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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 - Porthcawl Distance
St Athan 30.6 km
Mumbles 33.4 km
Cardiff Airport 41.0 km
Liscombe 44.0 km
Royal Marines Base Chivenor 65.7 km
Sennybridge 67.3 km
Pembrey Burrows 79.2 km
North Wyke 80.9 km
Dunkeswell Airport 85.2 km
Exeter Airport 87.7 km
Trawscoed 102.0 km
Bristol Airport 109.9 km
Credenhill 121.4 km
Aberporth 121.6 km
Filton 124.4 km
Shobdon 126.5 km
Yeovil 129.6 km
Plymouth MtBatten 132.4 km
Lake Vyrnwy 144.9 km
Cardinham 151.9 km
Milford Haven 152.5 km
Bala 160.3 km
Isle of Portland 174.7 km
Gloucestershire Airport 178.1 km
Capel Curig 183.3 km
Newquay Cornwall Airport 183.5 km
Aberdaron 186.0 km
Shawbury 187.6 km
MoD Lyneham 190.5 km
Rhyl 199.4 km
Pershore 200.5 km
Cosford 204.2 km
Hawarden 205.1 km
Raf Mona 212.3 km
Larkhill 213.6 km
Fairford Airport 214.2 km
Valley 218.7 km
MoD Boscombe Down 219.6 km
Bournemouth 221.3 km
Camborne 227.2 km
Liverpool AP 228.0 km
RAF Little Rissington 228.0 km
RNAS Culdrose 231.3 km
Crosby 236.7 km
RAF Brize Norton 238.9 km
Middle Wallop 240.1 km
Birmingham Airport 244.7 km
Woodvale 245.2 km
Coleshill 251.4 km
Alderney Channel Is 256.4 km
Rostherne 256.6 km
Guernsey Airport 257.0 km
Manchester 262.1 km
Southampton Airport 263.7 km
Thorncliffe 266.0 km
Coventry Airport 266.3 km
Blackpool Airport 266.5 km
London Oxford Airport 268.2 km
Warton Aerodrome Airport 268.8 km
La Hague 276.6 km
Church Lawford 282.2 km
St. Catherine's Point 284.7 km
Benson 290.8 km
Ploumanac’h 293.7 km
Stonyhurst 296.7 km
Walney 298.7 km
Jersey Airport 300.7 km
Lannion Airport 302.9 km
East Midlands Airport 304.1 km
RAF Odiham 308.3 km
Isle of Man Airport 308.5 km
Saint Helier 310.3 km
Brignogan-Plages 317.0 km
Thorney Island 318.0 km
Cherbourg - Maupertus Airport 320.2 km
Nottingham/Watnall 321.7 km
High Wycombe 323.7 km
Johnstown Castle 324.9 km
Farnborough 327.2 km
Emley Moor transmitting station 328.4 km
Landivisiau 330.6 km
Bingley 330.7 km
Scilly St Mary 336.6 km
St Bees Head 339.1 km
Saint-Brieuc Armor 339.5 km
Guipavas 344.3 km
Cranfield Airport 349.7 km
Woburn 350.5 km
Leeds Bradford Intl. Airport 351.1 km
Keswick 354.4 km
Shap 355.6 km
Dublin Airport 358.0 km
London Heathrow Airport 361.8 km
Ushant 363.6 km
Lanvéoc/Poulmic 363.8 km
Northolt 364.8 km
Dublin Csmt Aero 365.9 km
Bedford 367.7 km
Dinard/Pleurtuit 368.5 km
Dundrennan 372.0 km