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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 - Llyn Brenig Distance
Rhyl 19.6 km
Bala 20.9 km
Lake Vyrnwy 37.5 km
Capel Curig 46.4 km
Hawarden 60.1 km
Crosby 68.2 km
Liverpool AP 79.2 km
Blackpool Airport 93.4 km
Trawscoed 95.1 km
Raf Mona 97.7 km
Shawbury 99.7 km
Warton Aerodrome Airport 101.9 km
Sennybridge 113.5 km
Valley 114.7 km
Shobdon 116.3 km
Walney 118.6 km
Rostherne 130.0 km
Credenhill 136.8 km
Aberdaron 139.5 km
Manchester 140.5 km
Cosford 143.5 km
Cosford 143.5 km
Stonyhurst 143.6 km
Cosford 146.1 km
Aberporth 157.4 km
St Bees Head 159.7 km
Isle of Man Airport 166.7 km
Thorncliffe 171.0 km
Keswick 174.7 km
Mumbles 176.3 km
Pembrey Burrows 178.9 km
Shap 182.8 km
St Athan 186.6 km
Cardiff Airport 188.4 km
Pershore 195.0 km
Dundrennan 198.7 km
Bingley 200.7 km
Gloucestershire Airport 200.8 km
Warcop Range 205.4 km
Bristol / Lulsgate 208.8 km
Birmingham Airport 210.6 km
Great Dun Fell 213.9 km
Emley Moor transmitting station 214.1 km
Coleshill 214.7 km
Carlisle 214.7 km
Liscombe 222.4 km
Leeds Bradford Airport 225.3 km
Milford Haven 229.6 km
RM Chivenor 233.1 km
Coal Aston Airfield 233.5 km
Spadeadam 243.7 km
Spadeadam II 243.7 km
RAF Lyneham 244.3 km
RAF Little Rissington 244.4 km
East Midlands Airport 245.2 km
Fairford Airport 247.4 km
Dunkeswell Airport 248.9 km
Eskdalemuir 250.0 km
Yeovil 251.6 km
Nottingham/Watnall 252.3 km
RAF West Freugh 252.6 km
Church Lawford 256.3 km
Leeming 258.9 km
North Wyke 260.9 km
Exeter Airport 261.0 km
RAF Brize Norton 261.3 km
Topcliffe 268.0 km
Linton-On-Ouse 274.0 km
Redesdale Camp 280.9 km
Oxford Airport 281.1 km
Teesside Intl. Airport 281.3 km
Albemarle 281.9 km
Drumalbin 282.5 km
Doncaster Airport 283.0 km
Larkhill 283.5 km
MoD Boscombe Down 290.0 km
Prestwick 295.1 km
Newcastle Intl. Airport 296.5 km
Middle Wallop 305.5 km
Dublin Airport 306.7 km
Isle of Portland 309.0 km
Plymouth MtBatten 310.4 km
Belfast/Harbour 312.6 km
Cardinham 313.9 km
Benson 314.5 km
Edinburgh Gogarbank 316.7 km
Bournemouth 317.0 km
Charterhall 317.9 km
Edinburgh Airport 319.1 km
Dublin Csmt Aero 325.6 km
Glasgow Airport 326.0 km
Barkston 328.6 km
Scampton 331.1 km
Glasgow Bishopton 333.3 km
Waddington 334.1 km
Cranwell 335.5 km
Boulmer 335.9 km
Newquay Airport 336.4 km
Loftus Samos 338.1 km
Southampton Airport 338.3 km