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United Kingdom

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 23.0 km
St. James's Park 23.0 km
Rothamsted Park 24.5 km
London Stansted Airport 27.4 km
Luton Airport 29.5 km
Northolt 32.4 km
Gravesend Broadness 34.7 km
London Heathrow Airport 38.8 km
Andrewsfield Aerodrome 39.0 km
Biggin Hill 42.8 km
Kenley 44.7 km
London Southend Airport 52.8 km
High Wycombe 52.9 km
Cranfield Airport 57.2 km
Cambridge 57.6 km
Shoeburyness 61.1 km
Gatwick Airport 62.1 km
Charlwood 64.6 km
Bedford 65.3 km
Farnborough 68.8 km
RAF Wyton 72.6 km
Benson 73.1 km
RAF Odiham 81.2 km
Wattisham 81.9 km
Mildenhall Royal Air Force 82.2 km
Lakenheath 89.7 km
Herstmonceux 93.8 km
Shoreham Airport 98.0 km
Manston 103.4 km
Wittering 106.3 km
RAF Brize Norton 107.0 km
Lydd Airport 107.2 km
Marham 113.4 km
Langdon Bay 114.9 km
RAF Little Rissington 115.1 km
Church Lawford 115.9 km
Thorney Island 117.6 km
Fairford Airport 120.8 km
Middle Wallop 122.8 km
Coventry Airport 124.0 km
Solent MRSC 129.8 km
Southampton Airport 130.3 km
RAF Holbeach 130.4 km
Norwich Weather Centre 138.1 km
Barkston 145.6 km
Cranwell 151.8 km
St. Catherine's Point 152.6 km
East Midlands Airport 154.1 km
Coningsby 154.3 km
Wainfleet 155.3 km
Weybourne 158.0 km
Waddington 166.5 km
Nottingham/Watnall 166.7 km
Scampton 181.5 km
Donna Nook 198.5 km