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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 - Portadown Distance
Glenanne 21.6 km
Belfast Intl. Airport 35.8 km
Portglenone 49.7 km
Lough Fea 54.2 km
Belfast/Harbour 64.5 km
Ballypatrick Fst 89.9 km
Magilligan 100.2 km
Ballyhaise 104.6 km
Eglinton Airport 106.1 km
Dublin Airport 110.7 km
Dublin Csmt Aero 123.5 km
Thomastown 129.6 km
Castlederg 131.8 km
Machrihanish 139.0 km
Islay/Port Ellen 141.6 km
Mullingar 141.9 km
Malin Head 145.1 km
RAF West Freugh 173.8 km
Oak Park 180.8 km
Finner Camp 201.6 km
Isle of Man Airport 203.7 km
Donegal Airport 223.4 km
Gurteen 233.1 km
Johnstown Castle 235.1 km
Tiree Island 235.7 km
Prestwick 239.3 km
Sligo Airport 241.6 km
Valley 247.9 km
Oban Airport 254.2 km
Waterford Airport 257.0 km
Aberdaron 261.8 km
Raf Mona 262.4 km
Glasgow Bishopton 268.4 km
Ireland West Airport 271.4 km
Dundrennan 273.4 km
Glasgow Airport 274.9 km
Claremorris 294.2 km
Aonach Mòr 312.0 km
St Bees Head 314.0 km
Capel Curig 314.3 km
Glen Ogle 323.7 km
Aberporth 327.4 km
Drumalbin 328.7 km
Tulloch Bridge 333.0 km
Shannon Airport 335.7 km
Milford Haven 338.0 km
South Uist Range 338.7 km
Bealach na Bà 342.4 km
Rhyl 349.9 km
Roches Point 352.6 km
Benbecula 354.1 km
Walney 355.9 km
Bala 358.7 km
Trawscoed 359.6 km
Cork Airport 363.7 km
Keswick 365.4 km
Strathallan 367.0 km
Eskdalemuir 372.6 km
Pembrey Burrows 377.4 km
Lake Vyrnwy 378.4 km
Edinburgh Gogarbank 382.6 km
Edinburgh Airport 383.0 km
Blackpool Airport 384.5 km
Crosby 388.3 km
Carlisle 390.5 km
Aultbea 392.2 km
Belmullet 397.6 km
Warton Aerodrome Airport 402.2 km
Loch Glascarnoch 404.2 km
Mace Head 404.5 km
Sennybridge 407.7 km
Hawarden 408.3 km
Liverpool AP 416.6 km
Mumbles 417.4 km
Shap 417.5 km
Stornoway 420.6 km
Aviemore 423.1 km
Cairngorms 432.2 km
Inverness Airport 436.6 km
Spadeadam 438.0 km
Spadeadam II 438.0 km
Dundee/Riverside 442.2 km
Great Dun Fell 444.4 km
Stonyhurst 446.3 km
Warcop Range 447.4 km
RM Chivenor 448.4 km
Leuchars 453.1 km
Shawbury 456.1 km
Shobdon 462.5 km
Sherkin 464.8 km
Rostherne 466.0 km
Tain Air Weapons Range 467.8 km
Newquay Airport 468.6 km
St Athan 472.1 km
Redesdale Camp 472.3 km
Charterhall 472.9 km
Cardinham 476.2 km
Manchester 476.9 km
Kinloss 480.0 km
Cardiff Airport 480.1 km