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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 - Watford Distance
Northolt 13.7 km
Rothamsted Park 17.6 km
Heathrow Airport 20.4 km
Luton Airport 25.1 km
St James's Park 32.4 km
High Wycombe 46.5 km
Woburn 47.4 km
Kenley 50.4 km
London City Airport 51.0 km
Cranfield Airport 53.7 km
Biggin Hill 58.4 km
Charlwood 58.8 km
Farnborough 59.0 km
Gatwick Airport 59.9 km
Bedford 64.1 km
London Stansted Airport 73.4 km
RAF Odiham 77.5 km
Benson 79.7 km
Cambridge 87.9 km
Brighton City Airport 91.6 km
Andrewsfield Aerodrome 96.8 km
Oxford Airport 106.3 km
Wittering 107.4 km
Thorney Island 110.7 km
Herstmonceux 114.9 km
London Southend Airport 120.4 km
Mildenhall Royal Air Force 125.1 km
Church Lawford 131.8 km
RAF Brize Norton 133.5 km
Shoeburyness 135.1 km
Lakenheath 135.9 km
Southampton Airport 140.6 km
Middle Wallop 143.0 km
RAF Little Rissington 147.6 km
Barkston 148.0 km
Holbeach Air Weapons Range 148.1 km
Marham 153.5 km
Cranwell 154.3 km
St. Catherine's Point 156.6 km
Fairford Airport 156.6 km
Wattisham Airport 158.3 km
MoD Boscombe Down 161.4 km
Coningsby 161.4 km
Larkhill 165.5 km
Lydd Airport 166.3 km
East Midlands Airport 168.4 km
Waddington 169.5 km
Coleshill 171.9 km
Birmingham Airport 174.7 km
Wainfleet All Saints 175.9 km
Nottingham/Watnall 179.2 km
RAF Lyneham 179.9 km
Scampton 184.6 km
Bournemouth 188.0 km
Pershore 191.9 km
Manston 195.8 km
Gloucestershire Airport 199.7 km
Langdon Bay 201.3 km
Donna Nook 211.7 km
Doncaster Airport 214.6 km
Humberside 215.2 km
Norwich Weather Centre 217.8 km
Coal Aston Airfield 217.9 km
Weybourne 221.4 km
Cosford 238.1 km
Cosford 240.7 km
Cosford 240.7 km
Le Havre/Octeville 241.3 km
Thorncliffe 242.3 km
Boulogne-sur-Mer 243.2 km
Sainte-Adresse 244.5 km
Leconfield 247.7 km
Dieppe 252.5 km
Cherbourg - Maupertus Airport 253.4 km
Le Touquet 255.9 km
Yeovil 260.7 km
Emley Moor transmitting station 260.9 km
Deauville-Saint-Gatien 261.4 km
Deauville-Saint-Gatien AP 261.7 km
Bristol / Lulsgate 261.7 km
Isle of Portland 262.4 km
Credenhill 273.3 km
Bridlington 273.8 km
Caen 274.7 km
Cap de la Hague 275.8 km
Linton-On-Ouse 283.6 km
Manchester 283.8 km
Leeds Bradford Airport 284.2 km
Shawbury 284.6 km
Shobdon 286.2 km
Bingley 291.8 km
Rostherne 292.8 km
Alderney Channel Is 295.3 km
Abbeville 299.0 km
Fylingdales 304.0 km
Topcliffe 304.9 km
Rouen/Boos 306.7 km
Dunkirk 309.7 km
Leeming 321.5 km
Loftus Samos 328.6 km