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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.


Estaciones meteorológicas cercanas - Portsmouth Distancia
Southampton Aeropuerto 23.2 km
Punta de St. Catherine 25.8 km
Thorney Island 32.8 km
Middle Wallop 55.1 km
RAF Odiham 57.5 km
Bournemouth 68.7 km
MoD Boscombe Down 72.0 km
Farnborough 73.5 km
Larkhill 78.7 km
Benson 92.2 km
Brighton City aeropuerto 104.0 km
High Wycombe 108.7 km
Londres-Heathrow aeropuerto 114.0 km
RAF Brize Norton 114.0 km
Oxford aeropuerto 116.0 km
Charlwood 116.3 km
Lyneham Airfield 116.5 km
Fairford Aeropuerto 117.1 km
Northolt 120.1 km
Londres-Gatwick aeropuerto 121.5 km
RAF Little Rissington 129.4 km
Cherbourg - Maupertus aeropuerto 131.1 km
Kenley 137.2 km
Isla de Pórtland 140.9 km
St. James's Park 144.1 km
Cabo de la Hague 144.6 km
Rothamsted Park 147.2 km
Biggin Hill 151.1 km
Woburn 151.8 km
Londres-Luton aeropuerto 152.4 km
Cranfield Aeropuerto 156.6 km
Yeovil 159.3 km
Gloucestershire Aeropuerto 160.7 km
la Ciudad de Londres aeropuerto 161.1 km
Alderney Channel Is 162.8 km
Herstmonceux 171.0 km
Church Lawford 173.9 km
Pershore 175.6 km
Bedford 177.6 km
Brístol aeropuerto 179.4 km
Birmingham Aeropuerto 192.4 km
Coleshill 194.4 km
Caen 199.2 km
Londres-Stansted aeropuerto 201.5 km
Le Havre/Octeville 202.0 km
Sainte-Adresse 203.3 km
Jersey Aeropuerto 207.4 km
Guernsey aeropuerto 216.4 km
Wittering 218.5 km
Cambridge 220.4 km
Deauville-Saint-Gatien 221.7 km
Deauville-Saint-Gatien aeropuerto 221.9 km
Andrewsfield Aerodrome 222.1 km
Dunkeswell Aeropuerto 225.4 km
Región de las Tierras Medias Orientales Aeropuerto 226.4 km
Credenhill 226.8 km
Londres-Southend aeropuerto 229.5 km
Cosford 236.0 km
Cosford 237.9 km
Cosford 237.9 km
Lydd aeropuerto 240.6 km
Shoeburyness 242.5 km
Exeter Aeropuerto 243.8 km
Nottingham/Watnall 245.5 km
Cardiff Aeropuerto 245.9 km
Shobdon 245.9 km
Barkston 251.8 km
St Athan 255.9 km
Mildenhall Royal Air Force 257.2 km
Cranwell 260.7 km
Dinard/Pleurtuit 264.2 km
Liscombe 267.2 km
Lakenheath 267.9 km
Thorncliffe 272.7 km
Waddington 274.7 km
Shawbury 274.9 km
Dieppe 275.3 km
Holbeach Air Weapons Range 275.7 km
Coal Aston Airfield 279.7 km
Coningsby 279.7 km
Wattisham aeropuerto 283.3 km
Marham 286.0 km
Scampton 288.0 km
Langdon Bay 288.1 km
Manston 292.2 km
Doncaster Aeropuerto 298.6 km
North Wyke 298.7 km
Alencon/Valframbert 301.5 km
Sennybridge 302.0 km
Wainfleet All Saints 303.8 km
Mánchester 307.6 km
Rennes Saint-Jacques aeropuerto 309.3 km
Rouen/Boos 310.2 km
Saint-Brieuc Armor 310.9 km
Laval Aeropuerto 312.6 km
Rostherne 313.0 km
Boulogne-sur-Mer 313.6 km
Emley Moor transmitting station 316.9 km
Le Touquet-Paris-Plage 317.0 km
Mumbles 319.6 km