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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 - Chirpan Distance
Kardzhali 55.5 km
Plovdiv 65.3 km
Gorna Oryahovitsa Airport 104.5 km
Lovech 116.5 km
Sliven 119.0 km
Zimnicea 147.0 km
Zimnicea 147.0 km
Edirne 147.3 km
Kavala/Chrisoupolis 147.4 km
Alexandroupolis Airport 150.3 km
Turnu Măgurele 164.1 km
Alexandria 178.9 km
Giurgiu 180.9 km
Razgrad 188.7 km
Musala 194.8 km
Roşiorii de Vede 195.4 km
Mourgash 196.3 km
Videle 210.6 km
Kırklareli 216.6 km
Caracal 220.6 km
Sofia 221.8 km
Bechet 223.1 km
Serres 227.7 km
Lemnos Airport 230.1 km
Oltenița 237.2 km
Bucharest 237.5 km
Çanakkale 238.6 km
Sandanski 239.3 km
Burgas 241.2 km
Burgas Airport 245.5 km
Stolnici 245.8 km
Aurel Vlaicu Intl. Airport 246.1 km
Titu 248.0 km
Otopeni 250.7 km
Slatina 251.3 km
Craiova 269.4 km
Piteşti 272.0 km
Târgovişte 274.7 km
Tekirdağ 274.9 km
Drăgăşani 277.4 km
Berovo 280.8 km
Ploieşti 285.9 km
Băileşti 290.0 km
Urziceni 292.2 km
Varna Airport 295.8 km
Deduleşti 296.7 km
Călăraşi 299.0 km
Câmpina 299.0 km
Dimitrovgrad 299.3 km
Çorlu 306.5 km
Varna 308.5 km
Curtea de Argeş 309.5 km
Râmnicu Vâlcea 311.2 km
Câmpulung 311.5 km
Thessaloniki Airport 314.1 km
Sinaia (1500m) 317.8 km
Calafat 321.7 km
Balıkesir Koca Seyit Airport 323.8 km
Fundata 325.3 km
Logreşti 326.0 km
Omu 327.1 km
Slobozia 327.3 km
Ayvalık 327.6 km
Vidin 330.5 km
Gevgelija 333.0 km
Predeal 333.5 km
Pătârlagele 333.6 km
Kriva Palanka 334.0 km
Grivita 334.6 km
Bâcleş 338.3 km
Buzău 338.4 km
Skyros Airport 339.9 km
Mytilene 343.8 km
Polovragi 344.9 km
Bandırma 347.9 km
Adamclisi 348.1 km
Ghimbav 352.1 km
Demir Kapija 352.4 km
Bâlea Lake 352.7 km
Feteşti 353.5 km
Štip 353.6 km
Întorsura Buzăului 357.1 km
Dikili 357.2 km
Voineasa 358.7 km
Penteleu 361.3 km
Skiathos 367.6 km
Târgu Jiu 368.2 km
Bisoca 368.4 km
Boița 368.4 km
Făgăraş 369.1 km
Cernavodă 369.5 km
Valea Râmnicului 370.9 km
Sfântu Gheorghe 372.4 km
Negotin 372.5 km
Obarsia Lotrului 378.6 km
Lacaut Mountain 381.1 km
Vranje 382.0 km
Păltiniş 383.0 km
Medgidia 383.1 km
Hârşova 383.6 km