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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.


Stazioni meteo nelle vicinanze - Holyhead Distanza
Raf Mona 17.5 km
Aberdaron 56.4 km
Capel Curig 68.8 km
Aeroporto dell'Isola di Man 93.1 km
Bala 112.4 km
Rhyl 114.0 km
Trawscoed 119.8 km
Aberporth 124.0 km
Lago Vyrnwy 131.1 km
Crosby 165.6 km
Sennybridge 166.4 km
Pembrey Burrows 171.2 km
Walney 172.3 km
Hawarden 172.8 km
St Bees Head 174.0 km
Blackpool Aeroporto 176.2 km
Milford Haven 181.3 km
Dundrennan 182.1 km
RAF West Freugh 184.0 km
Liverpool AP 187.6 km
Warton Aerodrome Airport 191.8 km
Dublino Aeroporto 192.2 km
The Mumbles 196.6 km
Dublino Csmt Aero 211.6 km
Belfast/Porto 212.1 km
Shawbury 213.7 km
Shobdon 214.6 km
Keswick 215.5 km
Credenhill 232.4 km
St Athan 238.5 km
Stonyhurst 239.0 km
Rostherne 239.8 km
Johnstown Castle 243.6 km
RM Chivenor 244.3 km
Glenanne 244.5 km
Cardiff Aeroporto 244.8 km
Aeroporto di Belfast-Aldergrove 245.0 km
Shap 248.4 km
Manchester 250.7 km
Prestwick 251.6 km
Carlisle 256.0 km
Cosford 257.1 km
Cosford 257.1 km
Cosford 259.7 km
Liscombe 262.1 km
Oak Park 267.2 km
Eskdalemuir 272.5 km
Machrihanish 274.7 km
Warcop Rape 277.3 km
Drumalbin 277.4 km
Portglenone 279.2 km
Ballypatrick Fst 281.0 km
Great Dun Fell 281.3 km
Thorncliffe 284.4 km
North Wyke 284.6 km
Aeroporto di Bristol 289.5 km
Glasgow Aeroporto 291.2 km
Glasgow Bishopton 294.8 km
Spadeadam II 297.9 km
Spadeadam 297.9 km
Lough Fea 301.8 km
Dunkeswell Aeroporto 301.9 km
Bingley 303.3 km
Pershore 304.0 km
Gloucestershire Aeroporto 304.2 km
Cardinham 305.3 km
Exeter Aeroporto 306.0 km
Waterford Aeroporto 307.7 km
Newquay Airport 315.9 km
Mullingar 316.5 km
Ballyhaise 320.5 km
Emley Moor transmitting station 321.6 km
Birmingham Aeroporto 324.1 km
Plymouth MtBatten 324.6 km
Edimburgo Gogarbank 325.6 km
Yeovil 327.4 km
Edimburgo Aeroporto 327.5 km
Aeroporto di Leeds-Bradford 328.2 km
Coleshill 328.5 km
Islay/Porto Ellen 330.5 km
Redesdale Camp 337.8 km
Magilligan 342.1 km
RAF Lyneham 343.1 km
Coal Aston Airfield 345.5 km
Camborne 347.5 km
Fairford Aeroporto 351.6 km
RAF Little Rissington 351.9 km
Strathallan 351.9 km
Eglinton Aeroporto 353.0 km
Glen Ogle 353.0 km
Leeming 353.8 km
Albemarle 354.7 km
Midlands Orientali Aeroporto 359.8 km
RNAS Culdrose 360.3 km
Thomastown 361.1 km
Charterhall 363.1 km
Topcliffe 366.2 km
Nottingham/Watnall 366.4 km
RAF Brize Norton 368.4 km