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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.


附近气象站 - Porthmadog Distance
Capel Curig 28.8 km
Raf Mona 47.8 km
Valley 59.3 km
Bala 59.4 km
Trawscoed 66.3 km
阿貝達隆 70.2 km
Lake Vyrnwy 74.7 km
萊爾 77.6 km
Aberporth 100.3 km
Sennybridge 109.6 km
Hawarden 129.2 km
Crosby 133.6 km
Pembrey Burrows 136.1 km
Isle of Man Airport 141.7 km
利物浦机场 148.4 km
Mumbles 150.6 km
黑潭 機場 153.2 km
Shobdon 156.0 km
Shawbury 161.9 km
Walney 164.6 km
Warton Aerodrome Airport 165.3 km
米爾福德港 170.4 km
Credenhill 173.4 km
St Athan 184.2 km
St Bees Head 186.4 km
加的夫 189.5 km
Rostherne 199.3 km
RM Chivenor 203.6 km
Cosford 203.9 km
Cosford 203.9 km
Cosford 206.5 km
曼彻斯特 209.7 km
Dundrennan 209.8 km
Stonyhurst 210.0 km
Liscombe 211.6 km
凯西克 216.7 km
Bristol / Lulsgate 230.8 km
RAF West Freugh 234.0 km
Shap 237.5 km
Thorncliffe 238.9 km
North Wyke 240.0 km
都柏林机场 244.3 km
格洛斯特郡 機場 245.7 km
珀肖爾 247.1 km
Dunkeswell Airport 248.4 km
埃克塞特 機場 254.7 km
卡萊爾 258.3 km
都柏林机场 261.4 km
Warcop Range 263.5 km
賓格利 269.5 km
約維爾 269.5 km
Great Dun Fell 270.1 km
伯明翰 機場 270.3 km
贝尔法斯特 271.1 km
Johnstown Castle 274.5 km
Cardinham 274.9 km
科爾斯希爾 275.1 km
Emley Moor transmitting station 283.4 km
RAF Lyneham 283.9 km
普利茅斯 284.4 km
Eskdalemuir 284.7 km
Newquay Airport 291.7 km
費爾福德 機場 293.1 km
普雷斯特威克 293.2 km
里茲布拉福機場 294.2 km
RAF Little Rissington 294.3 km
Spadeadam 294.3 km
Spadeadam II 294.3 km
Coal Aston Airfield 302.1 km
Glenanne 302.8 km
Drumalbin 302.9 km
贝尔法斯特/阿尔德格罗夫机场 304.3 km
Oak Park 309.9 km
布萊茲諾頓皇家空軍基地 310.5 km
東密德蘭 機場 310.6 km
Church Lawford 316.2 km
Nottingham/Watnall 319.1 km
Larkhill 320.8 km
波特兰岛 324.9 km
Leeming 326.1 km
MoD Boscombe Down 327.5 km
坎伯恩 328.0 km
格拉斯哥 329.9 km
Machrihanish 330.1 km
Redesdale Camp 333.3 km
Oxford Airport 333.7 km
Glasgow Bishopton 335.1 km
Topcliffe 336.1 km
Portglenone 338.5 km
RNAS Culdrose 338.9 km
Ballypatrick Fst 339.5 km
沃特福德 機場 340.4 km
Albemarle 341.4 km
Linton-On-Ouse 342.8 km
Linton-On-Ouse 342.8 km
Middle Wallop 345.2 km
Edinburgh Gogarbank 345.4 km
爱丁堡机场 347.6 km
Teesside International Airport 347.6 km
伯恩茅斯 347.6 km

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