[Met_help] [rt.rap.ucar.edu #65954] History for Precip/MODE verification issues
John Halley Gotway via RT
met_help at ucar.edu
Tue Mar 25 09:45:41 MDT 2014
----------------------------------------------------------------
Initial Request
----------------------------------------------------------------
Good morning,
I am attempting to use MODE to verify some WRF model output via UPPV2.0 to gridded observed precipitation data (see link here for the observed precip dataset I am using: http://data.eol.ucar.edu/codiac/dss/id=21.093). The two data sets are not of the same projection, spatial resolution or domain size (please see error below), and I would like to seek your help on how to get these two datasets to have the same properties such that MODE can be utilized in verifying the WRF data upon this observed data. I have reviewed the met_help archives and did not find a similar case as this. Also, please note that I attempted to ftp some data and observed files to go with this email, but the ftp did not work. I will be happy to hear whatever advice you may be able to offer, and I will be happy to send along any additional information or files you need to help me solve this issue.
*** Running MODE on APCP using a GRIB forecast and netCDF observation ***
DEBUG 1: Default Config File: /opt/storage/high-speed/EMT2/METv4.1/METv4.1/data/config/MODEConfig_default
DEBUG 1: Match Config File: /opt/storage/high-speed/EMT2/METv4.1/METv4.1/data/config/MODEConfig_default
DEBUG 1: Merge Config File: /opt/storage/high-speed/EMT2/METv4.1/METv4.1/data/config/MODEConfig_default
DEBUG 1: Forecast File: /opt/storage/high-speed/EMT2/UPPVspace/postprd/old_WRF/2011026/WRFPRS_d01.24
DEBUG 1: Observation File: /opt/storage/high-speed/EMT2/2011MetData/precip/ST4.2011012612.24h
ERROR :
ERROR : process_fcst_obs_files() -> The forecast and observation grids do not match: Projection: Lambert Conformal Nx: 471 Ny: 311 Lat_LL: 20.857 Lon_LL: 121.492 Lon_orient: 97.000 Alpha: 1037.975 Cone: 0.630 Bx: 218.5427 By: 791.1670 != Projection: Stereographic Nx: 1121 Ny: 881 IsNorthHemisphere: true Lon_orient: 105.000 Bx: 399.440 By: 1599.329 Alpha: 2496.0783
ERROR :
Thank you for your time,
Elliot Tardif, Meteorologist II
NC DENR, Division of Air Quality
Planning Section, Attainment Planning Branch
1641 Mail Service Center
Raleigh, NC 27699-1641
Phone/Fax: 919-707-8483
Email: Elliot.Tardif at ncdenr.gov<mailto:Nick.Witcraft at ncdenr.gov>
Web : http://www.ncair.org<http://www.ncair.org/>
Email correspondence to and from this address is subject to the North Carolina Public Records Law and may be disclosed to third parties unless the content is exempt by statue or other regulation.
----------------------------------------------------------------
Complete Ticket History
----------------------------------------------------------------
Subject: Re: [rt.rap.ucar.edu #65954] Precip/MODE verification issues
From: John Halley Gotway
Time: Mon Mar 24 13:11:56 2014
Elliot,
It see that you'd like to compare the GRIB output of UPP to the
StageIV precipitation analysis product, which is also available in
GRIB format. But you'll need to put the two products on a common
grid in order for the MET grid-to-grid tools (like MODE and Grid-Stat)
to compare them. The good news is that this is a pretty straight-
forward, easy thing to do.
But you first must decide the grid on which you'd like to do the
verification. You could...
(1) Interpolate the forecast data to the StageIV grid.
(2) Interpolate the StageIV data to the forecast grid.
(3) Or interpolate both of them to some other grid.
There are pros/cons to each approach, and it will likely depend on how
the spatial coverage and resolution of the two grids compare.
In either case, you'll use the "copygb" utility to regrid the GRIB
data files. copygb is a utility that's included with the UPP package,
so you should already have it installed. Examples of running
copygb for different projection types can be found in the MET online
tutorial:
http://www.dtcenter.org/met/users/support/online_tutorial/METv4.1/copygb/index.php
Just click the right arrow at the bottom of the page to advance
through the copygb information and examples. The trickiest part is
figuring out how to define the desired output grid on the command
line. But those tutorial examples should help a lot.
Just let me know if you get stuck and need more help.
One additional consideration is the accumulation interval. Since
you're comparing precipitation, you'll need to make sure the
accumulation intervals match up between the two. After you've put
your
datasets onto a common grid, you may need to run the MET pcp_combine
tool to get them into a common accumulation interval (e.g. comparing
24-hour model precip to the 24 hours of the StageIV analysis).
Thanks,
John
On 03/24/2014 10:56 AM, Tardif, Elliot M via RT wrote:
>
> Mon Mar 24 10:56:39 2014: Request 65954 was acted upon.
> Transaction: Ticket created by elliot.tardif at ncdenr.gov
> Queue: met_help
> Subject: Precip/MODE verification issues
> Owner: Nobody
> Requestors: elliot.tardif at ncdenr.gov
> Status: new
> Ticket <URL:
https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=65954 >
>
>
> Good morning,
>
> I am attempting to use MODE to verify some WRF model output via
UPPV2.0 to gridded observed precipitation data (see link here for the
observed precip dataset I am using:
http://data.eol.ucar.edu/codiac/dss/id=21.093). The two data sets are
not of the same projection, spatial resolution or domain size (please
see error below), and I would like to seek your help on how to get
these two datasets to have the same properties such that MODE can be
utilized in verifying the WRF data upon this observed data. I have
reviewed the met_help archives and did not find a similar case as
this. Also, please note that I attempted to ftp some data and
observed files to go with this email, but the ftp did not work. I
will be happy to hear whatever advice you may be able to offer, and I
will be happy to send along any additional information or files you
need to help me solve this issue.
>
> *** Running MODE on APCP using a GRIB forecast and netCDF
observation ***
> DEBUG 1: Default Config File: /opt/storage/high-
speed/EMT2/METv4.1/METv4.1/data/config/MODEConfig_default
> DEBUG 1: Match Config File: /opt/storage/high-
speed/EMT2/METv4.1/METv4.1/data/config/MODEConfig_default
> DEBUG 1: Merge Config File: /opt/storage/high-
speed/EMT2/METv4.1/METv4.1/data/config/MODEConfig_default
> DEBUG 1: Forecast File: /opt/storage/high-
speed/EMT2/UPPVspace/postprd/old_WRF/2011026/WRFPRS_d01.24
> DEBUG 1: Observation File: /opt/storage/high-
speed/EMT2/2011MetData/precip/ST4.2011012612.24h
> ERROR :
> ERROR : process_fcst_obs_files() -> The forecast and observation
grids do not match: Projection: Lambert Conformal Nx: 471 Ny: 311
Lat_LL: 20.857 Lon_LL: 121.492 Lon_orient: 97.000 Alpha: 1037.975
Cone: 0.630 Bx: 218.5427 By: 791.1670 != Projection: Stereographic Nx:
1121 Ny: 881 IsNorthHemisphere: true Lon_orient: 105.000 Bx: 399.440
By: 1599.329 Alpha: 2496.0783
> ERROR :
>
> Thank you for your time,
>
> Elliot Tardif, Meteorologist II
> NC DENR, Division of Air Quality
> Planning Section, Attainment Planning Branch
> 1641 Mail Service Center
> Raleigh, NC 27699-1641
> Phone/Fax: 919-707-8483
> Email: Elliot.Tardif at ncdenr.gov<mailto:Nick.Witcraft at ncdenr.gov>
> Web : http://www.ncair.org<http://www.ncair.org/>
>
> Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third
parties unless the content is exempt by statue or other regulation.
>
------------------------------------------------
Subject: RE: [rt.rap.ucar.edu #65954] Precip/MODE verification issues
From: Tardif, Elliot M
Time: Mon Mar 24 15:45:49 2014
Good afternoon John, I am happy to report that the link you gave me
regarding the use of copygb has helped me solve this problem. I
converted the observed data grid to the forecast grid and ran a test,
and it proceeded to give me good data.
Thank you again for your help and have a great day!
Cheers,
Elliot Tardif, Meteorologist II
NC DENR, Division of Air Quality
Planning Section, Attainment Planning Branch
1641 Mail Service Center
Raleigh, NC 27699-1641
Phone/Fax: 919-707-8483
Email: Elliot.Tardif at ncdenr.gov
Web : http://www.ncair.org
Email correspondence to and from this address is subject to the North
Carolina Public Records Law and may be disclosed to third parties
unless the content is exempt by statue or other regulation.
-----Original Message-----
From: John Halley Gotway via RT [mailto:met_help at ucar.edu]
Sent: Monday, March 24, 2014 3:12 PM
To: Tardif, Elliot M
Subject: Re: [rt.rap.ucar.edu #65954] Precip/MODE verification issues
Elliot,
It see that you'd like to compare the GRIB output of UPP to the
StageIV precipitation analysis product, which is also available in
GRIB format. But you'll need to put the two products on a common grid
in order for the MET grid-to-grid tools (like MODE and Grid-Stat) to
compare them. The good news is that this is a pretty straight-
forward, easy thing to do.
But you first must decide the grid on which you'd like to do the
verification. You could...
(1) Interpolate the forecast data to the StageIV grid.
(2) Interpolate the StageIV data to the forecast grid.
(3) Or interpolate both of them to some other grid.
There are pros/cons to each approach, and it will likely depend on how
the spatial coverage and resolution of the two grids compare.
In either case, you'll use the "copygb" utility to regrid the GRIB
data files. copygb is a utility that's included with the UPP package,
so you should already have it installed. Examples of running copygb
for different projection types can be found in the MET online
tutorial:
http://www.dtcenter.org/met/users/support/online_tutorial/METv4.1/copygb/index.php
Just click the right arrow at the bottom of the page to advance
through the copygb information and examples. The trickiest part is
figuring out how to define the desired output grid on the command
line. But those tutorial examples should help a lot.
Just let me know if you get stuck and need more help.
One additional consideration is the accumulation interval. Since
you're comparing precipitation, you'll need to make sure the
accumulation intervals match up between the two. After you've put
your datasets onto a common grid, you may need to run the MET
pcp_combine tool to get them into a common accumulation interval (e.g.
comparing 24-hour model precip to the 24 hours of the StageIV
analysis).
Thanks,
John
On 03/24/2014 10:56 AM, Tardif, Elliot M via RT wrote:
>
> Mon Mar 24 10:56:39 2014: Request 65954 was acted upon.
> Transaction: Ticket created by elliot.tardif at ncdenr.gov
> Queue: met_help
> Subject: Precip/MODE verification issues
> Owner: Nobody
> Requestors: elliot.tardif at ncdenr.gov
> Status: new
> Ticket <URL:
https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=65954
> >
>
>
> Good morning,
>
> I am attempting to use MODE to verify some WRF model output via
UPPV2.0 to gridded observed precipitation data (see link here for the
observed precip dataset I am using:
http://data.eol.ucar.edu/codiac/dss/id=21.093). The two data sets are
not of the same projection, spatial resolution or domain size (please
see error below), and I would like to seek your help on how to get
these two datasets to have the same properties such that MODE can be
utilized in verifying the WRF data upon this observed data. I have
reviewed the met_help archives and did not find a similar case as
this. Also, please note that I attempted to ftp some data and
observed files to go with this email, but the ftp did not work. I
will be happy to hear whatever advice you may be able to offer, and I
will be happy to send along any additional information or files you
need to help me solve this issue.
>
> *** Running MODE on APCP using a GRIB forecast and netCDF
observation
> *** DEBUG 1: Default Config File:
> /opt/storage/high-
speed/EMT2/METv4.1/METv4.1/data/config/MODEConfig_de
> fault DEBUG 1: Match Config File:
> /opt/storage/high-
speed/EMT2/METv4.1/METv4.1/data/config/MODEConfig_de
> fault DEBUG 1: Merge Config File:
> /opt/storage/high-
speed/EMT2/METv4.1/METv4.1/data/config/MODEConfig_de
> fault DEBUG 1: Forecast File:
> /opt/storage/high-
speed/EMT2/UPPVspace/postprd/old_WRF/2011026/WRFPRS_
> d01.24 DEBUG 1: Observation File:
> /opt/storage/high-speed/EMT2/2011MetData/precip/ST4.2011012612.24h
> ERROR :
> ERROR : process_fcst_obs_files() -> The forecast and observation
> grids do not match: Projection: Lambert Conformal Nx: 471 Ny: 311
Lat_LL: 20.857 Lon_LL: 121.492 Lon_orient: 97.000 Alpha: 1037.975
Cone: 0.630 Bx: 218.5427 By: 791.1670 != Projection: Stereographic Nx:
1121 Ny: 881 IsNorthHemisphere: true Lon_orient: 105.000 Bx: 399.440
By: 1599.329 Alpha: 2496.0783 ERROR :
>
> Thank you for your time,
>
> Elliot Tardif, Meteorologist II
> NC DENR, Division of Air Quality
> Planning Section, Attainment Planning Branch
> 1641 Mail Service Center
> Raleigh, NC 27699-1641
> Phone/Fax: 919-707-8483
> Email: Elliot.Tardif at ncdenr.gov<mailto:Nick.Witcraft at ncdenr.gov>
> Web : http://www.ncair.org<http://www.ncair.org/>
>
> Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third
parties unless the content is exempt by statue or other regulation.
>
------------------------------------------------
Subject: Re: [rt.rap.ucar.edu #65954] Precip/MODE verification issues
From: John Halley Gotway
Time: Tue Mar 25 09:45:30 2014
Elliot,
Great, thanks for following up and letting me know.
John
On 03/24/2014 03:45 PM, Tardif, Elliot M via RT wrote:
>
> <URL: https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=65954 >
>
> Good afternoon John, I am happy to report that the link you gave me
regarding the use of copygb has helped me solve this problem. I
converted the observed data grid to the forecast grid and ran a test,
and it proceeded to give me good data.
>
> Thank you again for your help and have a great day!
>
> Cheers,
>
> Elliot Tardif, Meteorologist II
> NC DENR, Division of Air Quality
> Planning Section, Attainment Planning Branch
> 1641 Mail Service Center
> Raleigh, NC 27699-1641
> Phone/Fax: 919-707-8483
> Email: Elliot.Tardif at ncdenr.gov
> Web : http://www.ncair.org
>
> Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third
parties unless the content is exempt by statue or other regulation.
>
> -----Original Message-----
> From: John Halley Gotway via RT [mailto:met_help at ucar.edu]
> Sent: Monday, March 24, 2014 3:12 PM
> To: Tardif, Elliot M
> Subject: Re: [rt.rap.ucar.edu #65954] Precip/MODE verification
issues
>
> Elliot,
>
> It see that you'd like to compare the GRIB output of UPP to the
StageIV precipitation analysis product, which is also available in
GRIB format. But you'll need to put the two products on a common grid
in order for the MET grid-to-grid tools (like MODE and Grid-Stat) to
compare them. The good news is that this is a pretty straight-
forward, easy thing to do.
>
> But you first must decide the grid on which you'd like to do the
verification. You could...
> (1) Interpolate the forecast data to the StageIV grid.
> (2) Interpolate the StageIV data to the forecast grid.
> (3) Or interpolate both of them to some other grid.
>
> There are pros/cons to each approach, and it will likely depend on
how the spatial coverage and resolution of the two grids compare.
>
> In either case, you'll use the "copygb" utility to regrid the GRIB
data files. copygb is a utility that's included with the UPP package,
so you should already have it installed. Examples of running copygb
for different projection types can be found in the MET online
tutorial:
>
http://www.dtcenter.org/met/users/support/online_tutorial/METv4.1/copygb/index.php
>
> Just click the right arrow at the bottom of the page to advance
through the copygb information and examples. The trickiest part is
figuring out how to define the desired output grid on the command
line. But those tutorial examples should help a lot.
>
> Just let me know if you get stuck and need more help.
>
> One additional consideration is the accumulation interval. Since
you're comparing precipitation, you'll need to make sure the
accumulation intervals match up between the two. After you've put
your datasets onto a common grid, you may need to run the MET
pcp_combine tool to get them into a common accumulation interval (e.g.
comparing 24-hour model precip to the 24 hours of the StageIV
analysis).
>
> Thanks,
> John
>
>
> On 03/24/2014 10:56 AM, Tardif, Elliot M via RT wrote:
>>
>> Mon Mar 24 10:56:39 2014: Request 65954 was acted upon.
>> Transaction: Ticket created by elliot.tardif at ncdenr.gov
>> Queue: met_help
>> Subject: Precip/MODE verification issues
>> Owner: Nobody
>> Requestors: elliot.tardif at ncdenr.gov
>> Status: new
>> Ticket <URL:
https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=65954
>>>
>>
>>
>> Good morning,
>>
>> I am attempting to use MODE to verify some WRF model output via
UPPV2.0 to gridded observed precipitation data (see link here for the
observed precip dataset I am using:
http://data.eol.ucar.edu/codiac/dss/id=21.093). The two data sets are
not of the same projection, spatial resolution or domain size (please
see error below), and I would like to seek your help on how to get
these two datasets to have the same properties such that MODE can be
utilized in verifying the WRF data upon this observed data. I have
reviewed the met_help archives and did not find a similar case as
this. Also, please note that I attempted to ftp some data and
observed files to go with this email, but the ftp did not work. I
will be happy to hear whatever advice you may be able to offer, and I
will be happy to send along any additional information or files you
need to help me solve this issue.
>>
>> *** Running MODE on APCP using a GRIB forecast and netCDF
observation
>> *** DEBUG 1: Default Config File:
>> /opt/storage/high-
speed/EMT2/METv4.1/METv4.1/data/config/MODEConfig_de
>> fault DEBUG 1: Match Config File:
>> /opt/storage/high-
speed/EMT2/METv4.1/METv4.1/data/config/MODEConfig_de
>> fault DEBUG 1: Merge Config File:
>> /opt/storage/high-
speed/EMT2/METv4.1/METv4.1/data/config/MODEConfig_de
>> fault DEBUG 1: Forecast File:
>> /opt/storage/high-
speed/EMT2/UPPVspace/postprd/old_WRF/2011026/WRFPRS_
>> d01.24 DEBUG 1: Observation File:
>> /opt/storage/high-speed/EMT2/2011MetData/precip/ST4.2011012612.24h
>> ERROR :
>> ERROR : process_fcst_obs_files() -> The forecast and observation
>> grids do not match: Projection: Lambert Conformal Nx: 471 Ny: 311
Lat_LL: 20.857 Lon_LL: 121.492 Lon_orient: 97.000 Alpha: 1037.975
Cone: 0.630 Bx: 218.5427 By: 791.1670 != Projection: Stereographic Nx:
1121 Ny: 881 IsNorthHemisphere: true Lon_orient: 105.000 Bx: 399.440
By: 1599.329 Alpha: 2496.0783 ERROR :
>>
>> Thank you for your time,
>>
>> Elliot Tardif, Meteorologist II
>> NC DENR, Division of Air Quality
>> Planning Section, Attainment Planning Branch
>> 1641 Mail Service Center
>> Raleigh, NC 27699-1641
>> Phone/Fax: 919-707-8483
>> Email: Elliot.Tardif at ncdenr.gov<mailto:Nick.Witcraft at ncdenr.gov>
>> Web : http://www.ncair.org<http://www.ncair.org/>
>>
>> Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third
parties unless the content is exempt by statue or other regulation.
>>
>
>
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