[gradsusr] GEM Precipitation issue

[Joey Woodson]

You can use APCPsfc-APCPsfc(t-1) to get the 3-hour precipitation. Note that
you need to have downloaded the ACPCsfc GRIB file for the previous forecast
hour as well in order to do this. You also need to generate a .ctl file
that encompasses both GRIB files (personally I like to have it include all
of the relevant files).

On Sat, Dec 12, 2015 at 8:53 AM, Chorley Weather <
weatherstu at chorleyweather.com> wrote:

> Hi all,
>
>
>
> I am currently developing GEM charts (25km) and I see that function
> variable APCPsfc is actually accumulated precipitation. Is there a way to
> get single 3 hour precipitation rates without the accumulation. There is
> also a PRATE option but this seem to be full of undefined values.
>
> Thank you in advance,
> --
>
> Stuart Markham
>
>
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