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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 - Sliven Distance
Sliven 0.0 km
Gorna Oryahovitsa Airport 82.9 km
Razgrad 92.0 km
Edirne 103.5 km
Giurgiu 128.1 km
Burgas 130.9 km
Burgas Airport 133.6 km
Kırklareli 137.9 km
Oltenița 144.8 km
Zimnicea 146.4 km
Zimnicea 146.4 km
Kardzhali 146.8 km
Alexandria 169.6 km
Bucharest 176.1 km
Varna Airport 177.0 km
Plovdiv 182.4 km
Videle 183.6 km
Lovech 184.2 km
Aurel Vlaicu Intl. Airport 186.1 km
Alexandroupolis Airport 187.0 km
Otopeni 189.6 km
Călăraşi 189.8 km
Varna 190.0 km
Turnu Măgurele 193.1 km
Roşiorii de Vede 206.7 km
Urziceni 208.2 km
Titu 215.1 km
Tekirdağ 216.2 km
Slobozia 221.8 km
Adamclisi 231.4 km
Ploieşti 231.7 km
Grivita 233.1 km
Çorlu 234.1 km
Feteşti 239.8 km
Târgovişte 247.3 km
Buzău 252.6 km
Çanakkale 252.9 km
Cernavodă 254.2 km
Kavala/Chrisoupolis 255.2 km
Stolnici 255.2 km
Câmpina 256.1 km
Caracal 261.5 km
Pătârlagele 265.2 km
Medgidia 265.9 km
Hârşova 271.7 km
Piteşti 272.2 km
Mangalia 277.1 km
Slatina 282.2 km
Valea Râmnicului 282.6 km
Sinaia (1500m) 283.6 km
Bechet 287.3 km
Bisoca 290.4 km
Penteleu 293.0 km
Mihail Kogălniceanu Airport 294.1 km
Omu 295.0 km
Mourgash 295.5 km
Predeal 295.7 km
Bandırma 296.5 km
Câmpulung 297.9 km
Fundata 300.5 km
Lemnos Airport 300.9 km
Constanța 300.9 km
Întorsura Buzăului 301.2 km
Casimcea 304.4 km
Deduleşti 305.9 km
Drăgăşani 306.7 km
Musala 308.2 km
Chiscani 308.5 km
Curtea de Argeş 312.0 km
Lacaut Mountain 315.0 km
Ghimbav 315.8 km
Focşani 315.9 km
Balıkesir Koca Seyit Airport 319.1 km
Craiova 319.4 km
Istanbul 324.9 km
Sfântu Gheorghe 325.6 km
Sofia 326.5 km
Râmnicu Vâlcea 326.6 km
Târgu Secuiesc 332.9 km
Kilyos 333.1 km
Tecuci 337.9 km
Ayvalık 338.1 km
Galați 338.1 km
Sarıyer 341.4 km
Serres 346.1 km
Bâlea Lake 350.8 km
Balıkesir 350.8 km
Baraolt 351.0 km
Umirea 352.2 km
Făgăraş 353.3 km
Adjud 354.7 km
Tulcea 356.9 km
Sandanski 357.8 km
Gura Portitei 359.1 km
Băileşti 359.7 km
Mytilene 360.1 km
Istanbul 360.3 km
Târgu Ocna 361.1 km
Dikili 363.2 km
Logreşti 366.1 km

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