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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 - Horsham Distance
Charlwood 11.0 km
Gatwick Airport 14.5 km
Shoreham Airport 24.2 km
Kenley 32.2 km
Biggin Hill 37.7 km
Farnborough 40.8 km
Herstmonceux 47.0 km
London Heathrow Airport 47.3 km
RAF Odiham 47.7 km
Thorney Island 50.5 km
St. James's Park 52.0 km
Northolt 54.2 km
London City Airport 56.2 km
Gravesend Broadness 63.2 km
Solent MRSC 69.0 km
Southampton Airport 77.7 km
High Wycombe 78.1 km
Benson 82.6 km
Rothamsted Park 83.5 km
St. Catherine's Point 86.5 km
Middle Wallop 88.1 km
Lydd Airport 88.3 km
Luton Airport 91.0 km
London Southend Airport 91.2 km
Shoeburyness 96.5 km
London Stansted Airport 100.3 km
MoD Boscombe Down 101.0 km
Larkhill 105.0 km
Andrewsfield Aerodrome 106.9 km
Bournemouth 110.5 km
Cranfield Airport 115.1 km
Langdon Bay 116.9 km
RAF Brize Norton 117.5 km
Manston 121.0 km
Fairford Airport 122.9 km
RAF Lyneham 126.4 km
Bedford 130.4 km
RAF Little Rissington 131.3 km
Cambridge 132.6 km
RAF Wyton 145.4 km
Wattisham 147.6 km
Mildenhall Royal Air Force 156.6 km
Church Lawford 162.5 km
Lakenheath 163.9 km
Barfleur 164.7 km
Coventry Airport 167.2 km
Le Havre/Octeville 171.2 km
Sainte-Adresse 174.7 km
Wittering 174.7 km
Deauville-Saint-Gatien 190.5 km
Port-en-Bessin-Huppain 191.9 km
Deauville-Saint-Gatien AP 192.4 km