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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 - Chepstow Distance
Bristol (Aéroport) 28.5 km
Credenhill 52.2 km
Gloucestershire Aéroport 63.2 km
Yeovil 70.5 km
Shobdon 72.8 km
RAF Lyneham 76.4 km
Cardiff Aéroport 79.8 km
St Athan 89.2 km
Pershore 91.0 km
Fairford Aéroport 97.7 km
Dunkeswell (Aéroport) 107.1 km
Larkhill 107.8 km
RAF Little Rissington 111.3 km
MoD Boscombe Down 114.5 km
Sennybridge 116.2 km
Cosford 119.0 km
Cosford 119.0 km
Cosford 119.1 km
Liscombe 120.6 km
RAF Brize Norton 122.0 km
Île de Portland 126.5 km
Exeter Aéroport 129.2 km
Shawbury 129.7 km
Bournemouth 132.5 km
Middle Wallop 133.7 km
Birmingham Aéroport 138.0 km
Coleshill 144.6 km
Mumbles 146.8 km
Aéroport d'Oxford Kidlington 151.6 km
Lake Vyrnwy 152.8 km
Southampton Aéroport 162.9 km
Trawscoed 163.1 km
North Wyke 167.7 km
Église Lawford 169.1 km
Hawarden 174.1 km
Bala 174.5 km
Benson 174.6 km
Royal Marines Base Chivenor 176.1 km
Thorncliffe 182.9 km
Pembrey Burrows 189.5 km
Liverpool AP 190.1 km
St. Catherine's Point 191.8 km
Rostherne 194.6 km
Manchester 195.6 km
RAF Odiham 196.6 km
Midlands de l'Est Aéroport 199.9 km
Rhyl 203.6 km
High Wycombe 207.9 km
Crosby 212.3 km
Thorney Island 214.5 km
Farnborough 215.1 km
Plymouth MtBatten 215.4 km
Capel Curig 215.5 km
Aberporth 218.7 km
Nottingham/Watnall 219.4 km
Alderney Channel Is 219.4 km
Hague 228.3 km
Coal Aston Airfield 231.3 km
Cranfield Aéroport 233.4 km
Woburn 234.0 km
Warton Aerodrome (Aéroport) 236.0 km
Blackpool Aéroport 241.6 km
Guernesey Aéroport 244.8 km
Stonyhurst 245.7 km
Émetteur d'Emley Moor 246.6 km
Londres-Heathrow (Aéroport) 247.3 km
Northolt 249.5 km
Bedford 251.6 km
Cardinham 255.7 km
Londres-Luton (Aéroport) 257.3 km
Rothamsted Park 257.7 km
Cherbourg (Aéroport) 257.7 km
Bingley 258.1 km
Raf Mona 262.4 km
Aberdaron 263.1 km
Milford Haven 265.4 km
Wittering 268.6 km
Leeds-Bradford (Aéroport) 273.0 km
Jersey Aéroport 273.8 km
Vallée 274.7 km
Doncaster Aéroport 276.1 km
Charlwood 276.7 km
Barkston 276.9 km
Shoreham (Aéroport) 279.8 km
Londres-Gatwick (Aéroport) 281.6 km
St James's Park 282.6 km
Walney 283.6 km
Cranwell 286.7 km
Kenley 289.0 km
Newquay Cornouailles (Aéroport) 291.1 km
Waddington 293.9 km
Scampton 299.9 km
Biggin Hill 302.3 km
Londres-City (Aéroport) 302.8 km
Linton-Sur-Ouse 311.2 km
Shap 318.8 km
Topcliffe 319.3 km
Coningsby 321.7 km
Leeming 322.4 km
Cambridge 323.5 km