[ncl-talk] error plotting NAM grib2 data

[Andrew Kren - NOAA Affiliate]

I am working to plot NAM grib2 output on a map. NAM is on a two dimensional
latitude/longitude grid over the United States. When I run my script, I get
this error:

Coordinates:
(0)     0
(0)     check_for_y_lat_coord: Warning: Data either does not contain a
valid latitude coordinate array or doesn't contain one at all.
(0)     A valid latitude coordinate array should have a 'units' attribute
equal to one of the following values:
(0)         'degrees_north' 'degrees-north' 'degree_north' 'degrees north'
'degrees_N' 'Degrees_north' 'degree_N' 'degreeN' 'degreesN' 'deg north'
(0)     check_for_lon_coord: Warning: Data either does not contain a valid
longitude coordinate array or doesn't contain one at all.
(0)     A valid longitude coordinate array should have a 'units' attribute
equal to one of the following values:
(0)         'degrees_east' 'degrees-east' 'degree_east' 'degrees east'
'degrees_E' 'Degrees_east' 'degree_E' 'degreeE' 'degreesE' 'deg east'
warning:ContourPlotDraw: out of range coordinates encountered; standard
AreaFill rendering method may be unreliable;
 consider setting the resource trGridType to "TriangularMesh" if
coordinates contain missing values


I know what the error is but not sure how to rectify it. I have gotten this
error before when trying to plot WRF output. I've tried to add coordinates
and attributes to the variables but it won't work.

This is a print var summary of one of the variables for reference:

Variable: array_variable_hgt
Type: float
Total Size: 1051168 bytes
            262792 values
Number of Dimensions: 2
Dimensions and sizes:   [ygrid_0 | 428] x [xgrid_0 | 614]
Coordinates:
Number Of Attributes: 13
  initial_time :        11/26/2015 (00:00)
  forecast_time_units : hours
  forecast_time :       0
  level_type :  Isobaric surface (Pa)
  parameter_template_discipline_category_number :       ( 0, 0, 3, 5 )
  parameter_discipline_and_category :   Meteorological products, Mass
  grid_type :   Lambert Conformal can be secant or tangent, conical or
bipolar
  coordinates : gridlat_0 gridlon_0
  units :       gpm
  long_name :   Geopotential height
  production_status :   Operational products
  center :      US National Weather Service - NCEP (WMC)
  _FillValue :  1e+20

Thanks,

-- 
Andrew Kren, PhD
Research Scientist I, Global Observing Systems Analysis (GOSA) Group
NOAA ESRL Global Systems Division (Rm 3C515)
325 Broadway, Boulder, CO 80305
(303) 497-5418
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mailman.ucar.edu/pipermail/ncl-talk/attachments/20151127/076bda2f/attachment.html