Yr.no is a weather service Internet, which is the Norwegian Broadcasting Corporation ( NRK) and the Norwegian Meteorological Institute (NMI ) operated in cooperation. The word means yr translates as light drizzle, but also delighted, dizzy, boundless and wild.
The service provides its own account weather forecasts for over 8.3 million different places on the entire planet ready. The special feature is the " exact hours " available for most locations (Norwegian "time for time ", English "hour by hour" ) continuous representation in the form of Meteo -gram over the expected course of the weather. The presentation of the forecasts of local weather is so much more detailed than in the conventional representation in the Internet and print media, are presented separately in the spaced every day for three cards for a few hours daily sections. The service is by his own admission the first provider of free, detailed weather information.
In addition, related services are provided, such as weather radar, satellite images and pollen forecast. Much of the information offered also be provided in the form of XML feeds.
The numerous, largely norway related meteorological messages and additional information are mainly written in Bokmål and Nynorsk, the basic operation of the prediction query function and selected messages are also available in English, North Sami and Kvenisch.
Operation of stationary accurate prediction
The predictions at yr.no based on different models, including the Norwegian HIRLAM (High Resolution Limited Area Model) and the EC- model of the European Centre for Medium- Range Weather Forecasts ( ECMWF, Reading, England). The earth is virtually covered with a grid whose points of intersection for example, have a vertical and horizontal spacing of 10 km in northern Europe; for each of these grid points own prediction is being made in the data center.
For a place that is not exactly on one of the grid points, the coordinates and altitude information from the GeoNames database to be read. On the basis of which the distance of the site will be determined at the four closest grid nodes and determined based on a weighted average according to distance from the calculated weather forecasts of these four points. Finally, a height correction is made - especially at the correct temperature to be able to calculate, as they have varied at the same place by the atmospheric temperature with height.
Yr.no used data and media content from the following partners:
- Kvensk institutt ( kvenskinstitutt.no )
- Norske Institutt Meteorologisk
- Noregs vassdrags -og energidirektorat ( NVE, nve.no )
- Norsk Polarinstitutt ( npolar.no )
- Scientific Committee on Antarctic Research
- Statens kartverk ( statkart.no )
- Science Museum of NTNU
The service has started on 19 September 2007 as an extension of a 70 -year collaboration between NRC and DNMI and quickly became very popular in Norway. Already three quarters of a year after the launch of the service ( ie in June 2008) he was just under 90 % of the Norwegian population known and reported 1.3 million users ( unique users ) per week. In 2010 visited from 1.4 to 3.1 million people per week, the side of which in the summer of 2010 about 70 % from Norway, 25 % in Sweden and 5 % from the rest of the world came. In 2012 there were over 2.5 million, and during the summer months to 4.6 million unique users per week, with the second third of the year was the visitors Strongest as in previous years.