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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.


Stations météo à proximité - Londonderry Distance
Magilligan 25.5 km
Malin Head 40.5 km
Lac Fea 52.1 km
Castlederg 61.8 km
Portglenone 79.7 km
Thomastown 93.7 km
Ballypatrick Fst 110.5 km
Belfast (Aéroport) 111.4 km
Ballyhaise 111.7 km
Glenanne 115.7 km
Islay/Ellen gauche 122.2 km
Donegal Aéroport 132.6 km
Finner Camp 136.3 km
Belfast/port 149.5 km
Île de Tiree 162.9 km
Machrihanish 166.9 km
Mullingar 168.7 km
Sligo Aéroport 182.3 km
Dublin Aéroport 204.9 km
Dublin Csmt aérien 209.2 km
Knock (Aéroport) 224.7 km
Gurteen 243.5 km
Oak Park 244.7 km
RAF West Freugh 247.4 km
Oban Aéroport 249.9 km
Claremorris 251.5 km
Uist Range sud 253.3 km
Benbecula 269.5 km
Prestwick 290.4 km
Aéroport du Ronaldsway 299.9 km
Glasgow Bishopton 306.4 km
Bealach na Bà 308.3 km
Aonach Mòr 312.0 km
Johnstown Castle 313.2 km
Glasgow Aéroport 315.8 km
Waterford Aéroport 316.3 km
Shannon Aéroport 325.6 km
Belmullet 329.7 km
Pont de Tulloch 338.9 km
Glen Ogle 349.8 km
Dundrennan 350.8 km
Vallée 353.0 km
Aultbea 354.4 km
Mace Head 360.7 km
Stornoway 362.2 km
Raf Mona 366.9 km
Aberdaron 367.9 km
Point de Roches 378.9 km
Cork (Aéroport) 382.9 km
Drumalbin 385.5 km
Loch Glascarnoch 388.3 km
St Bees Head 397.9 km
Strathallan 405.4 km
Capel Curig 418.2 km
Aberporth 432.4 km
Édimbourg Aéroport 434.6 km
Édimbourg Gogarbank 434.7 km
Milford Haven 438.3 km
Aviemore 439.4 km
Eskdalemuir 439.9 km
Aéroport d'Inverness 442.2 km
Walney 446.3 km
Keswick 447.2 km
Rhyl 451.3 km
Cairngorms 453.5 km
Bala 462.6 km
Trawscoed 465.7 km
Sherkin 468.5 km
Altnaharra 468.7 km
Tain Air Weapons Range 470.1 km
Blackpool Aéroport 478.9 km
Pembrey Burrows 481.9 km
Lake Vyrnwy 482.8 km
Dundee/Riverside 485.6 km
Crosby 485.9 km
Île de Valentia 486.5 km
Kinloss 492.1 km
Sennybridge 513.8 km
Lossiemouth 519.1 km
Mumbles 522.7 km
Sule Skerry 541.1 km
Royal Marines Base Chivenor 551.9 km
St Athan 578.1 km
Cardiff Aéroport 586.1 km
Wick 588.9 km
Liscombe 591.1 km