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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.


Poblíž povětrnostní stanice - Helsinky Vzdálenost
Vanhakaupunki 1.0 km
Töölö 6.9 km
Letiště Helsinky-Vantaa 15.3 km
Rajamäki 46.3 km
Nurmijärvi 47.8 km
Mantsala Hirvihaara 53.8 km
Vihti 66.5 km
Porvoo Kilpilahti 68.1 km
Kirkkonummi Makiluoto 71.4 km
Kallbadagrund 74.7 km
Porvoo Emasalo 76.1 km
Porvoo 76.7 km
Tallinn 89.1 km
Lammi 90.1 km
Hämeenlinna 98.5 km
Lohja 100.6 km
Bagaskar 106.6 km
Lahti 110.8 km
Hattula 118.4 km
Kuusiku 123.6 km
Pulkkilanharju Lighthouse 127.5 km
Pakri 128.3 km
Türi 145.6 km
Kiikala (Letiště) 147.9 km
Tammisaari Jussaro 157.3 km
Heinola 160.5 km
Luhanka Judinsalo 166.7 km
Pernaja Orrengrund 167.3 km
Halli 170.8 km
Halli (Letiště) 171.6 km
Jokioinen 174.4 km
Nigula 176.5 km
Väike-Maarja Parish 176.6 km
Pärnu (Letiště) 184.6 km
Juupajoki 185.2 km
Tampere 187.9 km
Kunda (Port) 189.7 km
Hanko Tvarminne 192.2 km
Viljandi 195.1 km
Tampere 198.1 km
Salo 205.6 km
Anjala 213.8 km
Leivonmäki 214.1 km
Jõgeva 216.2 km
Rankki 225.4 km
Russarö 226.3 km
Virtsu 229.0 km
Hanko 229.5 km
Utti 232.7 km
Rūjiena 234.5 km
Kihnu 237.8 km
Jyväskylä 239.1 km
Ainaži 241.6 km
Kotka Haapasaari 248.9 km
Ähtäri 253.1 km
Mustvee 258.2 km
Kärdla (Letiště) 264.5 km
Piikkiö 268.0 km
Valga 268.1 km
Virrat Aijanneva 269.5 km
Tartu 272.7 km
Jõhvi 285.1 km
Priekuļi 290.5 km
Mikkeli 293.6 km
Skulte 296.0 km
Turku 300.8 km
Virolahti 305.2 km
Alajärvi 305.5 km
Ruhnu 306.7 km
Dragsf Jard Vano 308.4 km
Kokemäki 309.8 km
Turku Artukainen 309.9 km
Viitasaari 310.5 km
Turku Rajakari 318.4 km
Vesanto 322.5 km
Zosēni 322.8 km
Zosēni 322.8 km
Kankaanpää 325.2 km
Niinisalo 325.3 km
Võru 327.1 km
Kuressaare Letiště 335.8 km
Halsua Kanala Purola 336.3 km
Riga Letiště 339.3 km
Ristna 345.4 km
Seinäjoki 349.3 km
Vaasa Klemettila 349.6 km
Gdov 351.3 km
Mērsrags 353.2 km
Skrīveri 356.0 km
Alūksne 358.6 km
Kolka 359.2 km
Madona 360.6 km
Narva 361.4 km
Fagerholm 361.9 km
Gulbene 362.0 km
Lappeenranta 366.9 km
Kauhava 367.7 km
Pyhajarvi Ol Ojakyla 368.8 km
Juva 369.2 km
Lappeenranta 373.4 km

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