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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 - Chichester Distance
Thorney Island 15.6 km
RAF Odiham 48.6 km
Farnborough 50.1 km
Brighton City Airport 55.7 km
St. Catherine's Point 63.9 km
Southampton Airport 69.0 km
Charlwood 70.6 km
Gatwick Airport 75.5 km
Heathrow Airport 80.9 km
Northolt 87.6 km
Kenley 93.1 km
Middle Wallop 94.1 km
Benson 94.4 km
High Wycombe 94.6 km
St James's Park 104.2 km
Biggin Hill 106.4 km
MoD Boscombe Down 113.8 km
Bournemouth 117.0 km
Rothamsted Park 118.2 km
London City Airport 118.8 km
Larkhill 120.3 km
Herstmonceux 122.6 km
Luton Airport 124.8 km
Oxford Airport 126.7 km
Woburn 133.3 km
RAF Brize Norton 135.8 km
Cranfield Airport 139.1 km
Fairford Airport 146.6 km
Cherbourg - Maupertus Airport 152.3 km
RAF Little Rissington 152.7 km
RAF Lyneham 153.9 km
Bedford 157.6 km
London Stansted Airport 162.7 km
Le Havre/Octeville 173.9 km
Sainte-Adresse 176.0 km
Cap de la Hague 178.4 km
Church Lawford 180.4 km
Andrewsfield Aerodrome 181.3 km
London Southend Airport 184.0 km
Cambridge 186.3 km
Caen 187.4 km
Isle of Portland 188.9 km
Lydd Airport 192.2 km
Gloucestershire Airport 193.4 km
Deauville-Saint-Gatien 194.5 km
Deauville-Saint-Gatien AP 194.7 km
Shoeburyness 196.4 km
Alderney Channel Is 200.8 km
Wittering 201.1 km
Pershore 202.1 km
Yeovil 206.8 km
Birmingham Airport 208.7 km
Coleshill 209.2 km
Mildenhall Royal Air Force 221.2 km
Bristol / Lulsgate 224.0 km
East Midlands Airport 230.5 km
Lakenheath 231.6 km
Dieppe 232.4 km
Barkston 238.7 km
Jersey Airport 239.2 km
Langdon Bay 239.8 km
Wattisham Airport 241.2 km
Manston 244.3 km
Cranwell 246.6 km
Nottingham/Watnall 247.3 km
Holbeach Air Weapons Range 249.2 km
Marham 252.0 km
Guernsey Airport 255.3 km
Coningsby 259.7 km
Cosford 260.8 km
Waddington 261.4 km
Cosford 262.9 km
Cosford 262.9 km
Credenhill 264.1 km
Boulogne-sur-Mer 265.5 km
Le Touquet 269.5 km
Rouen/Boos 272.0 km
Dunkeswell Airport 273.5 km
Scampton 275.8 km
Wainfleet All Saints 277.1 km
Shobdon 282.0 km
Coal Aston Airfield 284.3 km
Alencon/Valframbert 284.7 km
Thorncliffe 288.1 km
Dinard/Pleurtuit 288.3 km
Cardiff Airport 291.8 km
Exeter Airport 292.1 km
Doncaster Airport 295.0 km
Evreux/Fauville 300.8 km
Abbeville 301.5 km
St Athan 301.9 km
Shawbury 303.0 km
Norwich Weather Centre 308.2 km
Humberside 309.9 km
Laval Airport 311.9 km
Donna Nook 312.0 km
Liscombe 314.8 km
Weybourne 317.0 km
Emley Moor transmitting station 324.5 km
Rennes- Saint-Jacques Airport 325.3 km