World

North America



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