[Met_help] [rt.rap.ucar.edu #63379] History for Use of Probability data in Mode

[John Halley Gotway via RT]

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  Initial Request
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John, I have been setting up MODE to verify precipitation probabilities.  I am comparing the probability of precip of .25" in 6hrs to stage IV 6 hr precip amounts.   In the mode config file, I have to set the model value field name.  What should I use in this case?  Leave it blank?

Thanks

Bob Craig



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  Complete Ticket History
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Subject: Use of Probability data in Mode
From: John Halley Gotway
Time: Mon Oct 14 11:28:21 2013

Bob,

Interesting, when I run the GRIB file you sent through wgrib, I get:

    Undefined parameter table (center 57-4 table 3), using NCEP-opn
    1:0:d=13100300:UVI:kpds5=206:kpds6=1:kpds7=0:TR=4:P1=0:P2=6:TimeU=1:sfc:0-
6hr acc:NAve=0

I guess we don't have the same parameter tables defined.  MET thinks
it's UVI for GRIB code 206, which is for "Ultra Violet Index".  I ran
the following command, and am attaching the resulting image:

    METv4.1/bin/plot_data_plane model_pcp model_pcp.ps 'name="UVI";
level="A6";'
    DEBUG 1: Opening data file: model_pcp
    DEBUG 1: Creating postscript file: model_pcp.ps

However, it'd be preferable to tell MET how to interpret this
combination of GRIB1 parameter table version number and code.  Try
editing this file: METv4.1/data/table_files/nceptab_flat.txt

Add in the following line:
    206 3 "PQP6" "Probability of 6-hour precipitation" "%"

Then you can run plot_data_plane like this:
    METv4.1/bin/plot_data_plane model_pcp model_pcp.ps 'name="PQP6";
level="A6"; GRIB1_ptv=3;'

Notice that I had to tell it to use parameter table version number 3
(GRIB1_ptv=3) since it differs from the default value of 2.

In MODE, you'll just set these same elements in the "field" section of
the config file:
    field = {
       name      = "PQP6";
       level     = "A06";
       GRIB1_ptv = 3;
    };

Just let me know if you get stuck.

Thanks,
John Halley Gotway


On 10/11/2013 12:06 PM, Craig, Robert J Civ USAF AFWA 16 WS/WXN via RT
wrote:
>
> Fri Oct 11 12:06:08 2013: Request 63379 was acted upon.
> Transaction: Ticket created by Robert.Craig at offutt.af.mil
>         Queue: met_help
>       Subject: Use of Probability data in Mode
>         Owner: Nobody
>    Requestors: Robert.Craig at offutt.af.mil
>        Status: new
>   Ticket <URL:
https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=63379 >
>
>
> John, I have been setting up MODE to verify precipitation
probabilities.  I am comparing the probability of precip of .25" in
6hrs to stage IV 6 hr precip amounts.   In the mode config file, I
have to set the model value field name.  What should I use in this
case?  Leave it blank?
>
> Thanks
>
> Bob Craig
>

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