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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.


Poblíž povětrnostní stanice - Porthmadog Vzdálenost
Capel Curig 20.1 km
Raf Mona 43.5 km
Bala 56.6 km
Valley 57.3 km
Rhyl 70.1 km
Lake Vyrnwy 74.1 km
Trawscoed 74.4 km
Aberdaron 76.2 km
Aberporth 110.2 km
Sennybridge 116.0 km
Hawarden 123.8 km
Crosby 126.1 km
Isle of Man (Letiště) 134.9 km
Liverpool (Letiště) 142.2 km
Blackpool Letiště 144.6 km
Pembrey Burrows 145.9 km
Walney 154.9 km
Warton Aerodrome (Letiště) 157.2 km
Shobdon 157.4 km
Shawbury 159.3 km
Mumbles 159.6 km
Credenhill 175.5 km
St Bees Head 176.5 km
Milford Haven 180.0 km
St Athan 191.2 km
Rostherne 193.6 km
Cardiff Letiště 196.2 km
Dundrennan 200.4 km
Cosford 201.9 km
Cosford 201.9 km
Stonyhurst 202.4 km
Manchester 204.1 km
Cosford 204.5 km
Keswick 206.9 km
RM Chivenor 212.9 km
Liscombe 219.6 km
RAF West Freugh 227.1 km
Shap 228.2 km
Thorncliffe 234.4 km
Bristol / Lulsgate 235.3 km
Dublin Letiště 245.9 km
Gloucestershire Letiště 246.9 km
Pershore 247.0 km
Carlisle 248.5 km
North Wyke 248.8 km
Warcop Range 254.4 km
Dunkeswell (Letiště) 255.6 km
Great Dun Fell 260.9 km
Exeter Letiště 262.4 km
Bingley 262.7 km
Dublin Csmt Aero 263.7 km
Belfast/Harbour 267.6 km
Birmingham Letiště 268.7 km
Coleshill 273.3 km
Yeovil 274.7 km
Eskdalemuir 274.7 km
Emley Moor transmitting station 277.5 km
Johnstown Castle 280.5 km
Spadeadam II 284.7 km
Spadeadam 284.7 km
Cardinham 284.8 km
Prestwick 284.8 km
RAF Lyneham 286.1 km
Letiště Leeds Bradford 287.5 km
Drumalbin 293.2 km
Plymouth MtBatten 293.7 km
Fairford (Letiště) 294.3 km
RAF Little Rissington 294.7 km
Coal Aston Airfield 297.2 km
Letiště Belfast 301.5 km
Newquay (Letiště) 301.6 km
Glenanne 301.8 km
East Midlands Letiště 307.3 km
RAF Brize Norton 311.2 km
Oak Park 314.0 km
Church Lawford 314.5 km
Nottingham/Watnall 315.3 km
Leeming 318.5 km
Glasgow Letiště 321.2 km
Larkhill 323.5 km
Redesdale Camp 323.8 km
Machrihanish 324.4 km
Glasgow Bishopton 326.5 km
Topcliffe 328.8 km
MoD Boscombe Down 330.2 km
Portland 330.5 km
Albemarle 332.4 km
Oxford (Letiště) 333.7 km
Ballypatrick Fst 335.2 km
Edinburgh Gogarbank 335.5 km
Portglenone 335.6 km
Linton-On-Ouse 336.0 km
Linton-On-Ouse 336.0 km
Edinburgh Letiště 337.7 km
Camborne 337.9 km
Teesside Intl. Airport 339.8 km
Waterford Letiště 346.3 km
Doncaster Letiště 346.8 km
Middle Wallop 347.5 km
Letiště Newcastle 348.5 km