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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.


Stations météo à proximité - Saint-Hélier Distance
Jersey Aéroport 13.5 km
Alderney Channel Is 60.7 km
Hague 61.6 km
Guernesey Aéroport 63.9 km
Dinard/Pleurtuit 66.8 km
Cherbourg (Aéroport) 85.8 km
Saint-Brieuc Armor 111.8 km
Rennes-Bretagne (Aéroport) 129.9 km
Île de Portland 153.8 km
Ploumanac'h 158.8 km
Lannion Aéroport 161.4 km
St. Catherine's Point 178.5 km
Bournemouth 180.2 km
Caen 181.8 km
Laval Aéroport 196.7 km
Morlaix/Ploujean 203.6 km
Southampton Aéroport 205.6 km
Saint-Nazaire 208.4 km
Yeovil 211.1 km
Lorient-Bretagne-Sud (Aéroport) 211.4 km
Thorney Island 222.8 km
MoD Boscombe Down 223.8 km
Middle Wallop 226.2 km
Larkhill 226.6 km
Dunkeswell (Aéroport) 226.6 km
Exeter Aéroport 227.0 km
Groix 232.2 km
Nantes-Atlantique (Aéroport) 232.3 km
Landivisiau 241.5 km
Sainte-Adresse 241.9 km
Le Havre/Octeville 244.3 km
Le Talut 245.1 km
Angers 250.4 km
Deauville-Saint-Gatien 251.3 km
Deauville-Saint-Gatien AP 251.3 km
Bristol (Aéroport) 254.7 km
Brignogan-Plages 256.6 km
Alençon/Valframbert 257.0 km
RAF Lyneham 258.3 km
RAF Odiham 261.5 km
Plymouth MtBatten 261.6 km
Aéroport d'Angers-Loire 267.4 km
North Wyke 268.1 km
Quimper 268.1 km
Liscombe 270.4 km
Shoreham (Aéroport) 271.8 km
Guipavas 272.2 km
Farnborough 275.9 km
Saint-Sauveur 277.6 km
Fairford Aéroport 279.9 km
Lanvéoc/Poulmic 281.3 km
Cardiff Aéroport 283.3 km
La Roche-sur-Yon 287.1 km
St Athan 289.3 km
Le Mans/Arnage 289.8 km
RAF Brize Norton 292.0 km
Benson 292.5 km
Penmarch 297.1 km
Charlwood 300.3 km
RAF Little Rissington 301.0 km
Gloucestershire Aéroport 301.5 km
Londres-Gatwick (Aéroport) 304.4 km
Aéroport d'Oxford Kidlington 307.2 km
Royal Marines Base Chivenor 312.3 km
High Wycombe 312.7 km
Londres-Heathrow (Aéroport) 313.6 km
Northolt 320.1 km
Pointe du Raz 321.5 km
Cardinham 322.8 km
Kenley 323.8 km
Herstmonceux 327.8 km
Pershore 330.1 km
Credenhill 332.3 km
Biggin Hill 335.6 km
St James's Park 337.6 km
Mumbles 339.0 km
Ouessant 339.3 km
La Rochelle Aéroport 348.8 km
Rothamsted Park 349.4 km
Londres-City (Aéroport) 350.5 km
Shobdon 352.6 km
Newquay Cornouailles (Aéroport) 353.0 km
Londres-Luton (Aéroport) 355.2 km
Woburn 355.9 km
Phare de Chassiron 356.9 km
Cranfield Aéroport 360.6 km
Église Lawford 363.1 km
Sennybridge 363.2 km
Dieppe 364.1 km
Rouen/Boos 364.3 km
Birmingham Aéroport 365.5 km
Royal Naval Air Station Culdrose 367.2 km
Evreux/Fauville 367.8 km
Tours/St Symphorien 367.9 km
Coleshill 369.8 km
Niort 370.0 km
Camborne 377.8 km
Pembrey Burrows 379.3 km
Bedford 381.7 km
Cosford 384.4 km