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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.


Estaciones meteorológicas cercanas - Viana do Alentejo Distancia
Évora 24.7 km
Base Aérea de Beja 30.8 km
Beja 37.1 km
Sines/Montes Chaos 105.3 km
Montijo 121.9 km
Portalegre 123.3 km
Alverca do Ribatejo 130.0 km
Lisboa 134.2 km
Lisboa/Geof 134.8 km
Lisboa aeropuerto 135.7 km
Badajoz aeropuerto 145.0 km
Faro 145.2 km
Sintra Air Base — inglês 158.9 km
Huelva 168.1 km
Castelo Branco 175.2 km
Sagres 180.9 km
Monte Real 192.2 km
Coímbra 206.8 km
Cáceres 223.8 km
Penhas Douradas 235.2 km
Coria/Tabacoa 244.5 km
Dos Hermanas Aeropuerto 249.7 km
Sevilla 255.4 km
Rota 261.3 km
Viseu Airport 263.1 km
Cádiz 275.8 km
Jerez de la Frontera 277.3 km
Plasencia 284.7 km
San Fernando 287.5 km
Ovar 293.2 km
Ovar Aeropuerto 293.4 km
Morón de la Frontera 295.8 km
Hinojosa del Duque 321.6 km
Vila Real Airport 325.8 km
Oporto/Pedras Rubras 328.3 km
La Hoya 340.7 km
Vitigudino 344.7 km
Córdoba 355.2 km
Tangier/Boukhalf aeropuerto 370.4 km
Tarifa 371.3 km
Viana do Castelo 374.2 km
Gibraltar 381.2 km
Salamanca 401.4 km
Ceuta 402.0 km
Larache 405.3 km
Braganza 407.9 km
Tetuán-Sania Ramel aeropuerto 424.3 km
Málaga-Costa del Sol aeropuerto 432.7 km
Zamora 432.9 km
Vigo/Peinador 433.5 km
Andújar 439.3 km
Orense 441.3 km
Ávila 450.3 km
Pontevedra 457.3 km
Chauen 460.0 km
Ciudad Real 460.2 km
Jaén 470.7 km
Toledo 472.0 km
Almagro Aeropuerto 479.0 km
Benavente 482.4 km
Granada Aeropuerto 486.9 km
Ponferrada 489.8 km
Rabat/Sale aeropuerto 492.4 km
Santiago-Rosalía de Castro aeropuerto 503.9 km
Santiago de Compostela 504.2 km
Valladolid aeropuerto 511.8 km
Valladolid 514.0 km
Navacerrada 519.8 km
Segovia 520.3 km
Madrid-Cuatro Vientos aeropuerto 520.5 km
Base Aérea de Getafe 523.6 km
Madrid , University 530.6 km
Madrid , Retiro 533.3 km
León 537.7 km
Colmenar Viejo Aeropuerto 539.8 km
Madrid/Barajas 548.3 km
Madrid- Torrejón aeropuerto 559.6 km
Cherif Al Idrissi aeropuerto 578.8 km
Guadalajara 595.3 km
Taza Aeropuerto 637.1 km
Burgos / Villafria 660.1 km
Nador aeropuerto 665.9 km