ECMWF - European Centre for Medium-Range Weather Forecasts.
http://en.wikipedia.org/wiki/European_Centre_for_Medium-Range_Weather_Forec…
The 4km resolution is from private email correspondence and is for
Northern Europe. The four hour cycle is from memory, it should be four
times a day.
From other correspondance "EVWMF validerer
(etterkontrollerer) varsla
sine (som våre byggjer på) på eit overordna europeisk
nivå. Dei gjer
sikkert validering på verdsnivå òg, utan at eg har sett rapportar på
dette. Valideringane som blir gjort, viser at prognosane er svært
treffsikre (90-95%) dei fyrste dagane, og at det fell ned mot 60% for
dag 10 i prognosen."
That is, the EVWMF validates their own weather forecasts on a large
scale level and the hit rate for the first few days is around 90-95%.
I'm not sure what they are measuring. Later that goes down to a 60% hit
rate for day 10.
I'm not sure about how the rest of the world are modeled, the grid
resolution, etc.
John
John at Darkstar wrote:
Wikimedia Norway have had a meeting with Meteorologisk
Institutt
(
http://met.no) in Norway about using the dataset published by the
institute. Today the dataset is used for the service Yr.no
(
http://yr.no), a joint venture between them and Norwegian Broadcasting
Corporation (
http://nrk.no). Met said it would be pleased if the data
could be utilized somehow, later this was confirmed by NRK.
The dataset is localized to within 4km in Norway and updated in about 4
hour cycles. There are available lookup for 7.5 million places around
the world, and 700 000 places in Norway. Base data are the HIRLAM model
(High Resolution Limited Area Model) and the EC model from The European
Weathercenter ECWMF. HIRLAM has 10 km resolution of the grid. When
requesting data for named places the data from the grid is interpolated
to build the new weather forecast.
The dataset is made available with an open license, they request
attribution and "truthful reproduction", basically you can't say it is
from Met and falsify the dataset. You can't add a few degrees to make
the weather look better at a certain place and still claim its sourced
from Met. This is analogous to editing a news photo at Commons so its
not a truthful reproduction of the event anymore. There are one
disclaimer for sites with pornographic or racist content which may be
troublesome for a CC-by-sa -licensed site. They do although allow use on
commercial sites. Other than that the licensing should be given due
consideration.
My personal opinion is that they should be kindly asked to make the
dataset available according to CC-by-sa to make reuse easier.
Our proposal to Met/NRK was to make an extension that could be localized
for various languages, based on the XML-data streamed from their site,
and to use something like this for Wikinews. Unfortunately we have not
been able to get sufficient funding for the project. We also need some
backing from the community if this should be considered a viable project.
Short information in english about Yr.no
http://www.yr.no/english/1.2025949
Page about licensing (in Norwegian)
http://www.yr.no/verdata/1.3321307
Page about services available (in Norwegian)
http://www.yr.no/verdata/
Some locations
http://www.yr.no/place/Norway/Oslo/Oslo/
http://www.yr.no/place/Bouvet_Island/
http://www.yr.no/place/Norway/Finnmark/B%C3%A5tsfjord/Makkaur/
http://www.yr.no/place/United_States/New_York/New_York~5128581/
http://www.yr.no/place/China/Xinjiang/%C3%9Cr%C3%BCmqi/
Page about how the weather forecast is made (in Norwegian)
http://www.yr.no/informasjon/1.3687572
John Erling Blad
Wikimedia Norway
Tris Thomas wrote:
Dear All,
I don't know whether this has been discussed before, apologies if it has.
I'm interested in people's thoughts on a new Wikimedia project-maybe
WikiWeather, which basically would do what it says on the tin. Along
with importing national weather from other sources(especially to begin
with), contributors could then put their weather where they are. This
could evolve into many contributors giving very localised weather
forecasts worldwide, which could be used by many of the other projects
and anybody else.
Would people be interested in this proposal/have any thoughts on it?
Thanks!
Wikinews User Page <http://en.wikinews.org/wiki/User:Tristan%20Thomas>
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