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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 - Iona Distance
Tiree Island 55.8 km
Islay/Port Ellen 72.5 km
Oban Airport 115.0 km
Machrihanish 126.2 km
Ballypatrick Fst 128.5 km
Magilligan 141.0 km
Malin Head 146.4 km
Bealach na Bà 146.4 km
South Uist Range 154.3 km
Portglenone 161.3 km
Eglinton Airport 162.1 km
Benbecula 165.3 km
Lough Fea 182.0 km
Belfast Intl. Airport 184.8 km
Aultbea 192.5 km
Belfast/Harbour 199.1 km
Tulloch Bridge 200.6 km
Stornoway 210.5 km
Glasgow Bishopton 214.7 km
Castlederg 220.8 km
Prestwick 222.5 km
Glasgow Airport 227.0 km
Loch Glascarnoch 230.6 km
Glenanne 230.6 km
RAF West Freugh 231.1 km
Glen Ogle 233.8 km
Thomastown 256.0 km
Donegal Airport 256.2 km
Ballyhaise 269.1 km
Finner Camp 286.1 km
Inverness Airport 296.0 km
Strathallan 298.7 km
Aviemore 303.8 km
Drumalbin 308.6 km
Altnaharra 310.2 km
Dundrennan 316.7 km
Isle of Man Airport 317.2 km
Dublin Airport 319.6 km
RAF Tain 321.0 km
Cairngorms 322.3 km
Mullingar 324.7 km
Sligo Airport 330.8 km
Dublin Csmt Aero 333.7 km
Edinburgh Airport 343.8 km
Edinburgh Gogarbank 345.3 km
Kinloss 350.0 km
St Bees Head 370.8 km
Eskdalemuir 374.7 km
Ireland West Airport Knock 377.4 km
Lossiemouth 378.4 km
Dundee/Riverside 378.8 km
Sule Skerry 380.0 km
Oak Park 387.1 km
Leuchars 396.3 km
Valley 399.3 km
Gurteen 404.8 km
Claremorris 404.8 km
Aboyne 407.9 km
Raf Mona 408.5 km
Keswick 409.7 km
Carlisle 414.4 km
Walney 428.7 km
Carlisle Lake District Airport 430.2 km
Aberdaron 434.0 km
Wick 440.1 km
Johnstown Castle 445.6 km
Capel Curig 451.2 km
Spadeadam II 452.8 km
Spadeadam 452.8 km
Charterhall 454.2 km
Belmullet 460.2 km
Shap 461.9 km
Waterford Airport 462.7 km
Inverbervie 466.6 km
Rhyl 470.2 km
Blackpool Airport 470.4 km
Redesdale Camp 475.1 km
Great Dun Fell 477.3 km
Aberdeen Airport 479.2 km
Woodvale 482.3 km
Warcop Range 485.8 km
Crosby 486.5 km
Shannon Airport 486.6 km
Warton Aerodrome Airport 486.8 km
Kirkwall Airport 488.5 km
Bala 493.1 km
Aberporth 507.2 km
Mace Head 509.5 km
Lake Vyrnwy 514.1 km
Liverpool AP 516.9 km
Hawarden 517.9 km
Trawscoed 518.4 km
Stonyhurst 518.9 km
Rostherne 557.0 km
Sennybridge 565.0 km
Manchester 565.8 km
Shawbury 571.4 km
Shobdon 599.0 km
Cosford 615.5 km
Credenhill 618.6 km