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

[Ben Quinn]

Interestingly the GUSTsfc variable seems to be stripped out of the 
dataset over DODS? It's not listed in the variable listing (for any of 
the GFS datasets - on NOMADS or Monsoondata)

http://nomads.ncep.noaa.gov:9090/dods/gfs_hd/gfs_hd20130901/gfs_hd_12z.info

Actually I notice there are 227 variables available there while the 
master dataset available through HTTP/Grib Filter contains 250 variables 
- so quite a few variables aren't available.  Not sure of the reason for 
this?

Kind regards,

Ben


On 2/09/2013 9:07 AM, Ken Kato wrote:
> 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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>
>
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