[Met_help] [rt.rap.ucar.edu #78955] History for MET V5.2 regrid tool (UNCLASSIFIED)
John Halley Gotway via RT
met_help at ucar.edu
Thu Dec 15 09:13:47 MST 2016
----------------------------------------------------------------
Initial Request
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CLASSIFICATION: UNCLASSIFIED
When using the regrid tool on the fly with Series-Analysis or Grid-Stat and
I follow the convention of regridding the model grid to that of the gridded
observations, what happens when the observations are on a grid which covers
a much larger area than that of the forecast grid? Will the tool window out
the subset of the gridded observations needed to verify over the area of the
forecast domain?
Thanks.
R/
John
Mr John W. Raby, Meteorologist
U.S. Army Research Laboratory
White Sands Missile Range, NM 88002
(575) 678-2004 DSN 258-2004
FAX (575) 678-1230 DSN 258-1230
Email: john.w.raby2.civ at mail.mil
CLASSIFICATION: UNCLASSIFIED
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Complete Ticket History
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Subject: MET V5.2 regrid tool (UNCLASSIFIED)
From: John Halley Gotway
Time: Wed Dec 14 10:37:10 2016
John,
Yes, the regridded result will appear as a window a valid data
surrounded
by bad data values. By way of example, I grabbed a recent global GFS
file
and a NAM file covering CONUS for the same time. I treated the GFS as
the
forecast and the NAM as the observation and ran them through Grid-Stat
for
500mb temperature.
I plotted the resulting difference fields and have attached them. In
the
TO_GRID_FCST.png image, we've regridded the CONUS NAM data to the
global
GFS grid resulting in a window of valid data.
Hope that helps clarify.
Thanks,
John
On Tue, Dec 13, 2016 at 4:47 PM, Raby, John W USA CIV via RT <
met_help at ucar.edu> wrote:
>
> Tue Dec 13 16:47:54 2016: Request 78955 was acted upon.
> Transaction: Ticket created by john.w.raby2.civ at mail.mil
> Queue: met_help
> Subject: MET V5.2 regrid tool (UNCLASSIFIED)
> Owner: Nobody
> Requestors: john.w.raby2.civ at mail.mil
> Status: new
> Ticket <URL:
https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=78955 >
>
>
> CLASSIFICATION: UNCLASSIFIED
>
> When using the regrid tool on the fly with Series-Analysis or Grid-
Stat
> and
> I follow the convention of regridding the model grid to that of the
gridded
> observations, what happens when the observations are on a grid which
covers
> a much larger area than that of the forecast grid? Will the tool
window out
> the subset of the gridded observations needed to verify over the
area of
> the
> forecast domain?
>
> Thanks.
>
> R/
> John
>
> Mr John W. Raby, Meteorologist
> U.S. Army Research Laboratory
> White Sands Missile Range, NM 88002
> (575) 678-2004 DSN 258-2004
> FAX (575) 678-1230 DSN 258-1230
> Email: john.w.raby2.civ at mail.mil
>
>
>
> CLASSIFICATION: UNCLASSIFIED
>
>
------------------------------------------------
Subject: MET V5.2 regrid tool (UNCLASSIFIED)
From: Raby, John W USA CIV
Time: Wed Dec 14 12:06:27 2016
CLASSIFICATION: UNCLASSIFIED
John -
This is exactly what I was looking for. I like this flexibility in the
sw to
deal with such issues of domain size mismatches.
To clarify, for the image TO_GRID_OBS, the GLOBAL GFS was regraded to
match
the grid of the CONUS NAM. Is this correct? If so, then you must have
run
Grid-Stat with two different TO-GRID settings.
Thanks.
R/
John
-----Original Message-----
From: John Halley Gotway via RT [mailto:met_help at ucar.edu]
Sent: Wednesday, December 14, 2016 10:37 AM
To: Raby, John W CIV USARMY RDECOM ARL (US)
<john.w.raby2.civ at mail.mil>
Subject: [Non-DoD Source] Re: [rt.rap.ucar.edu #78955] MET V5.2 regrid
tool
(UNCLASSIFIED)
All active links contained in this email were disabled. Please verify
the
identity of the sender, and confirm the authenticity of all links
contained
within the message prior to copying and pasting the address to a Web
browser.
----
John,
Yes, the regridded result will appear as a window a valid data
surrounded by
bad data values. By way of example, I grabbed a recent global GFS
file and a
NAM file covering CONUS for the same time. I treated the GFS as the
forecast
and the NAM as the observation and ran them through Grid-Stat for
500mb
temperature.
I plotted the resulting difference fields and have attached them. In
the
TO_GRID_FCST.png image, we've regridded the CONUS NAM data to the
global GFS
grid resulting in a window of valid data.
Hope that helps clarify.
Thanks,
John
On Tue, Dec 13, 2016 at 4:47 PM, Raby, John W USA CIV via RT <
met_help at ucar.edu> wrote:
>
> Tue Dec 13 16:47:54 2016: Request 78955 was acted upon.
> Transaction: Ticket created by john.w.raby2.civ at mail.mil
> Queue: met_help
> Subject: MET V5.2 regrid tool (UNCLASSIFIED)
> Owner: Nobody
> Requestors: john.w.raby2.civ at mail.mil
> Status: new
> Ticket <Caution-url:
> Caution-https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=78955 >
>
>
> CLASSIFICATION: UNCLASSIFIED
>
> When using the regrid tool on the fly with Series-Analysis or
> Grid-Stat and I follow the convention of regridding the model grid
to
> that of the gridded observations, what happens when the observations
> are on a grid which covers a much larger area than that of the
> forecast grid? Will the tool window out the subset of the gridded
> observations needed to verify over the area of the forecast domain?
>
> Thanks.
>
> R/
> John
>
> Mr John W. Raby, Meteorologist
> U.S. Army Research Laboratory
> White Sands Missile Range, NM 88002
> (575) 678-2004 DSN 258-2004
> FAX (575) 678-1230 DSN 258-1230
> Email: john.w.raby2.civ at mail.mil
>
>
>
> CLASSIFICATION: UNCLASSIFIED
>
>
CLASSIFICATION: UNCLASSIFIED
------------------------------------------------
Subject: MET V5.2 regrid tool (UNCLASSIFIED)
From: John Halley Gotway
Time: Wed Dec 14 12:49:26 2016
Yes, that's exactly right. I ran Grid-Stat twice. Here are the steps
I
ran:
(1) Use wget to grab some recent data:
wget
ftp://ftp.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2016121400/gfs.t00z.pgrb2.0p25.f000
wget
ftp://ftp.ncep.noaa.gov/pub/data/nccf/com/nam/prod/nam.20161214/nam.t00z.conusnest.hiresf00.tm00.grib2
(2) Set up attached GridStatConfig file.
(3) Run the shell script listed below to run Grid-Stat, call
Plot-Data-Plane to plot the resulting difference field, and call
convert to
reformat from PostScript to PNG.
#!/bin/sh
for case in `echo "FCST OBS"`; do
export TO_GRID=${case}
/usr/local/met-5.2/bin/grid_stat gfs.t00z.pgrb2.0p25.f000
nam.t00z.conusnest.hiresf00.tm00.grib2 GridStatConfig
/usr/local/met-5.2/bin/plot_data_plane *TO_GRID_${case}*_pairs.nc
TO_GRID_${case}.ps 'name="DIFF_TMP_P500_TMP_P500_FULL";
level="(*,*)";'
convert -rotate 90 -background white -flatten TO_GRID_${case}.ps
TO_GRID_${case}.png
done
On Wed, Dec 14, 2016 at 12:06 PM, Raby, John W USA CIV via RT <
met_help at ucar.edu> wrote:
>
> <URL: https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=78955 >
>
> CLASSIFICATION: UNCLASSIFIED
>
> John -
>
> This is exactly what I was looking for. I like this flexibility in
the sw
> to
> deal with such issues of domain size mismatches.
>
> To clarify, for the image TO_GRID_OBS, the GLOBAL GFS was regraded
to match
> the grid of the CONUS NAM. Is this correct? If so, then you must
have run
> Grid-Stat with two different TO-GRID settings.
>
> Thanks.
>
> R/
> John
>
> -----Original Message-----
> From: John Halley Gotway via RT [mailto:met_help at ucar.edu]
> Sent: Wednesday, December 14, 2016 10:37 AM
> To: Raby, John W CIV USARMY RDECOM ARL (US)
<john.w.raby2.civ at mail.mil>
> Subject: [Non-DoD Source] Re: [rt.rap.ucar.edu #78955] MET V5.2
regrid
> tool
> (UNCLASSIFIED)
>
> All active links contained in this email were disabled. Please
verify the
> identity of the sender, and confirm the authenticity of all links
contained
> within the message prior to copying and pasting the address to a Web
> browser.
>
>
>
>
> ----
>
> John,
>
> Yes, the regridded result will appear as a window a valid data
surrounded
> by
> bad data values. By way of example, I grabbed a recent global GFS
file
> and a
> NAM file covering CONUS for the same time. I treated the GFS as the
> forecast
> and the NAM as the observation and ran them through Grid-Stat for
500mb
> temperature.
>
> I plotted the resulting difference fields and have attached them.
In the
> TO_GRID_FCST.png image, we've regridded the CONUS NAM data to the
global
> GFS
> grid resulting in a window of valid data.
>
> Hope that helps clarify.
>
> Thanks,
> John
>
>
>
> On Tue, Dec 13, 2016 at 4:47 PM, Raby, John W USA CIV via RT <
> met_help at ucar.edu> wrote:
>
> >
> > Tue Dec 13 16:47:54 2016: Request 78955 was acted upon.
> > Transaction: Ticket created by john.w.raby2.civ at mail.mil
> > Queue: met_help
> > Subject: MET V5.2 regrid tool (UNCLASSIFIED)
> > Owner: Nobody
> > Requestors: john.w.raby2.civ at mail.mil
> > Status: new
> > Ticket <Caution-url:
> > Caution-https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=78955 >
> >
> >
> > CLASSIFICATION: UNCLASSIFIED
> >
> > When using the regrid tool on the fly with Series-Analysis or
> > Grid-Stat and I follow the convention of regridding the model grid
to
> > that of the gridded observations, what happens when the
observations
> > are on a grid which covers a much larger area than that of the
> > forecast grid? Will the tool window out the subset of the gridded
> > observations needed to verify over the area of the forecast
domain?
> >
> > Thanks.
> >
> > R/
> > John
> >
> > Mr John W. Raby, Meteorologist
> > U.S. Army Research Laboratory
> > White Sands Missile Range, NM 88002
> > (575) 678-2004 DSN 258-2004
> > FAX (575) 678-1230 DSN 258-1230
> > Email: john.w.raby2.civ at mail.mil
> >
> >
> >
> > CLASSIFICATION: UNCLASSIFIED
> >
> >
>
>
> CLASSIFICATION: UNCLASSIFIED
>
>
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