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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 - Treillières Vzdálenost
Nantes Atlantique (Letiště) 20.9 km
Saint-Nazaire 57.2 km
La Roche-sur-Yon 76.5 km
Rennes- Saint-Jacques (Letiště) 82.4 km
Saint-Sauveur 103.7 km
Angers 116.4 km
Laval Letiště 127.4 km
La Rochelle Letiště 138.3 km
Phare de Chassiron 145.6 km
Dinard/Pleurtuit 146.6 km
Angers 151.0 km
Le Talut 174.6 km
Niort 179.4 km
Saint-Brieuc Armor 188.8 km
Lorient South Brittany (Letiště) 195.3 km
Groix 208.9 km
Le Mans/Arnage 216.5 km
Jersey Letiště 218.3 km
Alencon/Valframbert 230.1 km
Poitiers/Biard 232.6 km
Cognac - Châteaubernard Air Base 237.6 km
Caen 245.4 km
Lannion Letiště 256.4 km
Guernsey (Letiště) 256.4 km
Cherbourg - Maupertus (Letiště) 258.6 km
Ploumanac'h 262.1 km
Tours/St Symphorien 264.9 km
Cap de la Hague 267.1 km
Alderney Channel Is 272.1 km
Angoulême/Brie-Champniers 274.4 km
Morlaix/Ploujean 279.3 km
Quimper 289.2 km
Bordeaux/Merignac 298.3 km
Deauville-Saint-Gatien (Letiště) 303.3 km
Deauville-Saint-Gatien 303.5 km
Cap Ferret 303.7 km
Penmarch 306.8 km
Sainte-Adresse 307.7 km
Landivisiau 308.7 km
Le Havre/Octeville 311.8 km
Cazaux 316.9 km
Aérodrome de Blois 321.0 km
Biscarrosse 326.0 km
Lanvéoc/Poulmic 328.5 km
Guipavas 332.1 km
Brignogan-Plages 334.3 km
Châteaudun 347.4 km
Pointe du Raz 351.9 km
Limoges/Bellegarde 355.0 km
St. Catherine's Point 363.8 km
Portland 365.2 km
Bergerac/Roumanier 369.7 km
Evreux/Fauville 370.1 km
Romorantin-Lanthenay 371.5 km
Chartres 372.7 km
Châteauroux 381.0 km
Bournemouth 384.4 km
Orléans 386.6 km
Rouen/Boos 389.3 km
Thorney Island 395.8 km
Southampton Letiště 397.9 km
Ouessant 399.5 km
Mont-de-Marsan 401.5 km
Dax 410.6 km
Brighton City (Letiště) 418.2 km
Guéret Letiště 421.0 km
Dieppe 421.3 km
Yeovil 422.3 km
Brive-la-Gaillarde 424.4 km
Middle Wallop 424.8 km
Exeter Letiště 426.0 km
MoD Boscombe Down 426.7 km
Dunkeswell (Letiště) 430.3 km
Biarritz/Anglet 430.5 km
Larkhill 430.6 km
Agen/La Garenne 431.6 km
Brive- Souillac (Letiště) 432.4 km
Plymouth MtBatten 434.2 km
Trappes 438.2 km
Ciboure 438.3 km
RAF Odiham 441.7 km
San Sebastian / Fuenterrabia 442.3 km
Gourdon 444.9 km
Toussus-le-Noble 446.9 km
Bourges 448.1 km
San Sebastian / Igueldo 450.1 km
Farnborough 450.5 km
Herstmonceux 452.4 km
Charlwood 452.6 km
Cormeilles 453.9 km
Letiště London Gatwick 455.1 km
North Wyke 456.6 km
Villacoublay/Velizy 457.3 km
Pau Pyrénées (Letiště) 460.9 km
RAF Lyneham 465.5 km
Bristol / Lulsgate 465.9 km
Punta Galea Golf 466.0 km
Elgoibar 466.6 km
Liscombe 470.1 km
Bilbao/Sondica 470.1 km