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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 - Guernsey Distance
Guernsey Airport 0.0 km
Jersey Airport 50.6 km
Alderney Channel Is 54.6 km
Cap de la Hague 80.6 km
Saint-Brieuc Armor 103.9 km
Dinard/Pleurtuit 111.6 km
Ploumanac'h 117.3 km
Isle of Portland 121.6 km
Lannion Airport 122.8 km
Cherbourg - Maupertus Airport 128.1 km
Morlaix/Ploujean 164.1 km
Exeter Airport 170.5 km
Bournemouth 172.7 km
Dunkeswell Airport 173.9 km
Yeovil 174.3 km
Rennes- Saint-Jacques Airport 179.8 km
St. Catherine's Point 193.2 km
Plymouth MtBatten 197.9 km
Landivisiau 199.8 km
Lorient South Brittany Airport 203.2 km
North Wyke 207.1 km
Brignogan-Plages 210.2 km
Southampton Airport 210.9 km
Liscombe 214.5 km
MoD Boscombe Down 214.8 km
Larkhill 215.8 km
Bristol / Lulsgate 217.2 km
Groix 222.1 km
Middle Wallop 222.9 km
Guipavas 229.9 km
Cardiff Airport 233.4 km
St Athan 238.1 km
Quimper 238.2 km
RAF Lyneham 239.9 km
Saint-Nazaire 240.9 km
Caen 240.9 km
Thorney Island 241.9 km
Lanvéoc/Poulmic 242.0 km
Le Talut 247.5 km
RM Chivenor 251.8 km
Cardinham 258.9 km
Laval Airport 259.0 km
Fairford Airport 265.9 km
Penmarch 267.6 km
RAF Odiham 272.6 km
Nantes Atlantique Airport 276.9 km
Gloucestershire Airport 277.8 km
RAF Brize Norton 282.6 km
Mumbles 282.7 km
Pointe du Raz 283.9 km
RAF Little Rissington 288.3 km
Newquay Airport 289.2 km
Farnborough 289.9 km
Ushant 292.4 km
Benson 295.2 km
Credenhill 295.5 km
Sainte-Adresse 296.9 km
Le Havre/Octeville 298.9 km
Brighton City Airport 301.3 km
Oxford Airport 303.0 km
RNAS Culdrose 304.5 km
Saint-Sauveur 305.4 km
Deauville-Saint-Gatien 308.1 km
Deauville-Saint-Gatien AP 308.1 km
Pershore 308.7 km
Angers 310.1 km
Sennybridge 313.8 km
Camborne 314.7 km
Shobdon 314.9 km
Alencon/Valframbert 320.5 km
High Wycombe 320.7 km
Pembrey Burrows 321.0 km
Charlwood 325.3 km
Angers 329.1 km
Gatwick Airport 329.9 km
Heathrow Airport 330.3 km
La Roche-sur-Yon 332.9 km
Northolt 336.4 km
Kenley 348.3 km
Birmingham Airport 349.2 km
Le Mans/Arnage 353.6 km
Coleshill 354.3 km
Church Lawford 354.8 km
Trawscoed 356.6 km
Cosford 357.6 km
Cosford 358.1 km
Cosford 358.1 km
St James's Park 358.7 km
Biggin Hill 361.2 km
Herstmonceux 362.9 km
Rothamsted Park 363.3 km
Woburn 363.6 km
Cranfield Airport 367.4 km
Luton Airport 368.1 km
Milford Haven 371.2 km
Aberporth 371.4 km
London City Airport 374.1 km
Shawbury 374.5 km
Lake Vyrnwy 381.1 km
Bedford 389.2 km