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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 - Cheshunt Distance
London City Airport 24.1 km
St James's Park 24.2 km
London Stansted Airport 36.0 km
Rothamsted Park 37.6 km
Luton Airport 41.8 km
Biggin Hill 42.2 km
Kenley 44.7 km
Gravesend Broadness 46.4 km
Northolt 47.2 km
Heathrow Airport 52.8 km
Andrewsfield Aerodrome 57.9 km
Cambridge 60.7 km
Gatwick Airport 63.5 km
Charlwood 65.9 km
Woburn 72.3 km
Bedford 76.3 km
Cranfield Airport 76.9 km
London Southend Airport 81.9 km
High Wycombe 85.4 km
Mildenhall Royal Air Force 93.2 km
Farnborough 93.9 km
Shoeburyness 96.7 km
Herstmonceux 98.1 km
Shoreham Airport 100.4 km
Lakenheath 104.0 km
Wittering 111.4 km
RAF Odiham 113.4 km
Benson 118.3 km
Wattisham 119.5 km
Marham 125.1 km
RAF Holbeach 131.7 km
Lydd Airport 136.3 km
Thorney Island 140.0 km
London Oxford Airport 143.9 km
Barkston 153.0 km
Coningsby 154.7 km
Cranwell 156.5 km
Wainfleet 158.0 km
Manston 158.8 km
Church Lawford 161.3 km
Langdon Bay 166.4 km
RAF Brize Norton 171.6 km
Waddington 171.9 km
Southampton Airport 176.3 km
Norwich Weather Centre 181.2 km
Middle Wallop 181.3 km
RAF Little Rissington 185.1 km
Scampton 187.2 km
St. Catherine's Point 188.0 km
Weybourne 188.8 km
East Midlands Airport 190.6 km
Fairford Airport 195.3 km
Donna Nook 197.6 km
Nottingham/Watnall 198.5 km
MoD Boscombe Down 200.1 km
Coleshill 203.3 km
Larkhill 204.4 km
Birmingham Airport 206.8 km
Boulogne-sur-Mer 211.3 km
Humberside 212.6 km
MoD Lyneham 218.8 km
Doncaster Airport 224.8 km
Bournemouth 224.9 km
Le Touquet 226.0 km
Pershore 228.2 km
Dieppe 233.6 km
Coal Aston Airfield 236.3 km
Gloucestershire Airport 237.3 km
Le Havre/Octeville 241.5 km
Sainte-Adresse 245.2 km
Leconfield 245.9 km
Deauville-Saint-Gatien 260.7 km
Deauville-Saint-Gatien AP 261.6 km
Bridlington 267.6 km
Thorncliffe 268.0 km
Cosford 271.2 km
Abbeville 271.3 km
Dunkirk 273.2 km
Cherbourg - Maupertus Airport 278.6 km
Emley Moor transmitting station 279.5 km
Caen 284.0 km
Filton 284.6 km
Rouen/Boos 291.3 km
Linton-On-Ouse 293.7 km
Isle of Portland 299.5 km
Yeovil 299.7 km
Bristol / Lulsgate 300.8 km
Leeds Bradford Intl. Airport 300.9 km
Fylingdales 305.1 km
Cap de la Hague 305.7 km
Koksijde 306.6 km
Manchester 310.6 km
Bingley 310.9 km
Credenhill 310.9 km
Topcliffe 316.3 km
Shawbury 317.7 km
Rostherne 319.3 km
Shobdon 322.4 km
Alderney Channel Is 326.9 km
Ostend Airport 327.6 km