Recent development at met no EGOWS 2009 Juergen

Recent development at met. no EGOWS 2009 Juergen Schulze Audun Christoffersen Magnus Ovhed Bjørn K. Larsen

• Norway's largest on-line weather service launched September 2007 – The aim is to make our data as accessible to the public as possible – 87% of Norwegian internet users know of yr. no – 23% use it on a daily basis Norwegian Meteorological Institute met. no

Norwegian Meteorological Institute met. no

Nåværende langtidsvarsel • EPS: 51 værsymboler

yr. no back-end architecture • This is all based on open source software • WDB (Weather and Water Data. Base) is now running operationally Norwegian Meteorological Institute met. no

Diana development • Visualization and production software used operationally by met. no – Open Source project available from svn. met. no • Operational OS changed to Ubuntu • New features – – – WDB support Video exporting New file structure (Linux FHS) to simplify debian packages Modular field handling to ease support for more formats Further development in the field editing system New zoom functionality. . . etc. • Internal improvements and bugfixes (surprise) Norwegian Meteorological Institute met. no

SMHI cooperation • Testing diana in an operational environment now • Developed new features (their requirements) – GRIB fields, vertical cross-sections and time series – HDF 5 satellite and radar images – Shape maps • All code merged in version control by met. no (public available) • A few annual meetings, otherwise e-mail communication and shared bugzilla Norwegian Meteorological Institute met. no

Automated Text Forecast • Forecasters use a lot of time on writing text forecasts (12 h/day in Bergen) • Less manual end-product making, more weather analyses and data improvement • Existing systems – Did not meet our requrements – Integrated part of a larger production system – Too expensive to buy without a tender offer Norwegian Meteorological Institute met. no

PROSA • • • Development started in 2008 at met. no Open source project written in C++ Can be used as a framework Very limited documentation Starting with sea forecast (no local effects due to topography) • Will run semi-automated in operational use this autumn (generating text proposals) Norwegian Meteorological Institute met. no

How does it work Parameter Time period Area Grid Data Manager Data Source Statistics Generator Norwegian Meteorological Institute met. no

Symbols and base-stories / ~ ^ o : : : Unchanged Increasing Decreasing Varying Local Maximum Insignificant Symbol Set: / - Base-story: VALUE(DD, TIME. 1. START) VALUE(FF, TIME. 1. START), TIME. 1. FT(FF) increasing IF( changed(DD, TIME. 1. START, TIME. 1. END) ) { VALUE(DD, TIME. 1. END) } VALUE(FF, TIME. 1. END) IF( changed(DD, TIME. 2. START, TIME. 2. END) ) {, from TIME. 2. START VALUE(DD, TIME. 2. END) } , TIME. 3. FT(FF) decreasing IF( changed(DD, TIME. 3. START, TIME. 3. END) ) { VALUE(DD, TIME. 3. END) } VALUE(FF, TIME. 3. END) Forecast text: North force 4, late Thursday morning increasing near gale force 7, Friday morning decreasing to east force 4 Norwegian Meteorological Institute met. no