[gradsusr] Extracting time specific grib data using wgrib

[Charles Langton Vanya]

David,
Thank you for your insight, I will give it a try.
Regards
Charles

On 07/05/2018, Davide Sacchetti <davide.sacchetti at arpal.gov.it> wrote:
> wgrib all_cosmodata | grep ':78hr fcst:' | egrep -i ":VGRD:|:UGRD:" \
> | wgrib -grib -i  all_cosmodata
>
> (in our suite U:kpds5=33:kpds6=110 -> UGRD)
>
>
> bye bye
> Davide
>
> On Mon, 2018-05-07 at 05:07 +0000, Charles Vanya wrote:
>> Dear All,
>> I am humbly looking for assistance. I have hourly data from COSMO
>> model which span for 78 hours and is in grib format. I would like to
>> extract specific variables for the whole 78hours and concatenate it
>> as one grib file.
>> I have tried to concatenate the files and when i run the wgrib
>> command to extract the variables i am looking for, i am only getting
>> data file for 2 days.
>> I started like this:
>> cat lfff00000000c lfff*00 > all_cosmodata
>>  To extract for specific variables
>> wgrib all_cosmodata | egrep -i
>> ":V:kpds5=34:kpds6:=110:|:U:kpds5=33:kpds6=110:" | wgrib -grep  -i
>> all_cosmodata -o cosmodata_uv
>> Here am trying to extract surface u and v component of wind for all
>> 78hrs.
>> However my output shows me that i have only extracted two hours data.
>> Now my question is, how can i include the time steps so that i
>> extract all 78 hrs at once.
>> Your assistance will be highly appreciated.
>> Charles Langton Vanya
>> Chief Meteorological
>> Prediction Section
>> Dept. of Climate Change and Meteorological Services
>> P.O.Box 1808,
>> Blantyre.
>> Malawi
>> Tel:+265888980545
>> Sent from Yahoo Mail on Android
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>
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