[gradsusr] Moving to grib data?

[Becker, Bernd]

Olli,

no need to down load anything.

open grads
 
sdfopen
http://nomads.ncep.noaa.gov:9090/dods/gfs_hd/gfs_hd20120710/gfs_hd_00z
Scanning self-describing file:
http://nomads.ncep.noaa.gov:9090/dods/gfs_hd/gfs_hd20120710/gfs_hd_00z
SDF file
http://nomads.ncep.noaa.gov:9090/dods/gfs_hd/gfs_hd20120710/gfs_hd_00z
is open as file 1
LON set to 0 360 
LAT set to -90 90 
LEV set to 1000 1000 
Time values set: 2012:7:10:0 2012:7:10:0 
E set to 1 1 
ga-> set lat 40 65
LAT set to 40 65 
ga-> set lon -20 40
LON set to -20 40 

d hgtsfc


q file to see other variables
and go from there. 

Cheers,


--
Bernd Becker   Climate Impacts Product Development
Met Office Hadley Centre    FitzRoy Road  Exeter   Devon EX1 3PB  United
Kingdom
Tel.: +44 (0) 1392 884511 Fax: +44 (0)870 900 5050
E-mail:bernd.becker at metoffice.gov.uk -
http://www.metoffice.gov.uk/research/our-scientists/seasonal-to-decadal/
bernd-becker

-----Original Message-----
From: gradsusr-bounces at gradsusr.org
[mailto:gradsusr-bounces at gradsusr.org] On Behalf Of Olli Myllynen
Sent: 15 July 2012 14:37
To: gradsusr at gradsusr.org
Subject: [gradsusr] Moving to grib data?

Hello GrADS community,

I am using Grads to get 10 day GFS weather forecasts for Southern
Finland as a website administrator. I am not a metheorologist by
education, and thus have limited knowledge of the data systems in this
field.

So far I have been using ASCII downloads directly into Grads with a
command 'sdfopen
'http://nomads.ncep.noaa.gov:9090/dods/gfs_hd/gfs_hd'date'/gfs_hd_'hour'
z'
date and hour being the relevant values. I am currently loading quite a
lot of data over the net though I only need to draw weathermaps from
much a smaller set of data.

The variables I need are (as Grads variables) for tmp2m, tmpsfc,
prmslmsl, ugrd10m, vgrd10m, rh2m and u. The subregion I need the data
for is between long 15-35 East and lat 50-70 North. The interval for
forecasts is 3 hours and the granularity is as small as possible, I
believe 0.5 degree is what is available.

Now I have two needs:
1) to download the necessary dataset but not much more than that
2) to get that data into Grads for making the forecast maps.

By searching and reading I think that I should get the data in
grib/grib2 data format, but here my knowledge ends. I have got the
get_gfs.pl perl script, but I am still lost now.

I have been trying understand what I should dowload and how, but have
not yet seen a page which would explain me this though I have searched
the web. Perhaps the problem is that I really do not know what to look
for. Could someone give me pointers to right direction, please?

Olli
_______________________________________________
gradsusr mailing list
gradsusr at gradsusr.org
http://gradsusr.org/mailman/listinfo/gradsusr