Deutscher Wetterdienst VERSUS at DWD Ulrich Damrath & Ulrich Pflüger COSMO GM Rome, September 2011

DWD , Ulrich Damrath & Ulrich Pflüger September 2011 State of work with DWD  Regular work with VERSUS  Submission of data for the common plots was done  Graphics and text files were produced for a lot of cases  Weather-type dependent verification in VERSUS was introduced  Work was done for some special cases  Work was not done in a quasi operational mode  Conditional verification and stress test  No quasi operational use of conditional verification  Stress test was not performed  WHY?

DWD , Ulrich Damrath & Ulrich Pflüger September 2011 Severe problems with DWD - 1  Access to mysql-database  Execution is sometimes very slow – probably because of the large size of the file ibdata1 in the mysql-directory (currently: 0.9 TByte).  Filotea gave some hints to overcome these problem, but the execution of the recommended data base requests need some time …  There was no disk space to introduce the stress-test data.  Access may be disturbed during an active loader phase.  Large time to wait for a response or  Interrupt of score calculation  php-problems  At browser sessions that are not direcly carried out at the versus server php dies after about one hour  At browser sessions that are directly carried out at the versus server this problem does not occur.  Software problems:  Decoding of bufr data did not work correctly for observations at 06 UTC (starting in March 2011)  Filotea gave the advice to install bufr_dc version And it worked!  Some input data had to be recalculated.  More …

DWD , Ulrich Damrath & Ulrich Pflüger September 2011  The running state of the loader cannot be controlled!!!  Loader cannot be stopped via the browser menu!  Processes appear to be stopped – but they are running!  Pressing the -button leads to a new loader process that has to be killed manually – if it can be catched  If the loader is really active with GRIBs the process is active for some seconds and can be killed.  If the loader is waiting for new files it generates a new process every second or so. This process is not easy to kill.  More … Severe problems with DWD - 2

DWD , Ulrich Damrath & Ulrich Pflüger September 2011 Severe problems with DWD - 3 More …

DWD , Ulrich Damrath & Ulrich Pflüger September 2011 Severe problems with DWD - 4 Nevertheless …

DWD , Ulrich Damrath & Ulrich Pflüger September 2011 Some typical examples: CEU T 2m forecasts July 1010

DWD , Ulrich Damrath & Ulrich Pflüger September 2011 Some typical examples: CDE T 2m forecasts July 1010

DWD , Ulrich Damrath & Ulrich Pflüger September 2011 Some typical examples: CEU TDEW 2m forecasts July 1010

DWD , Ulrich Damrath & Ulrich Pflüger September 2011 Some typical examples: CDE TDEW 2m forecasts July 1010 And lots of others …

DWD , Ulrich Damrath & Ulrich Pflüger September 2011 Current state  VERSUS is on the way to be operational at DWD  Operational suite has to be defined for  Standard verification  Conditional verification  Model intercomparison …  This can be done if the current problems are solved.  Open question: What will happen if the feedback files from assimilation will be introduced into VERSUS?