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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 - Arcachon Distance
Cazaux 13.0 km
Cap Ferret 13.1 km
Biscarrosse 27.4 km
Bordeaux/Merignac 54.1 km
Dax 107.1 km
Mont-de-Marsan 107.7 km
Biarritz/Anglet 139.0 km
Cognac - Châteaubernard Air Base 145.2 km
Ciboure 152.7 km
Phare de Chassiron 158.5 km
San Sebastian / Fuenterrabia 160.9 km
Pau Pyrénées Airport 162.2 km
La Rochelle Airport 170.2 km
San Sebastian / Igueldo 180.4 km
Bergerac/Roumanier 184.6 km
Angoulême - Cognac Intl. Airport 192.8 km
Agen/La Garenne 199.6 km
Niort 202.7 km
Tarbes/Ossun 206.3 km
Ilundain 213.2 km
Elgoibar 214.5 km
Pamplona 216.9 km
Aérodrome d'Auch 220.9 km
La Roche-sur-Yon 229.8 km
Bilbao/Sondica 248.1 km
Punta Galea Golf 253.6 km
Vitoria-Gasteiz 264.0 km
Saint-Sauveur 264.3 km
Poitiers/Biard 267.9 km
Onton 269.6 km
Bardenas Reales 274.9 km
Logroño 278.9 km
Gourdon 282.2 km
Nantes Atlantique Airport 283.2 km
Montauban 288.4 km
Limoges/Bellegarde 290.7 km
Brive- Souillac Airport 294.7 km
Brive-la-Gaillarde 295.5 km
Muret - Lherm Aerodrome 298.2 km
Huesca 299.3 km
Toulouse/Blagnac 300.4 km
Saint-Girons 308.8 km
Arties 311.7 km
Saint-Nazaire 317.6 km
Angers 320.1 km
Santander 324.0 km
Santander / Parayas 329.6 km
Zaragoza 332.3 km
Angers 336.6 km
Soria 353.5 km
Bujaraloz 364.1 km
Aérodrome d'Albi 370.6 km
Tours/St Symphorien 373.7 km
Le Talut 374.7 km
Burgos / Villafria 376.7 km
Laval Airport 378.9 km
La Seu d'Urgell Airport 382.2 km
Guéret Airport 383.0 km
Rennes- Saint-Jacques Airport 386.3 km
Lleida 387.5 km
Le Mans/Arnage 394.5 km
Daroca 394.7 km
Aurillac 396.0 km
Castres-Mazamet Airport 400.0 km
Rodez- Aveyron Airport 403.4 km
Châteauroux 404.3 km
Calamocha 414.1 km
Carcassonne 414.8 km
Groix 425.1 km
Lorient South Brittany Airport 425.5 km
Aérodrome de Blois 426.5 km
Molina de Aragón 431.8 km
Romorantin-Lanthenay 432.3 km
Alencon/Valframbert 442.9 km
Dinard/Pleurtuit 449.8 km
Tortosa 463.8 km
Reus 466.2 km
Châteaudun 472.4 km
Saint-Brieuc Armor 472.4 km
Bourges 473.4 km
Teruel 478.6 km
Orléans 491.7 km
Perpignan/Rivesalte 493.7 km
Avord 498.7 km
Quimper 500.8 km
Guadalajara 500.9 km
Sabadell 501.2 km
Penmarch 502.2 km
Puerto de san Isidro 503.6 km
Chartres 516.2 km
Barcelona Airport 516.5 km
Barcelona 518.9 km
Cuenca 522.0 km
Gijón 522.7 km
Valladolid 524.2 km
Lannion Airport 524.8 km
Valladolid Airport 527.7 km
Segovia 528.7 km
Madrid- Torrejón Airport 530.4 km
Colmenar Viejo Airport 530.7 km