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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 - Winchester Distance
Southampton Airport 20.7 km
Middle Wallop 29.3 km
RAF Odiham 45.6 km
MoD Boscombe Down 49.5 km
Thorney Island 52.1 km
St. Catherine's Point 53.8 km
Larkhill 55.8 km
Bournemouth 65.6 km
Farnborough 65.8 km
Benson 66.2 km
RAF Brize Norton 82.3 km
Oxford Airport 85.7 km
Fairford Airport 86.4 km
RAF Lyneham 89.5 km
High Wycombe 89.5 km
RAF Little Rissington 97.8 km
Heathrow Airport 106.8 km
Northolt 111.9 km
Brighton City Airport 117.9 km
Charlwood 121.3 km
Gatwick Airport 126.5 km
Gloucestershire Airport 131.4 km
Woburn 132.5 km
Rothamsted Park 134.7 km
Cranfield Airport 136.4 km
Luton Airport 138.7 km
Kenley 138.9 km
Isle of Portland 140.2 km
St James's Park 140.7 km
Church Lawford 143.8 km
Pershore 144.6 km
Yeovil 146.8 km
Biggin Hill 153.0 km
Bedford 158.1 km
Cherbourg - Maupertus Airport 158.6 km
London City Airport 159.6 km
Bristol / Lulsgate 160.0 km
Birmingham Airport 160.8 km
Coleshill 162.8 km
Cap de la Hague 165.2 km
Alderney Channel Is 179.5 km
Herstmonceux 182.8 km
London Stansted Airport 195.0 km
East Midlands Airport 196.4 km
Wittering 196.6 km
Credenhill 200.1 km
Cosford 204.9 km
Cosford 206.8 km
Cosford 206.8 km
Cambridge 209.3 km
Dunkeswell Airport 215.4 km
Nottingham/Watnall 215.9 km
Andrewsfield Aerodrome 217.3 km
Shobdon 218.5 km
Barkston 227.4 km
Jersey Airport 228.1 km
Cardiff Airport 228.6 km
Caen 230.8 km
London Southend Airport 230.9 km
Le Havre/Octeville 231.1 km
Guernsey Airport 231.1 km
Sainte-Adresse 232.6 km
Exeter Airport 235.4 km
Cranwell 236.6 km
St Athan 238.8 km
Thorncliffe 241.0 km
Shawbury 244.5 km
Shoeburyness 244.7 km
Mildenhall Royal Air Force 247.1 km
Coal Aston Airfield 249.4 km
Waddington 250.1 km
Deauville-Saint-Gatien 251.1 km
Deauville-Saint-Gatien AP 251.3 km
Lydd Airport 251.4 km
Liscombe 254.2 km
Lakenheath 257.9 km
Holbeach Air Weapons Range 258.2 km
Coningsby 258.4 km
Scampton 262.8 km
Doncaster Airport 270.3 km
Marham 273.9 km
Manchester 275.9 km
Wattisham Airport 279.1 km
Sennybridge 279.1 km
Rostherne 281.4 km
Emley Moor transmitting station 285.9 km
Wainfleet All Saints 286.1 km
Dinard/Pleurtuit 288.7 km
North Wyke 289.5 km
Langdon Bay 296.9 km
Dieppe 297.1 km
Hawarden 298.3 km
Manston 298.5 km
Humberside 300.1 km
Mumbles 302.0 km
Lake Vyrnwy 303.9 km
Liverpool AP 304.5 km
Bingley 311.5 km
Leeds Bradford Airport 313.8 km
Donna Nook 314.0 km