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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 - Tryavna Distance
Gorna Oryahovitsa Airport 37.1 km
Zimnicea 81.5 km
Zimnicea 81.5 km
Lovech 91.2 km
Sliven 93.1 km
Plovdiv 111.5 km
Giurgiu 112.0 km
Turnu Măgurele 112.4 km
Alexandria 112.9 km
Kardzhali 123.2 km
Razgrad 131.5 km
Roşiorii de Vede 136.9 km
Videle 142.3 km
Bucharest 168.4 km
Edirne 168.8 km
Oltenița 175.0 km
Aurel Vlaicu Intl. Airport 176.9 km
Caracal 178.0 km
Titu 179.6 km
Otopeni 181.4 km
Stolnici 188.3 km
Bechet 196.7 km
Slatina 203.9 km
Mourgash 204.1 km
Târgovişte 207.5 km
Alexandroupolis Airport 207.5 km
Piteşti 211.8 km
Kavala/Chrisoupolis 214.7 km
Ploieşti 216.4 km
Kırklareli 223.6 km
Burgas 223.8 km
Musala 224.3 km
Urziceni 225.8 km
Burgas Airport 226.1 km
Drăgăşani 229.7 km
Câmpina 230.0 km
Craiova 233.6 km
Sofia 236.6 km
Deduleşti 240.3 km
Călăraşi 243.6 km
Câmpulung 247.8 km
Sinaia (1500m) 250.0 km
Curtea de Argeş 250.8 km
Râmnicu Vâlcea 257.6 km
Fundata 259.2 km
Omu 259.7 km
Varna Airport 261.4 km
Pătârlagele 264.4 km
Predeal 265.3 km
Băileşti 268.7 km
Slobozia 268.7 km
Buzău 271.8 km
Grivita 273.6 km
Varna 275.2 km
Serres 282.0 km
Sandanski 282.2 km
Ghimbav 284.2 km
Logreşti 285.0 km
Întorsura Buzăului 287.6 km
Çanakkale 291.4 km
Penteleu 292.0 km
Bâlea Lake 293.1 km
Tekirdağ 295.4 km
Lemnos Airport 298.2 km
Polovragi 299.2 km
Bisoca 300.1 km
Adamclisi 300.1 km
Feteşti 301.2 km
Sfântu Gheorghe 303.4 km
Valea Râmnicului 304.6 km
Făgăraş 305.6 km
Calafat 306.1 km
Dimitrovgrad 306.5 km
Voineasa 308.7 km
Lacaut Mountain 311.7 km
Bâcleş 311.9 km
Boița 312.8 km
Vidin 316.0 km
Berovo 317.3 km
Cernavodă 319.0 km
Çorlu 319.5 km
Târgu Secuiesc 320.7 km
Baraolt 323.0 km
Hârşova 328.8 km
Târgu Jiu 331.7 km
Păltiniş 331.8 km
Obarsia Lotrului 333.1 km
Sibiu 334.4 km
Medgidia 335.4 km
Focşani 339.1 km
Petrila 341.5 km
Odorheiu Secuiesc 345.7 km
Petroşani 349.7 km
Miercurea Ciuc 352.3 km
Dumbrăveni 353.7 km
Chiscani 355.9 km
Mangalia 356.4 km
Negotin 356.6 km
Kriva Palanka 359.0 km
Târgu Ocna 363.5 km

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