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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 - Petergof Distance
Pulkovo Airport 45.2 km
Siversky 57.6 km
Shlisselburg 122.5 km
Nikolaevskoe 127.6 km
Vyborg 153.0 km
Kingisepp 153.2 km
Lyuban 157.0 km
Parikkala Koitsanlahti 158.7 km
Valaam 179.6 km
Joutseno 186.5 km
Punkaharju Airport 196.8 km
Sortavala 198.3 km
Arkazha 199.3 km
Dno 199.5 km
Narva 204.8 km
Lappeenranta 220.2 km
Lappeenranta 225.1 km
Savonlinna 226.2 km
Tohmajärvi 231.8 km
Staraya Russa 238.4 km
Kirishi 241.1 km
Virolahti 255.8 km
Gdov 255.9 km
Liperi Tuiskavanluoto 258.5 km
Rantasalmi Rukkasluoto 258.7 km
Pskov 264.0 km
Krenitsy 269.9 km
Joensuu 270.2 km
Jõhvi 283.7 km
Juva 297.7 km
Kholm 298.5 km
Puskinskie Gory 299.5 km
Ilomantsi Mekrijarvi 301.1 km
Kotka Haapasaari 304.9 km
Rankki 329.9 km
YamskayaSloboda 331.1 km
Lieksa 331.8 km
Juuka 332.6 km
Opochka 334.4 km
Ilomantsi Pötsönvaara 337.6 km
Mustvee 342.9 km
Utti 344.9 km
Mikkeli 347.8 km
Suoyarvi 347.9 km
Velikiye Luki 349.0 km
Anjala 353.0 km
Demyansk 356.2 km
Olonets 358.8 km
Kuopio Ritoniemi 360.6 km
Rautavaara Yla-luosta 366.2 km
Kunda (Port) 374.6 km
Võru 377.6 km
Toropets 378.1 km
Kuopio 384.7 km
Tartu 385.1 km
Pernaja Orrengrund 385.9 km
Valtimo 385.9 km
Kuopio 387.1 km
Reboly 392.9 km
Alūksne 399.1 km
Jõgeva 405.6 km
Tikhvin 406.9 km
Lodeynoye Pole 413.9 km
Väike-Maarja Parish 414.8 km
Maaninka 429.4 km
Velizh 433.3 km
Rēzekne 439.5 km
Ostashkov 443.1 km
Gulbene 445.2 km
Polotsk 446.8 km
Heinola 447.7 km
Verkhnyadzvinsk 451.7 km
Vitebsk 460.7 km
Borovichi 466.3 km
Leivonmäki 466.7 km
Porvoo Emasalo 476.0 km
Valga 477.4 km
Kallbadagrund 478.8 km
Vaasa Klemettila 479.9 km
Porvoo 480.4 km
Porvoo Kilpilahti 486.1 km
Lahti 486.8 km
Vierema Kaarakkala 488.5 km
Vesanto 492.3 km
Viljandi 501.4 km
Padany 505.9 km
Madona 506.2 km
Pulkkilanharju Lighthouse 506.2 km
Türi 510.0 km
Bely 511.8 km
Sharkawshchyna 518.5 km
Zosēni 520.4 km
Zosēni 520.4 km
Luhanka Judinsalo 521.1 km
Mantsala Hirvihaara 529.1 km
Daugavpils 529.1 km
Jyväskylä 530.8 km
Rūjiena 541.2 km
Viitasaari 548.3 km
Zīlāni 553.0 km