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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 - Isle of Portland Distance
Isle of Portland 4.1 km
Yeovil 54.8 km
Bournemouth 71.7 km
Dunkeswell Airport 96.2 km
Alderney Channel Is 96.3 km
Bristol / Lulsgate 97.9 km
Larkhill 101.0 km
MoD Boscombe Down 102.4 km
Cap de la Hague 108.1 km
Exeter Airport 110.2 km
RAF Lyneham 116.8 km
Middle Wallop 117.3 km
Southampton Airport 121.4 km
Guernsey Airport 125.6 km
St. Catherine's Point 126.2 km
Cardiff Airport 138.3 km
Liscombe 142.8 km
Fairford Airport 144.9 km
St Athan 146.6 km
Cherbourg - Maupertus Airport 146.7 km
Jersey Airport 150.6 km
Gloucestershire Airport 152.3 km
RAF Brize Norton 164.8 km
North Wyke 165.0 km
RAF Little Rissington 167.5 km
Thorney Island 170.7 km
Credenhill 175.3 km
RAF Odiham 182.6 km
Pershore 183.5 km
Plymouth MtBatten 189.1 km
Oxford Airport 189.4 km
Benson 190.4 km
Shobdon 195.7 km
RM Chivenor 200.1 km
Farnborough 202.7 km
Mumbles 206.3 km
Sennybridge 214.0 km
High Wycombe 221.3 km
Dinard/Pleurtuit 222.5 km
Ploumanac'h 222.8 km
Birmingham Airport 225.3 km
Saint-Brieuc Armor 229.0 km
Coleshill 230.7 km
Lannion Airport 230.8 km
Cosford 232.3 km
Cosford 232.9 km
Cosford 232.9 km
Church Lawford 235.7 km
Brighton City Airport 241.4 km
Heathrow Airport 243.7 km
Cardinham 248.7 km
Northolt 248.7 km
Pembrey Burrows 251.2 km
Shawbury 251.6 km
Charlwood 254.0 km
Gatwick Airport 259.2 km
Trawscoed 261.1 km
Woburn 261.3 km
Cranfield Airport 263.8 km
Morlaix/Ploujean 265.9 km
Caen 268.1 km
Rothamsted Park 270.0 km
Lake Vyrnwy 270.3 km
Luton Airport 273.1 km
Kenley 273.9 km
St James's Park 277.4 km
East Midlands Airport 282.0 km
Newquay Airport 285.5 km
Bedford 285.5 km
Rennes- Saint-Jacques Airport 286.8 km
Biggin Hill 287.9 km
Thorncliffe 291.1 km
Bala 291.6 km
Landivisiau 295.0 km
Aberporth 295.5 km
London City Airport 296.0 km
Brignogan-Plages 296.2 km
Hawarden 297.3 km
Sainte-Adresse 301.8 km
Le Havre/Octeville 302.1 km
Nottingham/Watnall 303.2 km
Herstmonceux 308.4 km
Manchester 311.9 km
Rostherne 312.6 km
Liverpool AP 313.0 km
Wittering 317.5 km
Deauville-Saint-Gatien 318.0 km
Milford Haven 318.1 km
Deauville-Saint-Gatien AP 318.1 km
RNAS Culdrose 318.6 km
Guipavas 321.2 km
Camborne 323.1 km
Rhyl 324.1 km
Lorient South Brittany Airport 325.8 km
Coal Aston Airfield 326.1 km
Capel Curig 329.0 km
London Stansted Airport 331.9 km
Crosby 335.5 km
Lanvéoc/Poulmic 337.1 km
Laval Airport 337.6 km