Gempak sounding file creation

[Polly_LO]

Good day!

 

I recently work with meteorological data and begin to dig how the GEMPAK and BUFKIT are working. And some points is not clearly for me.

 

So I had a few questions :

 

1) I want to create sounding or surface files from model data (I try to use my calculated WRF grid-files, after Unified Post Processor(UPP) processing in grib2 format) for BUFKIT. I've read the guide to the GEMPAK and understood that I can  work only with  Gridded Data function (!?), because I have fields data.

Can I interpolate the data that I have to necessary city or station.

More specifically , Can I create sounding files from grid-data files with GEMPAK tools?

 

I want to do that because I can't find models sounding data (.buf) for my station on servers like http://www.meteo.psu.edu/bufkit/CONUS_NAM_06.html?

.

2) Also, I try to create files for sounding files for proccess them in BUFKIT. There are many files for BUFKIT on http://www.meteor.iastate.edu/ ~ ckarsten / bufkit / data / , also for European cities ( Moscow, Berlin and others ) .And I also can't find data for my station.

 

Are there any third-party tools or scripts to create files for the bufkit (.buf) from my own models data manualy? 

 

I apologize in advance for the simple questions, I'm just learning)

[ohleary]

 

Good day!

 

I recently work with meteorological data and begin to dig how the GEMPAK and BUFKIT are working. And some points is not clearly for me.

 

So I had a few questions :

 

1) I want to create sounding or surface files from model data (I try to use my calculated WRF grid-files, after Unified Post Processor(UPP) processing in grib2 format) for BUFKIT. I've read the guide to the GEMPAK and understood that I can  work only with  Gridded Data function (!?), because I have fields data.

Can I interpolate the data that I have to necessary city or station.

More specifically , Can I create sounding files from grid-data files with GEMPAK tools?

 

I want to do that because I can't find models sounding data (.buf) for my station on servers like http://www.meteo.psu.edu/bufkit/CONUS_NAM_06.html?

.

2) Also, I try to create files for sounding files for proccess them in BUFKIT. There are many files for BUFKIT on http://www.meteor.iastate.edu/ ~ ckarsten / bufkit / data / , also for European cities ( Moscow, Berlin and others ) .And I also can't find data for my station.

 

Are there any third-party tools or scripts to create files for the bufkit (.buf) from my own models data manualy? 

 

I apologize in advance for the simple questions, I'm just learning)

 

 

1) I am going to assume you have installed both GEMPAK and Bukfit.  First, convert your grib2 file to GEMPAK format using the "nagrib2" program.  This is pretty straightforward.  Then, to create sounding plots on a skew-T, which is I am assuming what you want, use the "gdprof" program on your newly created GEMPAK file. There is a good example of settings to do so at the bottom of this page:

 

http://www.unidata.ucar.edu/software/gempak/tutorial/vertical_plotting.html

 

2) This link:

 

http://strc.comet.ucar.edu/software/bgruven/

 

provides the software to work with GEMPAK and create Bufkit sounding files from NCEP bufr sounding data.  I've never used it but it seems pretty straightforward if you have Linux, and likely the easiest way to do it.  I can see it's probably Bob Rozumalski's documentation, there are always many funny tidbits thrown in, entertaining to read!

 

More questions, just ask!

[Polly_LO]

1) I am going to assume you have installed both GEMPAK and Bukfit.  First, convert your grib2 file to GEMPAK format using the "nagrib2" program.  This is pretty straightforward.  Then, to create sounding plots on a skew-T, which is I am assuming what you want, use the "gdprof" program on your newly created GEMPAK file. There is a good example of settings to do so at the bottom of this page:

 

http://www.unidata.ucar.edu/software/gempak/tutorial/vertical_plotting.html

 

2) This link:

 

http://strc.comet.ucar.edu/software/bgruven/

 

provides the software to work with GEMPAK and create Bufkit sounding files from NCEP bufr sounding data.  I've never used it but it seems pretty straightforward if you have Linux, and likely the easiest way to do it.  I can see it's probably Bob Rozumalski's documentation, there are always many funny tidbits thrown in, entertaining to read!

 

More questions, just ask!

Thanks for the answer! It was very useful)

 

1)I've installed BUFKIT and GEMPAK  and tried to create profiles using these program. I successfully created Skew-T profile from my gridded data. But I have new problem. I can not plot both temperature and dewpoint at the same time, when I use "gdprof" or "gdcross"?! And as I understand I can use these program only for gridded data. Also I need special sounding files, for use SNPROF.

 

2)Well, aslo I've installed Bgruven. It is very straightforward and I used it.

I noticed that I can dowload and generate files only for station, that I have in list in "_bufrstations.txt" files. My station isn't at that lists. After these I tried to find NCEP bufr sounding data for my station on NCEP servers. And I didn't find.

 

That is why I have some new questions:

1)Can I create bufr sounding data from model gridded data? Or how can I interpolate my model data for station to use their for BUFKIT? What software do you usually use for interpolation gridded data?

2)How can I create files like this http://www.meteor.iastate.edu/~ckarsten/bufkit/data/gfsm/gfs3_007149.buf? What software is used for creation of these files?

 

 

Thank you for reply!

[ohleary]

 

Thanks for the answer! It was very useful)

 

1)I've installed BUFKIT and GEMPAK  and tried to create profiles using these program. I successfully created Skew-T profile from my gridded data. But I have new problem. I can not plot both temperature and dewpoint at the same time, when I use "gdprof" or "gdcross"?! And as I understand I can use these program only for gridded data. Also I need special sounding files, for use SNPROF.

 

2)Well, aslo I've installed Bgruven. It is very straightforward and I used it.

I noticed that I can dowload and generate files only for station, that I have in list in "_bufrstations.txt" files. My station isn't at that lists. After these I tried to find NCEP bufr sounding data for my station on NCEP servers. And I didn't find.

 

That is why I have some new questions:

1)Can I create bufr sounding data from model gridded data? Or how can I interpolate my model data for station to use their for BUFKIT? What software do you usually use for interpolation gridded data?

2)How can I create files like this http://www.meteor.iastate.edu/~ckarsten/bufkit/data/gfsm/gfs3_007149.buf? What software is used for creation of these files?

 

 

Thank you for reply!

 

 

Old questions:

 

1) You need to run the gdprof program twice.  Once to plot your temp and again on the same device to plot your dewpoint.  Go down to exercise 21/22 on this page...it's shown very clearly:

 

http://www.unidata.ucar.edu/software/gempak/tutorial/vertical_plotting.html

 

2) Yes, I don't see Minsk (if that is the station you want) in the station list for the GFS.   Nothing terribly close either.  Here is the station list:

 

http://www.nco.ncep.noaa.gov/pmb/codes/nwprod/parm/bufr_stalist.meteo.gfs3

 

New questions:

 

1) Short answer yes, you can create bufr sounding data from gridded GFS data.  You could code it yourself, or use NCEP codes which are freely available.  It would take a bit of time and a little computing power.  But...the files used to create the profiles are very large.  You'd need to download these to create your profile...one cycle would be a download of about 42 GB of data.  That and editing/running the scripts for one station seems like a lot of work for a sounding.  As far as the second part, Bgruven is the only software I'm aware of that creates Bufkit files, and it uses bufr as input.

 

2) You create files like that using Bgruven I believe.  It's possible they are using something else, you'd have to ask IA State.

 

Or you could ask someone in Minsk to contact NCEP/NCO and request that a Minsk bufr profile be added.  Belarus weather service maybe?