.8 km
Gap Meydan 388.7 km
Şanlıurfa GAP Airport 389.0 km
Tuz Khurmatu 391.1 km
Tbilisi Intl. Airport 391.4 km
Mahabad 404.4 km
Urfa 409.6 km
Sulaymaniyah 423.0 km
Sisian 423.6 km
Adıyaman 431.2 km
Maragheh 437.6 km
Tabriz Airport 444.6 km
Tulga Meydan 451.0 km
Kapan 465.1 km
Malatya/Erhac 468.3 km
Saqqez 476.0 km
Khanaqin 477.3 km
Ganja Airport 481.9 km
Giresun 482.4 km
Halabja 483.6 km
Giandscha 491.5 km
Zaqatala 546.2 km
Gunib 604.9 km

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