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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 - Guer Distance
Rennes- Saint-Jacques Airport 46.6 km
Saint-Nazaire 65.6 km
Dinard/Pleurtuit 76.2 km
Nantes Atlantique Airport 100.8 km
Saint-Brieuc Armor 107.8 km
Saint-Sauveur 135.6 km
Lorient South Brittany Airport 138.1 km
Le Talut 139.9 km
Jersey Airport 146.8 km
Laval Airport 153.6 km
Groix 156.5 km
La Roche-sur-Yon 156.5 km
Angers 173.7 km
Lannion Airport 177.5 km
Guernsey Airport 178.8 km
Ploumanac'h 182.6 km
Alderney Channel Is 202.3 km
Cap de la Hague 203.1 km
Angers 204.4 km
Morlaix/Ploujean 204.6 km
Cherbourg - Maupertus Airport 207.6 km
La Rochelle Airport 217.4 km
Phare de Chassiron 220.6 km
Quimper 228.5 km
Caen 234.1 km
Landivisiau 237.1 km
Penmarch 250.7 km
Alencon/Valframbert 253.8 km
Le Mans/Arnage 257.9 km
Niort 259.9 km
Brignogan-Plages 261.7 km
Lanvéoc/Poulmic 262.6 km
Guipavas 263.2 km
Pointe du Raz 291.7 km
Isle of Portland 293.4 km
Sainte-Adresse 301.3 km
Deauville-Saint-Gatien AP 302.0 km
Deauville-Saint-Gatien 302.1 km
Le Havre/Octeville 305.0 km
Poitiers/Biard 306.3 km
St. Catherine's Point 312.1 km
Cognac - Châteaubernard Air Base 319.3 km
Tours/St Symphorien 320.6 km
Bournemouth 322.3 km
Ushant 332.9 km
Southampton Airport 343.2 km
Exeter Airport 346.6 km
Yeovil 349.6 km
Thorney Island 350.5 km
Dunkeswell Airport 352.1 km
Plymouth MtBatten 352.5 km
Angoulême - Cognac Intl. Airport 355.1 km
MoD Boscombe Down 365.7 km
Middle Wallop 366.7 km
Larkhill 368.8 km
Aérodrome de Blois 371.4 km
North Wyke 375.4 km
Cap Ferret 376.1 km
Bordeaux/Merignac 376.7 km
Brighton City Airport 385.0 km
Châteaudun 390.1 km
Cazaux 390.3 km
Liscombe 390.5 km
Evreux/Fauville 391.3 km
Bristol / Lulsgate 393.1 km
RAF Odiham 393.8 km
Biscarrosse 397.9 km
RAF Lyneham 401.1 km
Rouen/Boos 402.7 km
Cardinham 405.2 km
Farnborough 405.4 km
Chartres 407.5 km
Cardiff Airport 412.1 km
St Athan 416.5 km
Charlwood 417.7 km
RM Chivenor 420.0 km
Gatwick Airport 420.9 km
Fairford Airport 422.4 km
Dieppe 423.6 km
RNAS Culdrose 425.5 km
Newquay Airport 427.0 km
Romorantin-Lanthenay 428.4 km
Herstmonceux 429.1 km
Benson 429.2 km
Limoges/Bellegarde 431.3 km
Orléans 431.7 km
RAF Brize Norton 433.5 km
Heathrow Airport 439.4 km
Camborne 439.4 km
Kenley 440.8 km
RAF Little Rissington 443.2 km
Gloucestershire Airport 444.1 km
Châteauroux 444.5 km
High Wycombe 445.8 km
Northolt 446.1 km
Oxford Airport 446.9 km
Biggin Hill 450.6 km
Bergerac/Roumanier 451.3 km
Mumbles 457.5 km
St James's Park 458.0 km