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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 - Jomala Distance
Mariehamn / Aland Island 4.9 km
Jomala 13.7 km
Nyhamn 22.2 km
Lumparland Langnas Harbour 48.1 km
Söderarm 65.3 km
Märket 83.1 km
Svenska Högarna 84.0 km
Svenska Högarna 84.6 km
Bogskär 86.7 km
Kumlinge 98.9 km
Kustavi Isokari 141.0 km
Svanberga 141.3 km
Stavsnäs 157.2 km
Örskär 170.0 km
Utö 173.1 km
Rauma Kylmapihlaja 190.5 km
Gotska Sandön 198.7 km
Fagerholm 204.1 km
Stockholm Observatory 217.4 km
Film 219.1 km
Stockholm Arlanda Airport 219.8 km
Stockholm 220.4 km
Harsfjarden 225.7 km
Pori Tahkoluoto 228.1 km
Stockholm Bromma Airport 234.0 km
Tullinge 239.8 km
Turku Rajakari 249.3 km
Uppsala University 250.4 km
Uppsala 253.7 km
Pori 254.2 km
Pori 255.1 km
Farosund-Ar 255.7 km
Kristinestad Lighthouse 258.6 km
Turku Artukainen 259.3 km
Dragsf Jard Vano 260.6 km
Eggegrund 263.3 km
Landsort 267.0 km
Turku 269.9 km
Adelsö 274.3 km
Ristna 276.4 km
Vilsandi 284.2 km
Kokemäki 299.1 km
Piikkiö 299.9 km
Oestergarnsholm 300.8 km
Gävle 306.7 km
Kuggoren 306.9 km
Strömmingsbådan 310.9 km
Visby 311.0 km
Enköping 311.3 km
Bramon 320.8 km
Kerstinbo 321.2 km
Korsnas Bredskaret 325.3 km
Lungo 328.5 km
Skagsudde 332.2 km
Sõrve peninsula 336.9 km
Kankaanpää 338.2 km
Niinisalo 339.0 km
Hanko 341.1 km
Ventspils 341.8 km
Jarnasklubb 344.5 km
Russarö 345.5 km
Ventspils Intl. Airport 345.5 km
Kauhajoki 349.0 km
Kärdla Airport 351.2 km
Sala 355.2 km
Kuressaare Airport 355.3 km
Örnsköldsvik Airport 355.6 km
Skavasta/Stockholm 358.7 km
Vastmarkum 361.8 km
Salo 362.1 km
Stockholm Västerås Airport 365.5 km
Sundsvall/Harnosand 367.0 km
Valsörarna 367.5 km
Vaasa Airport 368.5 km
Pāvilosta 370.5 km
Harstena 375.4 km
Hanko Tvarminne 377.8 km
Umeå Airport 384.4 km
Kramfors Airport 384.7 km
Eskilstuna 388.7 km
Hoburg 389.8 km
Åmot 391.8 km
Kolka 393.2 km
Hemling 396.0 km
Holmöarna 397.5 km
Floda 403.1 km
Liepāja 403.3 km
Jokioinen 410.3 km
Delsbo 410.4 km
Ylistaro 410.9 km
Tammisaari Jussaro 414.0 km
Kiikala Airport 422.3 km
Seinäjoki 423.0 km
Kolmarden-Stromsfors 424.6 km
Olands Norra Udde 425.7 km
Stende 429.0 km
Tampere 434.0 km
Norrköping Airport 435.4 km
Virtsu 436.3 km
Norrköping 445.7 km