[gradsusr] GRIB-1/GrADS Diagnosis

[Perry, Aaron]

Hi Jeff,


I figured out what the problem was. A simple, incorrect file path in a custom GIS GrADS script that I run was the culprit!


Aaron D. Perry
Dept. of Atmospheric Sciences
Class of 2016
Lyndon State College
Lyndonville, VT
Twitter: <https://twitter.com/AaronPerryLSC> <https://www.twitter.com/AaronPerryLSC> @AaronPerryLSC<https://twitter.com/AaronPerryLSC>
Mobile: 617-780-4312
Web: shearanalytics.net<http://shearanalytics.net/>
Email: Aaron.Perry at lyndonstate.edu<http://Aaron.Perry@lyndonstate.edu>
________________________________
From: gradsusr-bounces at gradsusr.org <gradsusr-bounces at gradsusr.org> on behalf of Jeff Duda <jeffduda319 at gmail.com>
Sent: Thursday, April 23, 2015 5:52 PM
To: GrADS Users Forum
Subject: Re: [gradsusr] GRIB-1/GrADS Diagnosis

Aaron,
I guess my first question is why does your control file have only 5 VAR entries? I downloaded the same file and ran grib2ctl.pl<http://grib2ctl.pl> on it and the var list has 133 entries in the control file I got. Check your file size. On the NOMADS site the file has a size of 115 MB. If yours is substantially smaller, it could mean there was an error while downloading the file.

I don't generally use the file meso-eta-hi because I'm not sure what it means, but what's weird is the contents are identical to those in the nam directory, which I assume is 12 km NAM output.

Also, I see from your dset entry your file name is different than that on the NOMADS server. How and why did it get changed? It's possible if someone else had the file before you they may have manipulated it, and that may cause the trouble.

Jeff


On Thu, Apr 23, 2015 at 12:10 PM, Perry, Aaron <Aaron.Perry at lsc.vsc.edu<mailto:Aaron.Perry at lsc.vsc.edu>> wrote:
Hi Jeff,

I'm currently using the data locating in the following directory:

http://nomads.ncdc.noaa.gov/data/meso-eta-hi/201412/20141207/

Aaron D. Perry
Dept. of Atmospheric Sciences
Class of 2016
Lyndon State College
Lyndonville, VT
Twitter: @AaronPerryLSC
Mobile: 617-780-4312
Web: shearanalytics.net<http://shearanalytics.net>
Email: Aaron.Perry at lyndonstate.edu<mailto:Aaron.Perry at lyndonstate.edu>

________________________________________
From: gradsusr-bounces at gradsusr.org<mailto:gradsusr-bounces at gradsusr.org> [gradsusr-bounces at gradsusr.org<mailto:gradsusr-bounces at gradsusr.org>] on behalf of Jeff Duda [jeffduda319 at gmail.com<mailto:jeffduda319 at gmail.com>]
Sent: Thursday, April 23, 2015 1:00 PM
To: GrADS Users Forum
Subject: Re: [gradsusr] GRIB-1/GrADS Diagnosis

Exactly which NAM data are you obtaining? Give a URL.

On Thu, Apr 23, 2015 at 11:11 AM, Perry, Aaron <Aaron.Perry at lsc.vsc.edu<mailto:Aaron.Perry at lsc.vsc.edu><mailto:Aaron.Perry at lsc.vsc.edu<mailto:Aaron.Perry at lsc.vsc.edu>>> wrote:

Hi All,


I'm currently having an issue with getting GRIB-1 data to be processed in GrADS. I'm using archived 12km NAM data from the NCDC NOMADS Server. I get the "Constant field.  Value = 0" error...


Below is the control file that I've created using grib2ctl:


dset /mnt/homes/perrya/jaycasestudy/data/nam/nam12.2014120700.%f3.grb
index /mnt/homes/perrya/jaycasestudy/data/nam/nam12.2014120700.000.grb.idx
undef 9.999E+20
title /mnt/homes/perrya/jaycasestudy/data/nam/nam12.2014120700.000.grb
*  produced by grib2ctl v0.9.13
* command line options: -verf /mnt/homes/perrya/jaycasestudy/data/nam/nam12.2014120700.%f3.grb
dtype grib 218
options template
pdef 614 428 lccr 12.190000 -133.459000 1 1 25.000000 25.000000 -95.000000 12191 12191
xdef 614 linear -133.459000 0.113383763365335
ydef 428 linear 12.190000 0.110827272727273
tdef 29 linear 00Z07dec2014 3hr
zdef 1 linear 1 1
vars 5
APCPsfc  0 61,1,0  ** surface Total precipitation [kg/m^2]
PRMSLmsl  0 2,102,0 ** mean-sea level Pressure reduced to MSL [Pa]
TMP2m  0 11,105,2 ** 2 m above ground Temp. [K]
UGRD10m  0 33,105,10 ** 10 m above ground u wind [m/s]
VGRD10m  0 34,105,10 ** 10 m above ground v wind [m/s]
ENDVARS


What am I doing wrong?

Aaron D. Perry
Dept. of Atmospheric Sciences
Class of 2016
Lyndon State College
Lyndonville, VT
Twitter: <https://twitter.com/AaronPerryLSC> <https://www.twitter.com/AaronPerryLSC> @AaronPerryLSC<https://twitter.com/AaronPerryLSC>
Mobile: 617-780-4312
Web: shearanalytics.net<http://shearanalytics.net><http://shearanalytics.net/>
Email: Aaron.Perry at lyndonstate.edu<mailto:Aaron.Perry at lyndonstate.edu><http://Aaron.Perry@lyndonstate.edu>

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--
Jeff Duda
Graduate research assistant
University of Oklahoma School of Meteorology
Center for Analysis and Prediction of Storms

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--
Jeff Duda
Graduate research assistant
University of Oklahoma School of Meteorology
Center for Analysis and Prediction of Storms
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