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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 - Rostrenen Distance
Lorient South Brittany Airport 52.2 km
Saint-Brieuc Armor 60.2 km
Lannion Airport 60.3 km
Groix 68.5 km
Ploumanac'h 69.2 km
Morlaix/Ploujean 70.5 km
Landivisiau 100.4 km
Quimper 100.8 km
Le Talut 104.7 km
Brignogan-Plages 125.4 km
Guipavas 126.6 km
Lanvéoc/Poulmic 127.6 km
Penmarch 128.1 km
Dinard/Pleurtuit 142.7 km
Guernsey Airport 154.5 km
Pointe du Raz 161.1 km
Saint-Nazaire 162.8 km
Jersey Airport 164.2 km
Rennes- Saint-Jacques Airport 175.3 km
Ushant 196.8 km
Saint-Sauveur 201.6 km
Alderney Channel Is 205.4 km
Nantes Atlantique Airport 223.5 km
Cap de la Hague 224.4 km
Plymouth MtBatten 252.8 km
Cherbourg - Maupertus Airport 257.5 km
Isle of Portland 270.9 km
La Roche-sur-Yon 273.1 km
Exeter Airport 278.5 km
Laval Airport 285.5 km
North Wyke 289.3 km
Dunkeswell Airport 292.0 km
Cardinham 294.3 km
RNAS Culdrose 299.5 km
Newquay Airport 309.3 km
Angers 310.5 km
Camborne 314.4 km
Yeovil 316.4 km
Liscombe 318.4 km
Phare de Chassiron 321.4 km
Bournemouth 327.2 km
La Rochelle Airport 327.5 km
RM Chivenor 330.4 km
Caen 334.4 km
Angers 340.9 km
St. Catherine's Point 343.3 km
Cardiff Airport 351.6 km
St Athan 352.9 km
Bristol / Lulsgate 356.0 km
Southampton Airport 364.3 km
MoD Boscombe Down 369.0 km
Larkhill 369.8 km
Middle Wallop 377.4 km
Mumbles 378.0 km
Alencon/Valframbert 379.1 km
Scilly St Mary 382.6 km
Niort 386.9 km
Thorney Island 390.5 km
Le Mans/Arnage 391.0 km
RAF Lyneham 391.6 km
Sainte-Adresse 400.4 km
Le Havre/Octeville 403.4 km
Pembrey Burrows 404.7 km
Deauville-Saint-Gatien AP 405.9 km
Deauville-Saint-Gatien 406.0 km
Fairford Airport 418.8 km
RAF Odiham 424.9 km
Gloucestershire Airport 426.1 km
Sennybridge 427.4 km
Milford Haven 431.4 km
Credenhill 431.6 km
RAF Brize Norton 436.4 km
Cognac - Châteaubernard Air Base 438.0 km
Poitiers/Biard 440.8 km
Farnborough 441.2 km
RAF Little Rissington 441.3 km
Brighton City Airport 443.2 km
Shobdon 449.0 km
Benson 449.4 km
Aberporth 455.5 km
Tours/St Symphorien 456.8 km
Oxford Airport 457.4 km
Pershore 457.8 km
Cap Ferret 460.9 km
Trawscoed 462.4 km
Charlwood 470.8 km
High Wycombe 474.1 km
Gatwick Airport 475.0 km
Cazaux 477.0 km
Bordeaux/Merignac 477.4 km
Biscarrosse 480.6 km
Heathrow Airport 480.6 km
Angoulême - Cognac Intl. Airport 480.9 km
Northolt 487.0 km
Kenley 494.2 km
Herstmonceux 499.5 km
Birmingham Airport 500.3 km
Cosford 502.1 km
Lake Vyrnwy 502.3 km
Cosford 502.3 km