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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.


Estações Meteorológicas Próximas - Llangollen Distância
Bala 19.1 km
Lake Vyrnwy 22.9 km
Rhyl 35.9 km
Hawarden 53.9 km
Capel Curig 59.9 km
Crosby 72.5 km
Liverpool AP 76.1 km
Shawbury 85.1 km
Trawscoed 89.6 km
Shobdon 97.8 km
Sennybridge 100.6 km
Blackpool Aeroporto 100.8 km
Warton Aerodrome Airport 106.5 km
Raf Mona 112.2 km
Credenhill 118.3 km
Rostherne 123.9 km
Cosford 128.4 km
Cosford 128.4 km
Valley 128.7 km
Walney 131.0 km
Cosford 131.0 km
Manchester 133.8 km
Stonyhurst 144.3 km
Aberdaron 147.7 km
Aberporth 156.9 km
Thorncliffe 161.0 km
Mumbles 166.1 km
St Athan 171.6 km
Cardiff Aeroporto 172.8 km
Pembrey Burrows 173.1 km
St Bees Head 175.6 km
Pershore 177.8 km
Gloucester Aeroporto 182.7 km
Aeroporto da Ilha de Man 184.9 km
Keswick 187.2 km
Shap 190.7 km
Aeroporto de Bristol 190.7 km
Birmingham Aeroporto 195.5 km
Bingley 197.3 km
Coleshill 199.8 km
Emley Moor 208.2 km
Liscombe 208.4 km
Warcop Range 211.4 km
Dundrennan 216.1 km
Great Dun Fell 220.7 km
Aeroporto Internacional de Leeds Bradford 221.5 km
RM Chivenor 222.8 km
Coal Aston Airfield 224.6 km
RAF Lyneham 225.9 km
Carlisle 226.3 km
RAF Little Rissington 226.9 km
Milford Haven 228.7 km
Fairford Aeroporto 229.5 km
Midlands Orientais Aeroporto 232.9 km
Dunkeswell Airport 233.1 km
Yeovil 233.6 km
Nottingham/Watnall 241.1 km
Church Lawford 241.3 km
RAF Brize Norton 243.8 km
Exeter Aeroporto 245.9 km
North Wyke 248.4 km
Spadeadam II 252.6 km
Spadeadam 252.6 km
Leeming 257.9 km
Eskdalemuir 263.5 km
Oxford Airport 264.2 km
Larkhill 265.1 km
Topcliffe 265.6 km
Linton-On-Ouse 270.1 km
RAF West Freugh 271.1 km
MoD Boscombe Down 271.6 km
Doncaster Aeroporto 274.8 km
Teesside Intl. Airport 281.1 km
Albemarle 286.6 km
Middle Wallop 287.2 km
Redesdale Camp 288.8 km
Isle of Portland 291.1 km
Benson 297.4 km
Drumalbin 298.4 km
Bournemouth 298.5 km
Plymouth MtBatten 298.7 km
Aeroporto Internacional de Newcastle 300.3 km
Cardinham 305.4 km
Prestwick 313.2 km
Barkston 317.3 km
Dublin Aeroporto 319.9 km
Southampton Aeroporto 320.0 km
Scampton 321.5 km
High Wycombe 323.6 km
Waddington 323.7 km
Cranwell 324.4 km
Cranfield Airport 326.6 km
Charterhall 327.5 km
Newquay Airport 329.4 km
Belfast/Harbour 330.0 km
Woburn 330.3 km
Edinburgh Gogarbank 331.1 km
Wittering 331.2 km
Edimburgo Aeroporto 333.5 km
RAF Odiham 334.5 km