[Met_help] [rt.rap.ucar.edu #87692] History for Combine GFS fields for precip

Fri Nov 9 09:33:20 MST 2018

----------------------------------------------------------------
  Initial Request
----------------------------------------------------------------

Hi,

How does MET PCP_combine routine work if I want to use it for accumulation
of precipitation for GFS files over 24,72 or 120h period. For example, take
any day data from
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/ and
if I have files : gfs.t00z.pgrb2.0p25.f006
<https://mail.google.com/mail/u/0/gfs.t00z.pgrb2.0p25.f006>,
gfs.t00z.pgrb2.0p25.f012,
<https://mail.google.com/mail/u/0/gfs.t00z.pgrb2.0p25.f006>gfs.t00z.pgrb2.0p25.f018
and  <https://mail.google.com/mail/u/0/gfs.t00z.pgrb2.0p25.f006>
gfs.t00z.pgrb2.0p25.f024 and each of them has 6hour average precipitation.
How do I make 1day accumulated precipitation using pcp_combine, do I have
to explicitly mention all the four the input files in config file ? Also,
same for 5day average, do I have to mention all 20 file names in config
file to get ncetcdf output ?

Thanks
Debasish

----------------------------------------------------------------
  Complete Ticket History
----------------------------------------------------------------

Subject: Combine GFS fields for precip
From: John Halley Gotway
Time: Wed Nov 07 11:38:28 2018

Hi Deb,

I see that you have a question about the pcp_combine tool and the
computation of accumulated precipitation.

The answer really depends on how precip is stored in your model
output.  In
general, I've seen precip stored in 3 different ways:

(1) Store it as a runtime accumulation... meaning the 6 hour forecast
contains precip from 0 to 6 hours, and 120 hour forecast contains
precip
from 0 to 120 hours.  In this case, you'll find the pcp_combine "-
subtract"
option to be very useful.

(2) Store it in a pre-defined bucket, perhaps a 6-hour bucket.  In
this
case, the 6-hour forecast would contain 0 to 6, but the 120 hour
forecast
would contain 114 to 120.  In this case, you'll find the pcp_combine
"-add"
and "-sum" options to be very useful.

(3) Store it in multiple accumulation intervals.  The 120-hour
forecast may
contain 6, 12, and 24-hour accumulations.

The logic of running pcp_combine really depends on how precip is
stored in
the model output.  So let's look at the GFS example you referenced:

*wget
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f120
<http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f120>
*
*wgrib2 gfs.t00z.pgrb2.0p25.f120 | grep APCP*

293:148405407:d=2018110600:APCP:surface:114-120 hour acc fcst:

Looks like GFS contain type (2) with a 6-hourly accumulation.  If
you're
interested in the 24-hour accumulation ending at 120 hours, you'd need
to
use the 120, 114, 108, and 102 hour forecasts to compute that.  To
demonstrate, I downloaded those 4 files:

*wget
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f120
<http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f120>
*

*wget
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f114
<http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f114>
*

*wget
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f108
<http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f108>
*

*wget
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f102
<http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f102>
*

And then here are examples of running pcp_combine to compute the 24-
hour
sums:

# Get the 06 hour precip from the files explicitly listed and add them
up

*met-8.0/bin/pcp_combine -add gfs.t00z.pgrb2.0p25.f102 06
gfs.t00z.pgrb2.0p25.f108 06 gfs.t00z.pgrb2.0p25.f114 06
gfs.t00z.pgrb2.0p25.f120 06 gfs_add.nc <http://gfs_add.nc>*

# Based on the specified timing info, search the current directory for
GRIB
files with the need precip accumulations and sum them up

*met-8.0/bin/pcp_combine -sum 2018110600 06 2018111100 24 gfs_sum.nc
<http://gfs_sum.nc> -pcpdir ./*

Both these commands result in the same output accumulation interval.

Hope this helps clarify.

FYI, I always prefer it when models write out runtime accumulations.
That
way, you only need 2 files... the beginning/ending of the time
interval.

Thanks,
John

On Wed, Nov 7, 2018 at 11:00 AM Debasish Hazra via RT
<met_help at ucar.edu>
wrote:

>
> Wed Nov 07 10:59:52 2018: Request 87692 was acted upon.
> Transaction: Ticket created by debasish.hazra5 at gmail.com
>        Queue: met_help
>      Subject: Combine GFS fields for precip
>        Owner: Nobody
>   Requestors: debasish.hazra5 at gmail.com
>       Status: new
>  Ticket <URL:
https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=87692 >
>
>
> Hi,
>
> How does MET PCP_combine routine work if I want to use it for
accumulation
> of precipitation for GFS files over 24,72 or 120h period. For
example, take
> any day data from
>
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/
and
> if I have files : gfs.t00z.pgrb2.0p25.f006
> <https://mail.google.com/mail/u/0/gfs.t00z.pgrb2.0p25.f006>,
> gfs.t00z.pgrb2.0p25.f012,
> <https://mail.google.com/mail/u/0/gfs.t00z.pgrb2.0p25.f006
> >gfs.t00z.pgrb2.0p25.f018
> and  <https://mail.google.com/mail/u/0/gfs.t00z.pgrb2.0p25.f006>
> gfs.t00z.pgrb2.0p25.f024 and each of them has 6hour average
precipitation.
> How do I make 1day accumulated precipitation using pcp_combine, do I
have
> to explicitly mention all the four the input files in config file ?
Also,
> same for 5day average, do I have to mention all 20 file names in
config
> file to get ncetcdf output ?
>
> Thanks
> Debasish
>
>

------------------------------------------------
Subject: Combine GFS fields for precip
From: Debasish Hazra
Time: Thu Nov 08 11:49:52 2018

Thanks John for detail answer. Based on your answer, I created two .sh
file
one for adding APCP for day 1 and another for 5 days.

#Day 1 : pcp_combine -add \
$WORKDIR/gfs.t00z.pgrb2.0p25.f006.grib2 06 \
$WORKDIR/gfs.t00z.pgrb2.0p25.f012.grib2 06 \
$WORKDIR/gfs.t00z.pgrb2.0p25.f018.grib2 06 \
$WORKDIR/gfs.t00z.pgrb2.0p25.f024.grib2 06 \
$OUTDIR/gfs_APCP_24_2018060200_F06_F24.nc \
-v 5
and
#Day 5 :
pcp_combine -add \
$WORKDIR/gfs.t00z.pgrb2.0p25.f006.grib2 06 \
$WORKDIR/gfs.t00z.pgrb2.0p25.f012.grib2 06 \
$WORKDIR/gfs.t00z.pgrb2.0p25.f018.grib2 06 \
$WORKDIR/gfs.t00z.pgrb2.0p25.f024.grib2 06 \
$WORKDIR/gfs.t00z.pgrb2.0p25.f030.grib2 06 \
$WORKDIR/gfs.t00z.pgrb2.0p25.f036.grib2 06 \
$WORKDIR/gfs.t00z.pgrb2.0p25.f042.grib2 06 \
$WORKDIR/gfs.t00z.pgrb2.0p25.f048.grib2 06 \
$WORKDIR/gfs.t00z.pgrb2.0p25.f054.grib2 06 \
$WORKDIR/gfs.t00z.pgrb2.0p25.f060.grib2 06 \
$WORKDIR/gfs.t00z.pgrb2.0p25.f066.grib2 06 \
$WORKDIR/gfs.t00z.pgrb2.0p25.f072.grib2 06 \
$WORKDIR/gfs.t00z.pgrb2.0p25.f078.grib2 06 \
$WORKDIR/gfs.t00z.pgrb2.0p25.f084.grib2 06 \
$WORKDIR/gfs.t00z.pgrb2.0p25.f090.grib2 06 \
$WORKDIR/gfs.t00z.pgrb2.0p25.f096.grib2 06 \
$WORKDIR/gfs.t00z.pgrb2.0p25.f102.grib2 06 \
$WORKDIR/gfs.t00z.pgrb2.0p25.f108.grib2 06 \
$WORKDIR/gfs.t00z.pgrb2.0p25.f114.grib2 06 \
$WORKDIR/gfs.t00z.pgrb2.0p25.f120.grib2 06 \
$OUTDIR/gfs_APCP_120_2018060200_F06_F120.nc \

Running them and using ncl_filedump I found total precipitation for 1
day
and 5 day, one combining 4 files and other combining 20 files. I hope
I am
doing it right.

Thanks
Debasish

On Wed, Nov 7, 2018 at 1:38 PM John Halley Gotway via RT
<met_help at ucar.edu>
wrote:

> Hi Deb,
>
> I see that you have a question about the pcp_combine tool and the
> computation of accumulated precipitation.
>
> The answer really depends on how precip is stored in your model
output.  In
> general, I've seen precip stored in 3 different ways:
>
> (1) Store it as a runtime accumulation... meaning the 6 hour
forecast
> contains precip from 0 to 6 hours, and 120 hour forecast contains
precip
> from 0 to 120 hours.  In this case, you'll find the pcp_combine "-
subtract"
> option to be very useful.
>
> (2) Store it in a pre-defined bucket, perhaps a 6-hour bucket.  In
this
> case, the 6-hour forecast would contain 0 to 6, but the 120 hour
forecast
> would contain 114 to 120.  In this case, you'll find the pcp_combine
"-add"
> and "-sum" options to be very useful.
>
> (3) Store it in multiple accumulation intervals.  The 120-hour
forecast may
> contain 6, 12, and 24-hour accumulations.
>
> The logic of running pcp_combine really depends on how precip is
stored in
> the model output.  So let's look at the GFS example you referenced:
>
> *wget
>
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f120
> <
>
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f120
> >
> *
> *wgrib2 gfs.t00z.pgrb2.0p25.f120 | grep APCP*
>
> 293:148405407:d=2018110600:APCP:surface:114-120 hour acc fcst:
>
>
> Looks like GFS contain type (2) with a 6-hourly accumulation.  If
you're
> interested in the 24-hour accumulation ending at 120 hours, you'd
need to
> use the 120, 114, 108, and 102 hour forecasts to compute that.  To
> demonstrate, I downloaded those 4 files:
>
>
> *wget
>
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f120
> <
>
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f120
> >
> *
>
> *wget
>
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f114
> <
>
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f114
> >
> *
>
> *wget
>
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f108
> <
>
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f108
> >
> *
>
> *wget
>
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f102
> <
>
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f102
> >
> *
>
>
> And then here are examples of running pcp_combine to compute the 24-
hour
> sums:
>
>
> # Get the 06 hour precip from the files explicitly listed and add
them up
>
>
> *met-8.0/bin/pcp_combine -add gfs.t00z.pgrb2.0p25.f102 06
> gfs.t00z.pgrb2.0p25.f108 06 gfs.t00z.pgrb2.0p25.f114 06
> gfs.t00z.pgrb2.0p25.f120 06 gfs_add.nc <http://gfs_add.nc>*
>
>
>
> # Based on the specified timing info, search the current directory
for GRIB
> files with the need precip accumulations and sum them up
>
>
>
> *met-8.0/bin/pcp_combine -sum 2018110600 06 2018111100 24 gfs_sum.nc
> <http://gfs_sum.nc> -pcpdir ./*
>
>
> Both these commands result in the same output accumulation interval.
>
>
> Hope this helps clarify.
>
>
> FYI, I always prefer it when models write out runtime accumulations.
That
> way, you only need 2 files... the beginning/ending of the time
interval.
>
>
> Thanks,
> John
>
> On Wed, Nov 7, 2018 at 11:00 AM Debasish Hazra via RT
<met_help at ucar.edu>
> wrote:
>
> >
> > Wed Nov 07 10:59:52 2018: Request 87692 was acted upon.
> > Transaction: Ticket created by debasish.hazra5 at gmail.com
> >        Queue: met_help
> >      Subject: Combine GFS fields for precip
> >        Owner: Nobody
> >   Requestors: debasish.hazra5 at gmail.com
> >       Status: new
> >  Ticket <URL:
https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=87692 >
> >
> >
> > Hi,
> >
> > How does MET PCP_combine routine work if I want to use it for
> accumulation
> > of precipitation for GFS files over 24,72 or 120h period. For
example,
> take
> > any day data from
> >
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/
> and
> > if I have files : gfs.t00z.pgrb2.0p25.f006
> > <https://mail.google.com/mail/u/0/gfs.t00z.pgrb2.0p25.f006>,
> > gfs.t00z.pgrb2.0p25.f012,
> > <https://mail.google.com/mail/u/0/gfs.t00z.pgrb2.0p25.f006
> > >gfs.t00z.pgrb2.0p25.f018
> > and  <https://mail.google.com/mail/u/0/gfs.t00z.pgrb2.0p25.f006>
> > gfs.t00z.pgrb2.0p25.f024 and each of them has 6hour average
> precipitation.
> > How do I make 1day accumulated precipitation using pcp_combine, do
I have
> > to explicitly mention all the four the input files in config file
? Also,
> > same for 5day average, do I have to mention all 20 file names in
config
> > file to get ncetcdf output ?
> >
> > Thanks
> > Debasish
> >
> >
>
>

------------------------------------------------
Subject: Combine GFS fields for precip
From: Debasish Hazra
Time: Thu Nov 08 12:01:08 2018

One more thing to know, pcp_combine by default sum or adds APCP from
gfs
files. How do I specify APCP for convective precipitation to get a
similar
combination of day 1 or 5 day total precipitation ?

Thanks
Debasish

On Thu, Nov 8, 2018 at 1:49 PM Debasish Hazra
<debasish.hazra5 at gmail.com>
wrote:

> Thanks John for detail answer. Based on your answer, I created two
.sh
> file one for adding APCP for day 1 and another for 5 days.
>
> #Day 1 : pcp_combine -add \
> $WORKDIR/gfs.t00z.pgrb2.0p25.f006.grib2 06 \
> $WORKDIR/gfs.t00z.pgrb2.0p25.f012.grib2 06 \
> $WORKDIR/gfs.t00z.pgrb2.0p25.f018.grib2 06 \
> $WORKDIR/gfs.t00z.pgrb2.0p25.f024.grib2 06 \
> $OUTDIR/gfs_APCP_24_2018060200_F06_F24.nc \
> -v 5
> and
> #Day 5 :
> pcp_combine -add \
> $WORKDIR/gfs.t00z.pgrb2.0p25.f006.grib2 06 \
> $WORKDIR/gfs.t00z.pgrb2.0p25.f012.grib2 06 \
> $WORKDIR/gfs.t00z.pgrb2.0p25.f018.grib2 06 \
> $WORKDIR/gfs.t00z.pgrb2.0p25.f024.grib2 06 \
> $WORKDIR/gfs.t00z.pgrb2.0p25.f030.grib2 06 \
> $WORKDIR/gfs.t00z.pgrb2.0p25.f036.grib2 06 \
> $WORKDIR/gfs.t00z.pgrb2.0p25.f042.grib2 06 \
> $WORKDIR/gfs.t00z.pgrb2.0p25.f048.grib2 06 \
> $WORKDIR/gfs.t00z.pgrb2.0p25.f054.grib2 06 \
> $WORKDIR/gfs.t00z.pgrb2.0p25.f060.grib2 06 \
> $WORKDIR/gfs.t00z.pgrb2.0p25.f066.grib2 06 \
> $WORKDIR/gfs.t00z.pgrb2.0p25.f072.grib2 06 \
> $WORKDIR/gfs.t00z.pgrb2.0p25.f078.grib2 06 \
> $WORKDIR/gfs.t00z.pgrb2.0p25.f084.grib2 06 \
> $WORKDIR/gfs.t00z.pgrb2.0p25.f090.grib2 06 \
> $WORKDIR/gfs.t00z.pgrb2.0p25.f096.grib2 06 \
> $WORKDIR/gfs.t00z.pgrb2.0p25.f102.grib2 06 \
> $WORKDIR/gfs.t00z.pgrb2.0p25.f108.grib2 06 \
> $WORKDIR/gfs.t00z.pgrb2.0p25.f114.grib2 06 \
> $WORKDIR/gfs.t00z.pgrb2.0p25.f120.grib2 06 \
> $OUTDIR/gfs_APCP_120_2018060200_F06_F120.nc \
>
> Running them and using ncl_filedump I found total precipitation for
1 day
> and 5 day, one combining 4 files and other combining 20 files. I
hope I am
> doing it right.
>
> Thanks
> Debasish
>
> On Wed, Nov 7, 2018 at 1:38 PM John Halley Gotway via RT <
> met_help at ucar.edu> wrote:
>
>> Hi Deb,
>>
>> I see that you have a question about the pcp_combine tool and the
>> computation of accumulated precipitation.
>>
>> The answer really depends on how precip is stored in your model
output.
>> In
>> general, I've seen precip stored in 3 different ways:
>>
>> (1) Store it as a runtime accumulation... meaning the 6 hour
forecast
>> contains precip from 0 to 6 hours, and 120 hour forecast contains
precip
>> from 0 to 120 hours.  In this case, you'll find the pcp_combine
>> "-subtract"
>> option to be very useful.
>>
>> (2) Store it in a pre-defined bucket, perhaps a 6-hour bucket.  In
this
>> case, the 6-hour forecast would contain 0 to 6, but the 120 hour
forecast
>> would contain 114 to 120.  In this case, you'll find the
pcp_combine
>> "-add"
>> and "-sum" options to be very useful.
>>
>> (3) Store it in multiple accumulation intervals.  The 120-hour
forecast
>> may
>> contain 6, 12, and 24-hour accumulations.
>>
>> The logic of running pcp_combine really depends on how precip is
stored in
>> the model output.  So let's look at the GFS example you referenced:
>>
>> *wget
>>
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f120
>> <
>>
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f120
>> >
>> *
>> *wgrib2 gfs.t00z.pgrb2.0p25.f120 | grep APCP*
>>
>> 293:148405407:d=2018110600:APCP:surface:114-120 hour acc fcst:
>>
>>
>> Looks like GFS contain type (2) with a 6-hourly accumulation.  If
you're
>> interested in the 24-hour accumulation ending at 120 hours, you'd
need to
>> use the 120, 114, 108, and 102 hour forecasts to compute that.  To
>> demonstrate, I downloaded those 4 files:
>>
>>
>> *wget
>>
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f120
>> <
>>
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f120
>> >
>> *
>>
>> *wget
>>
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f114
>> <
>>
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f114
>> >
>> *
>>
>> *wget
>>
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f108
>> <
>>
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f108
>> >
>> *
>>
>> *wget
>>
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f102
>> <
>>
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f102
>> >
>> *
>>
>>
>> And then here are examples of running pcp_combine to compute the
24-hour
>> sums:
>>
>>
>> # Get the 06 hour precip from the files explicitly listed and add
them up
>>
>>
>> *met-8.0/bin/pcp_combine -add gfs.t00z.pgrb2.0p25.f102 06
>> gfs.t00z.pgrb2.0p25.f108 06 gfs.t00z.pgrb2.0p25.f114 06
>> gfs.t00z.pgrb2.0p25.f120 06 gfs_add.nc <http://gfs_add.nc>*
>>
>>
>>
>> # Based on the specified timing info, search the current directory
for
>> GRIB
>> files with the need precip accumulations and sum them up
>>
>>
>>
>> *met-8.0/bin/pcp_combine -sum 2018110600 06 2018111100 24
gfs_sum.nc
>> <http://gfs_sum.nc> -pcpdir ./*
>>
>>
>> Both these commands result in the same output accumulation
interval.
>>
>>
>> Hope this helps clarify.
>>
>>
>> FYI, I always prefer it when models write out runtime
accumulations.  That
>> way, you only need 2 files... the beginning/ending of the time
interval.
>>
>>
>> Thanks,
>> John
>>
>> On Wed, Nov 7, 2018 at 11:00 AM Debasish Hazra via RT
<met_help at ucar.edu>
>> wrote:
>>
>> >
>> > Wed Nov 07 10:59:52 2018: Request 87692 was acted upon.
>> > Transaction: Ticket created by debasish.hazra5 at gmail.com
>> >        Queue: met_help
>> >      Subject: Combine GFS fields for precip
>> >        Owner: Nobody
>> >   Requestors: debasish.hazra5 at gmail.com
>> >       Status: new
>> >  Ticket <URL:
https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=87692 >
>> >
>> >
>> > Hi,
>> >
>> > How does MET PCP_combine routine work if I want to use it for
>> accumulation
>> > of precipitation for GFS files over 24,72 or 120h period. For
example,
>> take
>> > any day data from
>> >
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/
>> and
>> > if I have files : gfs.t00z.pgrb2.0p25.f006
>> > <https://mail.google.com/mail/u/0/gfs.t00z.pgrb2.0p25.f006>,
>> > gfs.t00z.pgrb2.0p25.f012,
>> > <https://mail.google.com/mail/u/0/gfs.t00z.pgrb2.0p25.f006
>> > >gfs.t00z.pgrb2.0p25.f018
>> > and  <https://mail.google.com/mail/u/0/gfs.t00z.pgrb2.0p25.f006>
>> > gfs.t00z.pgrb2.0p25.f024 and each of them has 6hour average
>> precipitation.
>> > How do I make 1day accumulated precipitation using pcp_combine,
do I
>> have
>> > to explicitly mention all the four the input files in config file
?
>> Also,
>> > same for 5day average, do I have to mention all 20 file names in
config
>> > file to get ncetcdf output ?
>> >
>> > Thanks
>> > Debasish
>> >
>> >
>>
>>

------------------------------------------------
Subject: Combine GFS fields for precip
From: John Halley Gotway
Time: Thu Nov 08 17:00:07 2018

Deb,

You are correct, by default, pcp_combine searches for records of APCP.

You can use the "-field" option to tell it to look for something
different:

*met-8.0/bin/pcp_combine -add gfs.t00z.pgrb2.0p25.f102 06
gfs.t00z.pgrb2.0p25.f108 06 gfs.t00z.pgrb2.0p25.f114 06
gfs.t00z.pgrb2.0p25.f120 06 gfs_add_ACPCP.nc -field 'name="ACPCP";
level="A6";'*

The "field" string must contain settings for name (i.e. GRIB2 abbrev
for
Conv Precip) and level ("A6" means a 6-hour accumulation).

If you wanted to sum up the 2-m temperature values (not that that's a
good
idea or anything), you'd use:
   -field 'name="TMP"; level="Z2";'

The add commands you sent look fine to me.  Remember that the "-sum"
option
can do the same thing but with much fewer command line arguments.  But
it's
up to you to decide which you prefer.

Thanks,
John

On Thu, Nov 8, 2018 at 12:01 PM Debasish Hazra via RT
<met_help at ucar.edu>
wrote:

>
> <URL: https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=87692 >
>
> One more thing to know, pcp_combine by default sum or adds APCP from
gfs
> files. How do I specify APCP for convective precipitation to get a
similar
> combination of day 1 or 5 day total precipitation ?
>
> Thanks
> Debasish
>
> On Thu, Nov 8, 2018 at 1:49 PM Debasish Hazra
<debasish.hazra5 at gmail.com>
> wrote:
>
> > Thanks John for detail answer. Based on your answer, I created two
.sh
> > file one for adding APCP for day 1 and another for 5 days.
> >
> > #Day 1 : pcp_combine -add \
> > $WORKDIR/gfs.t00z.pgrb2.0p25.f006.grib2 06 \
> > $WORKDIR/gfs.t00z.pgrb2.0p25.f012.grib2 06 \
> > $WORKDIR/gfs.t00z.pgrb2.0p25.f018.grib2 06 \
> > $WORKDIR/gfs.t00z.pgrb2.0p25.f024.grib2 06 \
> > $OUTDIR/gfs_APCP_24_2018060200_F06_F24.nc \
> > -v 5
> > and
> > #Day 5 :
> > pcp_combine -add \
> > $WORKDIR/gfs.t00z.pgrb2.0p25.f006.grib2 06 \
> > $WORKDIR/gfs.t00z.pgrb2.0p25.f012.grib2 06 \
> > $WORKDIR/gfs.t00z.pgrb2.0p25.f018.grib2 06 \
> > $WORKDIR/gfs.t00z.pgrb2.0p25.f024.grib2 06 \
> > $WORKDIR/gfs.t00z.pgrb2.0p25.f030.grib2 06 \
> > $WORKDIR/gfs.t00z.pgrb2.0p25.f036.grib2 06 \
> > $WORKDIR/gfs.t00z.pgrb2.0p25.f042.grib2 06 \
> > $WORKDIR/gfs.t00z.pgrb2.0p25.f048.grib2 06 \
> > $WORKDIR/gfs.t00z.pgrb2.0p25.f054.grib2 06 \
> > $WORKDIR/gfs.t00z.pgrb2.0p25.f060.grib2 06 \
> > $WORKDIR/gfs.t00z.pgrb2.0p25.f066.grib2 06 \
> > $WORKDIR/gfs.t00z.pgrb2.0p25.f072.grib2 06 \
> > $WORKDIR/gfs.t00z.pgrb2.0p25.f078.grib2 06 \
> > $WORKDIR/gfs.t00z.pgrb2.0p25.f084.grib2 06 \
> > $WORKDIR/gfs.t00z.pgrb2.0p25.f090.grib2 06 \
> > $WORKDIR/gfs.t00z.pgrb2.0p25.f096.grib2 06 \
> > $WORKDIR/gfs.t00z.pgrb2.0p25.f102.grib2 06 \
> > $WORKDIR/gfs.t00z.pgrb2.0p25.f108.grib2 06 \
> > $WORKDIR/gfs.t00z.pgrb2.0p25.f114.grib2 06 \
> > $WORKDIR/gfs.t00z.pgrb2.0p25.f120.grib2 06 \
> > $OUTDIR/gfs_APCP_120_2018060200_F06_F120.nc \
> >
> > Running them and using ncl_filedump I found total precipitation
for 1 day
> > and 5 day, one combining 4 files and other combining 20 files. I
hope I
> am
> > doing it right.
> >
> > Thanks
> > Debasish
> >
> > On Wed, Nov 7, 2018 at 1:38 PM John Halley Gotway via RT <
> > met_help at ucar.edu> wrote:
> >
> >> Hi Deb,
> >>
> >> I see that you have a question about the pcp_combine tool and the
> >> computation of accumulated precipitation.
> >>
> >> The answer really depends on how precip is stored in your model
output.
> >> In
> >> general, I've seen precip stored in 3 different ways:
> >>
> >> (1) Store it as a runtime accumulation... meaning the 6 hour
forecast
> >> contains precip from 0 to 6 hours, and 120 hour forecast contains
precip
> >> from 0 to 120 hours.  In this case, you'll find the pcp_combine
> >> "-subtract"
> >> option to be very useful.
> >>
> >> (2) Store it in a pre-defined bucket, perhaps a 6-hour bucket.
In this
> >> case, the 6-hour forecast would contain 0 to 6, but the 120 hour
> forecast
> >> would contain 114 to 120.  In this case, you'll find the
pcp_combine
> >> "-add"
> >> and "-sum" options to be very useful.
> >>
> >> (3) Store it in multiple accumulation intervals.  The 120-hour
forecast
> >> may
> >> contain 6, 12, and 24-hour accumulations.
> >>
> >> The logic of running pcp_combine really depends on how precip is
stored
> in
> >> the model output.  So let's look at the GFS example you
referenced:
> >>
> >> *wget
> >>
>
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f120
> >> <
> >>
>
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f120
> >> >
> >> *
> >> *wgrib2 gfs.t00z.pgrb2.0p25.f120 | grep APCP*
> >>
> >> 293:148405407:d=2018110600:APCP:surface:114-120 hour acc fcst:
> >>
> >>
> >> Looks like GFS contain type (2) with a 6-hourly accumulation.  If
you're
> >> interested in the 24-hour accumulation ending at 120 hours, you'd
need
> to
> >> use the 120, 114, 108, and 102 hour forecasts to compute that.
To
> >> demonstrate, I downloaded those 4 files:
> >>
> >>
> >> *wget
> >>
>
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f120
> >> <
> >>
>
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f120
> >> >
> >> *
> >>
> >> *wget
> >>
>
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f114
> >> <
> >>
>
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f114
> >> >
> >> *
> >>
> >> *wget
> >>
>
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f108
> >> <
> >>
>
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f108
> >> >
> >> *
> >>
> >> *wget
> >>
>
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f102
> >> <
> >>
>
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f102
> >> >
> >> *
> >>
> >>
> >> And then here are examples of running pcp_combine to compute the
24-hour
> >> sums:
> >>
> >>
> >> # Get the 06 hour precip from the files explicitly listed and add
them
> up
> >>
> >>
> >> *met-8.0/bin/pcp_combine -add gfs.t00z.pgrb2.0p25.f102 06
> >> gfs.t00z.pgrb2.0p25.f108 06 gfs.t00z.pgrb2.0p25.f114 06
> >> gfs.t00z.pgrb2.0p25.f120 06 gfs_add.nc <http://gfs_add.nc>*
> >>
> >>
> >>
> >> # Based on the specified timing info, search the current
directory for
> >> GRIB
> >> files with the need precip accumulations and sum them up
> >>
> >>
> >>
> >> *met-8.0/bin/pcp_combine -sum 2018110600 06 2018111100 24
gfs_sum.nc
> >> <http://gfs_sum.nc> -pcpdir ./*
> >>
> >>
> >> Both these commands result in the same output accumulation
interval.
> >>
> >>
> >> Hope this helps clarify.
> >>
> >>
> >> FYI, I always prefer it when models write out runtime
accumulations.
> That
> >> way, you only need 2 files... the beginning/ending of the time
interval.
> >>
> >>
> >> Thanks,
> >> John
> >>
> >> On Wed, Nov 7, 2018 at 11:00 AM Debasish Hazra via RT <
> met_help at ucar.edu>
> >> wrote:
> >>
> >> >
> >> > Wed Nov 07 10:59:52 2018: Request 87692 was acted upon.
> >> > Transaction: Ticket created by debasish.hazra5 at gmail.com
> >> >        Queue: met_help
> >> >      Subject: Combine GFS fields for precip
> >> >        Owner: Nobody
> >> >   Requestors: debasish.hazra5 at gmail.com
> >> >       Status: new
> >> >  Ticket <URL:
https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=87692
> >
> >> >
> >> >
> >> > Hi,
> >> >
> >> > How does MET PCP_combine routine work if I want to use it for
> >> accumulation
> >> > of precipitation for GFS files over 24,72 or 120h period. For
example,
> >> take
> >> > any day data from
> >> >
>
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/
> >> and
> >> > if I have files : gfs.t00z.pgrb2.0p25.f006
> >> > <https://mail.google.com/mail/u/0/gfs.t00z.pgrb2.0p25.f006>,
> >> > gfs.t00z.pgrb2.0p25.f012,
> >> > <https://mail.google.com/mail/u/0/gfs.t00z.pgrb2.0p25.f006
> >> > >gfs.t00z.pgrb2.0p25.f018
> >> > and
<https://mail.google.com/mail/u/0/gfs.t00z.pgrb2.0p25.f006>
> >> > gfs.t00z.pgrb2.0p25.f024 and each of them has 6hour average
> >> precipitation.
> >> > How do I make 1day accumulated precipitation using pcp_combine,
do I
> >> have
> >> > to explicitly mention all the four the input files in config
file ?
> >> Also,
> >> > same for 5day average, do I have to mention all 20 file names
in
> config
> >> > file to get ncetcdf output ?
> >> >
> >> > Thanks
> >> > Debasish
> >> >
> >> >
> >>
> >>
>
>

------------------------------------------------
Subject: Combine GFS fields for precip
From: Debasish Hazra
Time: Fri Nov 09 09:32:35 2018

Many thanks John. It works fine.

Debasish

On Thu, Nov 8, 2018 at 7:00 PM John Halley Gotway via RT
<met_help at ucar.edu>
wrote:

> Deb,
>
> You are correct, by default, pcp_combine searches for records of
APCP.
>
> You can use the "-field" option to tell it to look for something
different:
>
> *met-8.0/bin/pcp_combine -add gfs.t00z.pgrb2.0p25.f102 06
> gfs.t00z.pgrb2.0p25.f108 06 gfs.t00z.pgrb2.0p25.f114 06
> gfs.t00z.pgrb2.0p25.f120 06 gfs_add_ACPCP.nc -field 'name="ACPCP";
> level="A6";'*
>
> The "field" string must contain settings for name (i.e. GRIB2 abbrev
for
> Conv Precip) and level ("A6" means a 6-hour accumulation).
>
> If you wanted to sum up the 2-m temperature values (not that that's
a good
> idea or anything), you'd use:
>    -field 'name="TMP"; level="Z2";'
>
> The add commands you sent look fine to me.  Remember that the "-sum"
option
> can do the same thing but with much fewer command line arguments.
But it's
> up to you to decide which you prefer.
>
> Thanks,
> John
>
>
> On Thu, Nov 8, 2018 at 12:01 PM Debasish Hazra via RT
<met_help at ucar.edu>
> wrote:
>
> >
> > <URL: https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=87692 >
> >
> > One more thing to know, pcp_combine by default sum or adds APCP
from gfs
> > files. How do I specify APCP for convective precipitation to get a
> similar
> > combination of day 1 or 5 day total precipitation ?
> >
> > Thanks
> > Debasish
> >
> > On Thu, Nov 8, 2018 at 1:49 PM Debasish Hazra
<debasish.hazra5 at gmail.com
> >
> > wrote:
> >
> > > Thanks John for detail answer. Based on your answer, I created
two .sh
> > > file one for adding APCP for day 1 and another for 5 days.
> > >
> > > #Day 1 : pcp_combine -add \
> > > $WORKDIR/gfs.t00z.pgrb2.0p25.f006.grib2 06 \
> > > $WORKDIR/gfs.t00z.pgrb2.0p25.f012.grib2 06 \
> > > $WORKDIR/gfs.t00z.pgrb2.0p25.f018.grib2 06 \
> > > $WORKDIR/gfs.t00z.pgrb2.0p25.f024.grib2 06 \
> > > $OUTDIR/gfs_APCP_24_2018060200_F06_F24.nc \
> > > -v 5
> > > and
> > > #Day 5 :
> > > pcp_combine -add \
> > > $WORKDIR/gfs.t00z.pgrb2.0p25.f006.grib2 06 \
> > > $WORKDIR/gfs.t00z.pgrb2.0p25.f012.grib2 06 \
> > > $WORKDIR/gfs.t00z.pgrb2.0p25.f018.grib2 06 \
> > > $WORKDIR/gfs.t00z.pgrb2.0p25.f024.grib2 06 \
> > > $WORKDIR/gfs.t00z.pgrb2.0p25.f030.grib2 06 \
> > > $WORKDIR/gfs.t00z.pgrb2.0p25.f036.grib2 06 \
> > > $WORKDIR/gfs.t00z.pgrb2.0p25.f042.grib2 06 \
> > > $WORKDIR/gfs.t00z.pgrb2.0p25.f048.grib2 06 \
> > > $WORKDIR/gfs.t00z.pgrb2.0p25.f054.grib2 06 \
> > > $WORKDIR/gfs.t00z.pgrb2.0p25.f060.grib2 06 \
> > > $WORKDIR/gfs.t00z.pgrb2.0p25.f066.grib2 06 \
> > > $WORKDIR/gfs.t00z.pgrb2.0p25.f072.grib2 06 \
> > > $WORKDIR/gfs.t00z.pgrb2.0p25.f078.grib2 06 \
> > > $WORKDIR/gfs.t00z.pgrb2.0p25.f084.grib2 06 \
> > > $WORKDIR/gfs.t00z.pgrb2.0p25.f090.grib2 06 \
> > > $WORKDIR/gfs.t00z.pgrb2.0p25.f096.grib2 06 \
> > > $WORKDIR/gfs.t00z.pgrb2.0p25.f102.grib2 06 \
> > > $WORKDIR/gfs.t00z.pgrb2.0p25.f108.grib2 06 \
> > > $WORKDIR/gfs.t00z.pgrb2.0p25.f114.grib2 06 \
> > > $WORKDIR/gfs.t00z.pgrb2.0p25.f120.grib2 06 \
> > > $OUTDIR/gfs_APCP_120_2018060200_F06_F120.nc \
> > >
> > > Running them and using ncl_filedump I found total precipitation
for 1
> day
> > > and 5 day, one combining 4 files and other combining 20 files. I
hope I
> > am
> > > doing it right.
> > >
> > > Thanks
> > > Debasish
> > >
> > > On Wed, Nov 7, 2018 at 1:38 PM John Halley Gotway via RT <
> > > met_help at ucar.edu> wrote:
> > >
> > >> Hi Deb,
> > >>
> > >> I see that you have a question about the pcp_combine tool and
the
> > >> computation of accumulated precipitation.
> > >>
> > >> The answer really depends on how precip is stored in your model
> output.
> > >> In
> > >> general, I've seen precip stored in 3 different ways:
> > >>
> > >> (1) Store it as a runtime accumulation... meaning the 6 hour
forecast
> > >> contains precip from 0 to 6 hours, and 120 hour forecast
contains
> precip
> > >> from 0 to 120 hours.  In this case, you'll find the pcp_combine
> > >> "-subtract"
> > >> option to be very useful.
> > >>
> > >> (2) Store it in a pre-defined bucket, perhaps a 6-hour bucket.
In
> this
> > >> case, the 6-hour forecast would contain 0 to 6, but the 120
hour
> > forecast
> > >> would contain 114 to 120.  In this case, you'll find the
pcp_combine
> > >> "-add"
> > >> and "-sum" options to be very useful.
> > >>
> > >> (3) Store it in multiple accumulation intervals.  The 120-hour
> forecast
> > >> may
> > >> contain 6, 12, and 24-hour accumulations.
> > >>
> > >> The logic of running pcp_combine really depends on how precip
is
> stored
> > in
> > >> the model output.  So let's look at the GFS example you
referenced:
> > >>
> > >> *wget
> > >>
> >
>
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f120
> > >> <
> > >>
> >
>
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f120
> > >> >
> > >> *
> > >> *wgrib2 gfs.t00z.pgrb2.0p25.f120 | grep APCP*
> > >>
> > >> 293:148405407:d=2018110600:APCP:surface:114-120 hour acc fcst:
> > >>
> > >>
> > >> Looks like GFS contain type (2) with a 6-hourly accumulation.
If
> you're
> > >> interested in the 24-hour accumulation ending at 120 hours,
you'd need
> > to
> > >> use the 120, 114, 108, and 102 hour forecasts to compute that.
To
> > >> demonstrate, I downloaded those 4 files:
> > >>
> > >>
> > >> *wget
> > >>
> >
>
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f120
> > >> <
> > >>
> >
>
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f120
> > >> >
> > >> *
> > >>
> > >> *wget
> > >>
> >
>
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f114
> > >> <
> > >>
> >
>
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f114
> > >> >
> > >> *
> > >>
> > >> *wget
> > >>
> >
>
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f108
> > >> <
> > >>
> >
>
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f108
> > >> >
> > >> *
> > >>
> > >> *wget
> > >>
> >
>
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f102
> > >> <
> > >>
> >
>
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/gfs.t00z.pgrb2.0p25.f102
> > >> >
> > >> *
> > >>
> > >>
> > >> And then here are examples of running pcp_combine to compute
the
> 24-hour
> > >> sums:
> > >>
> > >>
> > >> # Get the 06 hour precip from the files explicitly listed and
add them
> > up
> > >>
> > >>
> > >> *met-8.0/bin/pcp_combine -add gfs.t00z.pgrb2.0p25.f102 06
> > >> gfs.t00z.pgrb2.0p25.f108 06 gfs.t00z.pgrb2.0p25.f114 06
> > >> gfs.t00z.pgrb2.0p25.f120 06 gfs_add.nc <http://gfs_add.nc>*
> > >>
> > >>
> > >>
> > >> # Based on the specified timing info, search the current
directory for
> > >> GRIB
> > >> files with the need precip accumulations and sum them up
> > >>
> > >>
> > >>
> > >> *met-8.0/bin/pcp_combine -sum 2018110600 06 2018111100 24
gfs_sum.nc
> > >> <http://gfs_sum.nc> -pcpdir ./*
> > >>
> > >>
> > >> Both these commands result in the same output accumulation
interval.
> > >>
> > >>
> > >> Hope this helps clarify.
> > >>
> > >>
> > >> FYI, I always prefer it when models write out runtime
accumulations.
> > That
> > >> way, you only need 2 files... the beginning/ending of the time
> interval.
> > >>
> > >>
> > >> Thanks,
> > >> John
> > >>
> > >> On Wed, Nov 7, 2018 at 11:00 AM Debasish Hazra via RT <
> > met_help at ucar.edu>
> > >> wrote:
> > >>
> > >> >
> > >> > Wed Nov 07 10:59:52 2018: Request 87692 was acted upon.
> > >> > Transaction: Ticket created by debasish.hazra5 at gmail.com
> > >> >        Queue: met_help
> > >> >      Subject: Combine GFS fields for precip
> > >> >        Owner: Nobody
> > >> >   Requestors: debasish.hazra5 at gmail.com
> > >> >       Status: new
> > >> >  Ticket <URL:
> https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=87692
> > >
> > >> >
> > >> >
> > >> > Hi,
> > >> >
> > >> > How does MET PCP_combine routine work if I want to use it for
> > >> accumulation
> > >> > of precipitation for GFS files over 24,72 or 120h period. For
> example,
> > >> take
> > >> > any day data from
> > >> >
> >
http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2018110600/
> > >> and
> > >> > if I have files : gfs.t00z.pgrb2.0p25.f006
> > >> > <https://mail.google.com/mail/u/0/gfs.t00z.pgrb2.0p25.f006>,
> > >> > gfs.t00z.pgrb2.0p25.f012,
> > >> > <https://mail.google.com/mail/u/0/gfs.t00z.pgrb2.0p25.f006
> > >> > >gfs.t00z.pgrb2.0p25.f018
> > >> > and
<https://mail.google.com/mail/u/0/gfs.t00z.pgrb2.0p25.f006>
> > >> > gfs.t00z.pgrb2.0p25.f024 and each of them has 6hour average
> > >> precipitation.
> > >> > How do I make 1day accumulated precipitation using
pcp_combine, do I
> > >> have
> > >> > to explicitly mention all the four the input files in config
file ?
> > >> Also,
> > >> > same for 5day average, do I have to mention all 20 file names
in
> > config
> > >> > file to get ncetcdf output ?
> > >> >
> > >> > Thanks
> > >> > Debasish
> > >> >
> > >> >
> > >>
> > >>
> >
> >
>
>

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