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What is Yr?● Yr is Norwegian for drizzle● www.yr.no, m.yr.no, Apps● Collaboration between NRK and Met Norway
– Presentation
– Scientific content and quality
● Based on an open data policy● Commercial free● Met Norway's main channel for publishing weather forecasts to
the public● The world's 5th biggest weather service (according to Alexa)● ~1,000,000 site specific location forecasts for Norway
– ~10,000,000 world wide
– location data base
●
Yr – a multimodal text
AROME-MetCoOp
ECMWF IFS
Forecast uncertainty- No forecast is complete without a forecast of forecast skill
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500,000
1,000,000
1,500,000
2,000,000
2,500,000
3,000,000
3,500,000Unique weekly users2007-2010
2 Million
June 2007 Dec 2010
How do we work - Organization of Yr at Met Norway
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.kdlanskld.nas,mnd.,msan.dmasn,mdb.aß,d
Head of Yr
Projects
Activities
Directorate=Steering group
4 Million
2 Million
6 Million
8 Million
Number of weekly users – all platforms
Jan 2011 Jul 2014
Open data policy- requests per day to varsel.xml/forecast.xml
July 2014
Open data policy- request per day to api.met.no
90 Million
60 Million
2012 2013 2014
User confidence- all age groups
2007 2008 2009 2010 2011 2012 20130
5
10
15
20
25
30
35
40
45
50
YrNRK TVTV2Met Norwaystorm.no/TV2NRK Radio
Year
%
Forecast quality
Temperature
Precipitation
Good
2008 2011 2014
2008 2011
Orange plus green = fraction of good precipitation forecasts
Wind speed
Medium- to long-range forecastsSummer Precipitation – frequency of
events
Climatology Dry
Raw Yr
Dry
Light
Heavy
Forecast range (hours)
Forecast range (hours)
40%
80%
Communicating forecast skill
User interaction
● yr@met.no● @meteorologene● om.yr.no
Communication challenge
Reading of science 1,000 – 20,000 readers20,000 – 150,000 readers
Questions?
Weather on mobile platforms
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