Search found 9 matches

by Ben Lankamp
Wed Jun 18, 2014 7:45 pm
Forum: Hardware for running WRF / EMS
Topic: WRF EMS Benchmark results and hardware
Replies: 160
Views: 77637

Re: WRF EMS Benchmark results and hardware

New system, we only run ARW core so here are the results for the ARW large benchmark simulation: Basic System Information for WRF System OS : Linux Linux Distribution : Debian 7.5 OS Kernel : 3.2.0-4-amd64 Kernel Type : x86_64 Processor and Memory Information for WRF CPU Name : Intel(R) Xeon(R) CPU ...
by Ben Lankamp
Thu Sep 26, 2013 11:47 am
Forum: EMS Hacking
Topic: SOLUTION for gfsptiles/gfs not being available or too slow
Replies: 31
Views: 17249

Re: SOLUTION for gfsptiles/gfs not being available or too slow

Hello, I haven't checked, but I believe that combining A+B gives you the maximum of elements and levels. I do not filter anything, so WRF EMS can take whatever it needs.

Regards, Ben
by Ben Lankamp
Fri Aug 23, 2013 1:08 pm
Forum: EMS Hacking
Topic: SOLUTION for gfsptiles/gfs not being available or too slow
Replies: 31
Views: 17249

Re: SOLUTION for gfsptiles/gfs not being available or too slow

You are right about the variables available for running WPS/WRF, however the B-files contain additional levels of temperature, etc. (at x25 and x75 mb) that improve the initialization and forecast, when you specify 40+ levels in the model. We found a significant reduction in error of surface winds, ...
by Ben Lankamp
Thu Aug 22, 2013 6:09 pm
Forum: EMS Hacking
Topic: SOLUTION for gfsptiles/gfs not being available or too slow
Replies: 31
Views: 17249

Re: SOLUTION for gfsptiles/gfs not being available or too slow

We use the get_gfs.pl Perl script from NCEP for downloading GFS boundary and initialization data from NCEP (bypassing nomads). We have two copies of the script: one for the GFS A-files and one for the B-files (with extended levels and variables). The $URL variable in the Perl scripts is set to http:...
by Ben Lankamp
Wed Jul 17, 2013 6:20 pm
Forum: EMS v3.4 support
Topic: extract data from wrf-ems for weather forecast
Replies: 70
Views: 32789

Re: extract data from wrf-ems for weather forecast

I don't really know about PHP and MySQL, but in Microsoft SQL Server we use a simply BULK INSERT statement to insert hundreds of thousands of records in less than a second. After a quick search on Google, the LOAD DATA INFILE statement for MySQL turned up and seems to do the same (and with roughly t...
by Ben Lankamp
Tue Jul 16, 2013 9:51 pm
Forum: EMS v3.4 support
Topic: extract data from wrf-ems for weather forecast
Replies: 70
Views: 32789

Re: extract data from wrf-ems for weather forecast

We have GrADS v2.0.2 on our system, perhaps you have an older/newer version. The asterisks should normally be accepted as comment lines, they should not generate errors in GrADS. That would be my first clue in investigating your problems. Perhaps re-install/rebuild GrADS? The script we use is intent...
by Ben Lankamp
Mon Jul 15, 2013 5:22 pm
Forum: EMS v3.4 support
Topic: extract data from wrf-ems for weather forecast
Replies: 70
Views: 32789

Re: extract data from wrf-ems for weather forecast

Hello Dominic, did you change the first line of my script to open your WRF output? GrADS strips comment lines, so 'line 1' is actually line 2 in the GrADS script file. The script assumes you have GrADS-ready files from the EMS Post-Processor (.ctl, .idx and GRIB2 files). I run the script from the sh...
by Ben Lankamp
Sun Jul 14, 2013 6:01 pm
Forum: EMS v3.4 support
Topic: extract data from wrf-ems for weather forecast
Replies: 70
Views: 32789

Re: extract data from wrf-ems for weather forecast

This is the script I made for saving time series for given locations (by lat lon and an arbitrary locationid). It will save the basic meteorological variables in use for general weather forecasting, such as temperature and dewpoint 2 metres, surface wind speed and gust, downdwelling radiation, cloud...
by Ben Lankamp
Thu Jun 17, 2010 1:26 pm
Forum: Legacy EMS (WRFEMS 3.2 and lower) support
Topic: Globcover in WRF-EMS
Replies: 14
Views: 6653

Re: Globcover in WRF-EMS

I've tried to use the MODIS land use data, which came with the latest STRC WRF-EMS release, but I had no luck getting that to work. The land use from USGS is really outdated for the area which I run the model for (The Netherlands), so I started looking into using MODIS or perhaps Globcover. However ...