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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.


Stations météo à proximité - Portsmouth Distance
Ross Aéroport 12.6 km
Aéroport international Rickenbacker 14.9 km
Aéroport international John Glenn Columbus 18.9 km
Ohio State University (Aéroport) 22.4 km
Ashland Aéroport 23.7 km
Bolton Field 25.8 km
Delaware Aéroport 27.8 km
Marion Municipal (Aéroport) 28.6 km
Fairfield County (Aéroport) 36.3 km
Big Sandy Regional (Aéroport) 37.5 km
Jonesville Aéroport 40.8 km
Jackson Julian Carr 43.6 km
Aéroport Tri-State 44.8 km
Harrow CDA (AUT) 45.6 km
Windsor Aéroport 48.2 km
Union County (Aéroport) 48.9 km
Coleman A. Young Intl. Airport 50.4 km
Grosse Ile Municipal (Aéroport) 50.5 km
Harlan Aéroport 51.8 km
Lonesome Pine (Aéroport) 52.5 km
Knox County (Aéroport) 52.9 km
Selfridge Air National Guard Base 55.0 km
Mansfield Lahm Regional (Aéroport) 56.4 km
Oconee County Regional (Aéroport) 56.6 km
Oakland/Troy (Aéroport) 57.1 km
Morristown Aéroport 58.2 km
Newark- Heath (Aéroport) 58.5 km
London Madison County Airport 59.1 km
Pickens County (Aéroport) 61.1 km
Aéroport métropolitain de Détroit 63.1 km
Anderson Aéroport 64.3 km
Aéroport régional d'Asheville 64.3 km
Point Pelee CS 66.0 km
Toccoa (Aéroport) 67.3 km
Toledo Executive (Aéroport) 68.4 km
Custer (Aéroport) 68.6 km
Tri-Cities Regional (Aéroport) 69.2 km
Franklin Aéroport 69.8 km
Oakland 73.5 km
St. Clair 74.9 km
Willow Run (Aéroport) 79.5 km
Gordon K. Bush (Aéroport) 80.5 km
Findlay (Aéroport) 85.1 km
Donaldson Center (Aéroport) 85.2 km
Greenville Downtown (Aéroport) 86.7 km
Toledo Suburban (Aéroport) 87.6 km
Fleming-Mason (Aéroport) 88.3 km
Middlesboro Aéroport 91.8 km
Elizabethton Aéroport 92.9 km
Lorain 93.3 km
Sarnia-Chris Hadfield (Aéroport) 93.8 km
Point Pleasant Aéroport 94.8 km
Wilmington Aéroport 95.0 km
Greenville-Spartanburg (Aéroport) 98.4 km
Ann Arbor Municipal (Aéroport) 98.7 km
Bellefontaine Regional (Aéroport) 99.0 km
Springfield 99.3 km
Toledo Express (Aéroport) 101.5 km
Aéroport international Bishop de Flint 104.4 km
Abingdon 106.3 km
Greenwood 110.2 km
Western Carolina Regional (Aéroport) 111.2 km
Lee Gilmer Memorial (Aéroport) 113.7 km
Aéroport municipal de Zanesville 118.2 km
Aéroport municipal de Zanesville 118.2 km
Lima Allen 120.6 km
McGhee Tyson (Aéroport) 120.8 km
Wayne County (Aéroport) 122.5 km
Rutherfordton 123.0 km
Wright-Patterson Air Force Base 123.2 km
Spartanburg Downtown Memorial (Aéroport) 123.8 km
Livingston County Spencer J. Hardy (Aéroport) 125.2 km
Cleveland-Hopkins (Aéroport) 126.9 km
Laurens County (Aéroport) 127.5 km
Chatham-Kent 127.7 km
London-Corbin (Aéroport) 127.8 km
Richlands Aéroport 130.5 km
Ridgetown 130.6 km
Dayton (Aéroport) 130.6 km
Aéroport du comté de Lenawee 131.7 km
Fulton County (Aéroport) 135.9 km
Clermont County (Aéroport) 140.4 km
Owosso Community (Aéroport) 142.6 km
Dayton- Wright Brothers (Aéroport) 143.3 km
Oak Ridge 146.8 km
Cleveland Burke Lakefront (Aéroport) 147.0 km
Aéroport Yeager de Charleston 150.4 km
Pineville Aéroport 155.8 km
Foothills Regional (Aéroport) 158.2 km
Shelby Aéroport 158.9 km
Newberry County (Aéroport) 159.9 km
Cincinnati Municipal Lunken (Aéroport) 163.5 km
Defiance Memorial (Aéroport) 166.3 km
Akron Executive (Aéroport) 168.7 km
Cuyahoga County (Aéroport) 168.7 km
Mid-Ohio Valley Regional (Aéroport) 169.1 km
Mason Aéroport (Aéroport) 170.5 km
Aéroport régional d'Akron-Canton 172.0 km
Cherokee County Regional (Aéroport) 172.5 km
Harry Clever Field (Aéroport) 172.7 km