[Met_help] [rt.rap.ucar.edu #85596] History for plotting CEILING in METViewer

[John Halley Gotway via RT]

----------------------------------------------------------------
  Initial Request
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Hi there,

I have a question regarding plotting ceiling in METViewer.  It may
necessitate a change to MET.

I am trying to compare ceiling in VSDB to ceiling in MET.  The problem is
that in MET, I have output lines that have the following in it:

HGT       L0       CEILING   L0      ADPSFC G236
HGT       L0       HOCB      L0      ADPSFC G236

This has the first variable being labelled HGT (as in the model) and the
2nd variable being labelled either CEILING or HOCB (cloud base height, both
of these as in the observation).

But it seems to me that METViewer can only see the variable HGT, and not
either the CEILING or HOCB in it, so I can differentiate between the two.
Is there something I need to do, in either MET or METviewer, so I can plot
ceiling only and not all HGTs at level L0?

Thanks!

Perry


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  Complete Ticket History
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Subject: plotting CEILING in METViewer
From: John Halley Gotway
Time: Tue Jun 19 14:21:55 2018

Hi Perry,

Great question.  I'm actually surprised that this hasn't come up
sooner.
The problem is that we're comparing the same FCST_VAR string (HGT) to
two
different OBS_VAR strings (CEILING and HOCB).  And METViewer doesn't
give
you a way of differentiating between those two OBS_VAR strings.

Tatiana and I took some time to brainstorm solutions and settled on a
pretty simple one that should allow for this.  In the "Y1 Series
Variables"
and "Fixed Values" sections of the METViewer GUI, you can select from
dropdown lists of MET header columns which include MODEL and DESC, for
example.  The solution is simply adding OBS_VAR to that list of
fields.
That should enable you to differentiate between these cases.

We had a couple other potential ideas, but think this is the easy one
we
should try first.

By the way, you can kind of do this yourself with the existing code.
When
you run Point-Stat, you could set up the "desc" entry separately for
each
verification task.  For example, you could set it as:
   desc = "HGT_vs_CEILING"; // for the first comparison
   desc = "HGT_vs_HOCB"; // for the second comparison

But that'd require you to rerun Point-Stat and reload METViewer.
That's
the band-aid we'd recommend until Tatiana adds OBS_VAR to the list of
fields in the next release of METViewer.

How does this approach sound to you?

Thanks,
John

On Tue, Jun 19, 2018 at 9:36 AM perry.shafran at noaa.gov via RT <
met_help at ucar.edu> wrote:

>
> Tue Jun 19 09:35:42 2018: Request 85596 was acted upon.
> Transaction: Ticket created by perry.shafran at noaa.gov
>        Queue: met_help
>      Subject: plotting CEILING in METViewer
>        Owner: Nobody
>   Requestors: perry.shafran at noaa.gov
>       Status: new
>  Ticket <URL:
https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=85596 >
>
>
> Hi there,
>
> I have a question regarding plotting ceiling in METViewer.  It may
> necessitate a change to MET.
>
> I am trying to compare ceiling in VSDB to ceiling in MET.  The
problem is
> that in MET, I have output lines that have the following in it:
>
> HGT       L0       CEILING   L0      ADPSFC G236
> HGT       L0       HOCB      L0      ADPSFC G236
>
> This has the first variable being labelled HGT (as in the model) and
the
> 2nd variable being labelled either CEILING or HOCB (cloud base
height, both
> of these as in the observation).
>
> But it seems to me that METViewer can only see the variable HGT, and
not
> either the CEILING or HOCB in it, so I can differentiate between the
two.
> Is there something I need to do, in either MET or METviewer, so I
can plot
> ceiling only and not all HGTs at level L0?
>
> Thanks!
>
> Perry
>
>

------------------------------------------------
Subject: plotting CEILING in METViewer
From: perry.shafran at noaa.gov
Time: Tue Jun 19 14:26:11 2018

I don't think I'd go back and re-run MET, but I might put in this
patch
going forward.  I automatically run MET every day and I can try this
and
then load new data and then test until you put the new fix in there.

Thanks!

Perry

On Tue, Jun 19, 2018 at 4:21 PM, John Halley Gotway via RT <
met_help at ucar.edu> wrote:

> Hi Perry,
>
> Great question.  I'm actually surprised that this hasn't come up
sooner.
> The problem is that we're comparing the same FCST_VAR string (HGT)
to two
> different OBS_VAR strings (CEILING and HOCB).  And METViewer doesn't
give
> you a way of differentiating between those two OBS_VAR strings.
>
> Tatiana and I took some time to brainstorm solutions and settled on
a
> pretty simple one that should allow for this.  In the "Y1 Series
Variables"
> and "Fixed Values" sections of the METViewer GUI, you can select
from
> dropdown lists of MET header columns which include MODEL and DESC,
for
> example.  The solution is simply adding OBS_VAR to that list of
fields.
> That should enable you to differentiate between these cases.
>
> We had a couple other potential ideas, but think this is the easy
one we
> should try first.
>
> By the way, you can kind of do this yourself with the existing code.
When
> you run Point-Stat, you could set up the "desc" entry separately for
each
> verification task.  For example, you could set it as:
>    desc = "HGT_vs_CEILING"; // for the first comparison
>    desc = "HGT_vs_HOCB"; // for the second comparison
>
> But that'd require you to rerun Point-Stat and reload METViewer.
That's
> the band-aid we'd recommend until Tatiana adds OBS_VAR to the list
of
> fields in the next release of METViewer.
>
> How does this approach sound to you?
>
> Thanks,
> John
>
> On Tue, Jun 19, 2018 at 9:36 AM perry.shafran at noaa.gov via RT <
> met_help at ucar.edu> wrote:
>
> >
> > Tue Jun 19 09:35:42 2018: Request 85596 was acted upon.
> > Transaction: Ticket created by perry.shafran at noaa.gov
> >        Queue: met_help
> >      Subject: plotting CEILING in METViewer
> >        Owner: Nobody
> >   Requestors: perry.shafran at noaa.gov
> >       Status: new
> >  Ticket <URL:
https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=85596 >
> >
> >
> > Hi there,
> >
> > I have a question regarding plotting ceiling in METViewer.  It may
> > necessitate a change to MET.
> >
> > I am trying to compare ceiling in VSDB to ceiling in MET.  The
problem is
> > that in MET, I have output lines that have the following in it:
> >
> > HGT       L0       CEILING   L0      ADPSFC G236
> > HGT       L0       HOCB      L0      ADPSFC G236
> >
> > This has the first variable being labelled HGT (as in the model)
and the
> > 2nd variable being labelled either CEILING or HOCB (cloud base
height,
> both
> > of these as in the observation).
> >
> > But it seems to me that METViewer can only see the variable HGT,
and not
> > either the CEILING or HOCB in it, so I can differentiate between
the two.
> > Is there something I need to do, in either MET or METviewer, so I
can
> plot
> > ceiling only and not all HGTs at level L0?
> >
> > Thanks!
> >
> > Perry
> >
> >
>
>

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