[gradsusr] Simple query: Accumulated Rain??

[Joey Woodson]

The control file you are opening only contains one GRIB file. You need to
make a control file that contains multiple GRIB files (which might be
called wrsprs_d01_00.grib2, wrsprs_d01_03.grib2, etc) so that you can
access the prior times.

Joey
InstantWeatherMaps.com

On Wed, Sep 9, 2015 at 4:54 PM, giacomo tricarico <mino-98 at hotmail.it>
wrote:

> OK! So I'm using this example code:
>
> 'open wrfprs_d01_${fhr}.ctl  ##IN THIS EXAMPLE I'VE USED wrsprs_d01_12.ctl
> 'set display color white'
> 'set gxout shaded'
> 'color 1 100 1 -kind white->red   ##USES A SCRIPT THAT MAKES A NEW RAINBOW
> SACLE
> 'd APCPsfc(t-3)+APCPsfc'
>
> But I receive this error:
> Notice:  Automatic Grid Interpolation Taking Place
> Data Request Warning:  Request is completely outside file limits
>   Entire grid contents are set to missing data
>   Grid limits of file:     X = 1 93  Y = 1 87  Z = 1 26  T = 1 1  E = 1 1
>   Grid limits of request:  X = 1 93  Y = 1 87  Z = 1 1  T = -2 -2  E = 1 1
>   Warning issued for variable = apcpsfc
> Cannot contour grid - all undefined values
>
>
> Please help me, it's very important for my website!
>
> Cheers,
> Giacomo
> ------------------------------
> Date: Wed, 9 Sep 2015 16:13:14 -0500
>
> From: instantweathermaps at gmail.com
> To: gradsusr at gradsusr.org
> Subject: Re: [gradsusr] Simple query: Accumulated Rain??
>
> If the WRF output is 3hr-accumulated, then use sum. If it's
> total-accumulated, use subtraction.
>
> Joey Woodson
> InstantWeatherMaps.com
>
> On Wed, Sep 9, 2015 at 3:11 PM, giacomo tricarico <mino-98 at hotmail.it>
> wrote:
>
> In my specific case, which code should I use?
> Thanks Joey!!
>
> ------------------------------
> Date: Wed, 9 Sep 2015 14:49:07 -0500
> From: instantweathermaps at gmail.com
> To: gradsusr at gradsusr.org
> Subject: Re: [gradsusr] Simple query: Accumulated Rain??
>
>
> You can use the sum function in GrADS to calculate x-hr accumulated rain
> from n-hr accumulated rain, where x>n. If x<n, you can use subtraction, as
> in ACPCsfc(t-4)-ACPCsfc.
>
> On Wed, Sep 9, 2015 at 7:19 AM, giacomo tricarico <mino-98 at hotmail.it>
> wrote:
>
> Hi, my WRF plots 17 files, from 00h to 48h, with 3h steps; so rain is
> accumulated each 3 hours.
>
> BUT how could I have 12h and 24h accumulated rain with grads? So that I
> have respectively 4 and 2 images :)
>
> Thanks,
> Giacomo
>
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