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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.


Poblíž povětrnostní stanice - Rennes Vzdálenost
Rennes- Saint-Jacques (Letiště) 0.3 km
Dinard/Pleurtuit 68.4 km
Saint-Nazaire 96.7 km
Nantes Atlantique (Letiště) 102.9 km
Laval Letiště 110.3 km
Saint-Brieuc Armor 134.7 km
Jersey Letiště 138.1 km
Angers 140.7 km
La Roche-sur-Yon 157.0 km
Saint-Sauveur 166.1 km
Angers 167.9 km
Cherbourg - Maupertus (Letiště) 178.6 km
Guernsey (Letiště) 180.1 km
Lorient South Brittany (Letiště) 183.0 km
Cap de la Hague 184.9 km
Le Talut 186.3 km
Caen 189.4 km
Alderney Channel Is 190.8 km
Groix 202.0 km
Lannion Letiště 207.4 km
Alencon/Valframbert 208.1 km
Ploumanac'h 210.9 km
Le Mans/Arnage 215.7 km
La Rochelle Letiště 218.6 km
Phare de Chassiron 227.6 km
Morlaix/Ploujean 239.4 km
Niort 244.9 km
Sainte-Adresse 256.1 km
Deauville-Saint-Gatien (Letiště) 256.2 km
Deauville-Saint-Gatien 256.3 km
Le Havre/Octeville 259.9 km
Quimper 271.2 km
Landivisiau 274.1 km
Poitiers/Biard 280.2 km
Tours/St Symphorien 282.5 km
Portland 284.0 km
St. Catherine's Point 284.2 km
Penmarch 294.6 km
Brignogan-Plages 297.4 km
Guipavas 301.7 km
Bournemouth 302.5 km
Lanvéoc/Poulmic 302.8 km
Cognac - Châteaubernard Air Base 310.2 km
Southampton Letiště 317.5 km
Thorney Island 318.9 km
Aérodrome de Blois 330.7 km
Pointe du Raz 334.0 km
Angoulême/Brie-Champniers 339.2 km
Yeovil 341.3 km
Middle Wallop 343.6 km
MoD Boscombe Down 344.9 km
Evreux/Fauville 345.0 km
Châteaudun 346.9 km
Brighton City (Letiště) 347.7 km
Larkhill 348.7 km
Exeter Letiště 350.5 km
Dunkeswell (Letiště) 353.1 km
Rouen/Boos 356.2 km
Chartres 362.7 km
RAF Odiham 363.8 km
Plymouth MtBatten 367.9 km
Ouessant 372.1 km
Farnborough 373.8 km
Dieppe 377.7 km
Bordeaux/Merignac 378.4 km
Charlwood 381.2 km
RAF Lyneham 383.4 km
Letiště London Gatwick 384.1 km
Bristol / Lulsgate 384.8 km
North Wyke 385.1 km
Cap Ferret 385.8 km
Herstmonceux 388.4 km
Orléans 389.0 km
Romorantin-Lanthenay 389.8 km
Liscombe 394.6 km
Cazaux 398.8 km
Benson 401.7 km
Fairford (Letiště) 402.3 km
Kenley 404.0 km
Letiště London Heathrow 405.8 km
Limoges/Bellegarde 406.6 km
Biscarrosse 408.1 km
Châteauroux 409.1 km
RAF Brize Norton 411.2 km
Cardiff Letiště 411.4 km
Northolt 412.5 km
Biggin Hill 413.1 km
High Wycombe 415.7 km
St Athan 416.8 km
Oxford (Letiště) 422.1 km
RAF Little Rissington 422.2 km
St. James's Park 422.2 km
Cardinham 424.1 km
Trappes 424.7 km
Gloucestershire Letiště 428.3 km
RM Chivenor 429.9 km
Letiště London 430.6 km
Toussus-le-Noble 434.2 km
Cormeilles 434.3 km
Lydd (Letiště) 438.1 km