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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.


Estações Meteorológicas Próximas - Sesimbra Distância
Montijo 32.5 km
Lisboa/Geof 33.2 km
Lisboa 38.4 km
Aeroporto Humberto Delgado 40.1 km
Base Aérea de Sintra 51.9 km
Alverca do Ribatejo 52.1 km
Sines/Montes Chaos 58.4 km
Évora 136.0 km
Base Aérea de Beja 139.0 km
Beja 145.6 km
Sagres 156.8 km
Monte Real 157.9 km
Faro 200.3 km
Coimbra 204.0 km
Portalegre 212.0 km
Castelo Branco 239.6 km
Aeroporto de Badajoz 261.2 km
Huelva 275.8 km
Ovar Aeroporto 279.8 km
Ovar 280.2 km
Penhas Douradas 281.0 km
Viseu Airport 288.0 km
Porto/Pedras Rubras 313.5 km
Cáceres 330.8 km
Coria/Tabacoa 334.3 km
Vila Real Airport 351.1 km
Viana do Castelo 355.5 km
Rota 364.4 km
Dos Hermanas Aeroporto 367.8 km
Sevilha 375.4 km
Cádis 377.7 km
Plasencia 382.1 km
Jerez de la Frontera 386.1 km
San Fernando 389.5 km
Morón de la Frontera 413.9 km
Vitigudino 414.6 km
Vigo/Peinador 421.4 km
La Hoya 437.4 km
Hinojosa del Duque 445.4 km
Pontevedra 445.8 km
Ourense 453.1 km
Bragança 457.7 km
Tangier/Boukhalf Airport 464.6 km
Tarifa 473.7 km
Larache 487.4 km
Gibraltar 488.3 km
Salamanca 490.2 km
Santiago de Compostela 494.5 km
Aeroporto de Santiago-Rosalía de Castro 498.1 km
Ceuta 506.1 km
Samora 508.8 km
Sania Ramel Airport 524.2 km
Ponferrada 534.4 km
Rabat/Sale Airport 547.9 km
Benavente 552.2 km
Xexuão 554.6 km
Leão 600.4 km