[gradsusr] ECMWF Data

[CW Weather]

Hi Bill,

Yes i've scrolled through the page and that's where I found out you can 
call for single parameters but through the bytes in the idx file, which 
is useless unless you use python i suspect.

Thanks all the same,

Stu

On 02-02-2022 15:19, Bill Reilly wrote:

> Hello:
> 
> I had a look and tried using the data as well but had problems, so I 
> checked out the User Documentation page for this data:
> 
> https://confluence.ecmwf.int/display/UDOC/ECMWF+Open+Data+-+Real+Time
> 
> Maybe something on that page is useful to you.
> 
> Bill
> 
> --
> 
> Bill Reilly
> 
> (+34) 686-110-748
> 
> bill at passageweather.com
> www.passageweather.com [1]
> 
> On 02/02/2022 11:49, CW Weather wrote:
> 
>> Hello all,
>> 
>> ECMWF have made some data freely available on top of the WMO data 
>> sets. The link is here https://data.ecmwf.int/forecasts/. I have 
>> downloaded via wget for exmaple - 
>> https://data.ecmwf.int/forecasts/20220202/00z/0p4-beta/oper/20220202000000-6h-oper-fc.grib2 
>> and then run a simple perl command as follows;
>> 
>> @ECHO Please wait, concetenating grb files...
>> cat *.grb > ecmwf_grib.grib2
>> @ECHO Please wait, creating ctl file...
>> perl g2ctl.pl -verf ecmwf_grib.grib2 > ecmwf_grib.ctl
>> @ECHO Please wait, creating idx file...
>> gribmap -i ecmwf_grib.ctl -e
>> 
>> but as you can see on the attached image the control file hasn't got 
>> the variable names or values correct and TP (total precip) isn't 
>> possible to fathom on the file. Ive managed to guess most variable 
>> like pressure, t2m wind ect.
>> 
>> There is a way to download single variable per time step but you would 
>> have to input the length and/or bytes from the idx file for example - 
>> |wget https://data.ecmwf.int/forecasts 
>> <https://data.ecmwf.int/forecasts/20220202/00z/0p4-beta/oper/20220202000000-6h-oper-fc.grib2>/||20220125||/00z/0p4-beta/oper/||20220125000000||-24h-oper-fc.grib2 
>> --header=||"Range: bytes=17459800-18068845"|
>> 
>> However the range values will change on every time step and every 
>> forecast and as such wont be viable to run automatically. I know its 
>> possible in python but like others I dont use python so my question 
>> is, is there a way to use wgrib or maybe .inv to breakdown the gribs 
>> into readable format using a perl code?
>> 
>> -- Kind regards,
>> 
>> *Stuart Markham*
>> 
>> //
>> 
>> /Founder of CW Weather/
>> 
>> /Website: chorleyweather.com <https://www.chorleyweather.com/>/
>> 
>> _______________________________________________
>> gradsusr mailing list
>> gradsusr at gradsusr.org
>> http://gradsusr.org/mailman/listinfo/gradsusr
> 
> _______________________________________________
> gradsusr mailing list
> gradsusr at gradsusr.org
> http://gradsusr.org/mailman/listinfo/gradsusr

-- 
Kind regards,

Stuart Markham

__

_Founder of CW Weather_

_Website: chorleyweather.com [2]_

Links:
------
[1] http://www.passageweather.com
[2] https://www.chorleyweather.com/
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://gradsusr.org/pipermail/gradsusr/attachments/20220202/e33e92ea/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 6b66f0ed.png
Type: image/png
Size: 11158 bytes
Desc: not available
URL: <http://gradsusr.org/pipermail/gradsusr/attachments/20220202/e33e92ea/attachment-0001.png>