[gradsusr] Displaying GFS wind gust speeds [SEC=UNOFFICIAL]

[Ken Kato]

Hi Ben and all,

Yep I've tried that but it still comes up with:

Syntax Error:  Invalid Operand
  'gustsfc' not a variable or function name

Ken.


________________________________
From: gradsusr-bounces at gradsusr.org [mailto:gradsusr-bounces at gradsusr.org] On Behalf Of Ben Quinn
Sent: Monday, 2 September 2013 9:01 AM
To: gradsusr at gradsusr.org
Subject: Re: [gradsusr] Displaying GFS wind gust speeds [SEC=UNOFFICIAL]

Hi Ken,

There doesn't seem to be any direction data in the GUSTsfc variable, only the wind gust speed itself.  On the page that you link to the associated grads script simply displays the GUSTsfc variable by

'd GUSTsfc * 1.9438449'

Kind regards,

Ben


On 2/09/2013 8:50 AM, Ken Kato wrote:
Hi all,

Does anyone know how to display surface wind gust speeds using the GFS datasets (self-describing format, high definition) from either the NOMAD or monsoondata servers?
For example, if I use the script below:

'sdfopen http://nomads.ncep.noaa.gov:9090/dods/gfs_hd/gfs_hd20130901/gfs_hd_12z'<http://nomads.ncep.noaa.gov:9090/dods/gfs_hd/gfs_hd20130901/gfs_hd_12z%27>
'set LAT -47 -8'
'set LON 105 160'
'set lev 1000'
'set t 5'
'd mag(ugrd10m,vgrd10m,gustssfc)'

... it just results in:

Error from MAG:  Too many or too few args
                 Two arguments expected
Operation Error:  Error from mag function
  Error ocurred at column 1
DISPLAY error:  Invalid expression

I've tried all sorts of different combinations such as "d mag(ugrd10m;vgrd10m;gustssfc)", "d gustssfc", etc as well as the GFS data from monsoondata but no luck. However, some websites offer GFS wind gust speed charts (e.g. http://forecasts.bsch.com.au/stormcast.html?ops=gfs:2013090106:2013090606:aus:gustssfc:null#sc) and I've seen the "gustssfc" variable mentioned in past discussions but doesn't appear in the datasets' variables list.

Ken.





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