[ncl-talk] Geopotential Height Zoomed Overlay Plot Help

Kerwyn Texeira ktish86 at gmail.com
Tue May 3 21:12:04 MDT 2016


Hi ncl-talk,

I'm trying to plot potential height at a certain pressure level across a
terrain with winds overlayed on a zoomed in plot. I'm seeing stars.  I"m
getting a long message that I don't have any idea what it means.

Error message:
warning:ContourPlotDraw: out of range coordinates encountered; standard ORV
rendering method may be unreliable;
 consider setting the resource trGridType to "TriangularMesh" if
coordinates contain missing values

My Script:

load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"
 load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_csm.ncl"
 load "$NCARG_ROOT/lib/ncarg/nclscripts/wrf/WRFUserARW.ncl"

begin
   a = addfile("./wrfout_d03_2014-01-11_22:40:00.nc","r")

  it = 0
  hgt       = wrf_user_getvar(a, "HGT", it)
  hgt at lat2d = wrf_user_getvar(a, "XLAT", it)
  hgt at lon2d = wrf_user_getvar(a, "XLONG", it)
  u         = wrf_user_getvar(a, "ua", it)
  v         = wrf_user_getvar(a, "va", it)
  p         = wrf_user_getvar(a, "pressure", it)
  qc        = wrf_user_getvar(a, "QCLOUD", it)
  qr        = wrf_user_getvar(a, "QRAIN", it)
  qs        = wrf_user_getvar(a, "QSNOW", it)
  qi        = wrf_user_getvar(a, "QICE", it)
  pre       = wrf_user_getvar(a, "RAINNC", it)
   z        = wrf_user_getvar(a, "z", it)

  u_wind    = wrf_user_intrp3d(u, p, "h", 600., 0.0, False)
  v_wind    = wrf_user_intrp3d(v, p, "h", 600., 0.0, False)
  qcl       = wrf_user_intrp3d(qc, p, "h", 600., 0.0, False)
  qrn       = wrf_user_intrp3d(qr, p, "h", 600., 0.0, False)
  qsn       = wrf_user_intrp3d(qs, p, "h", 600., 0.0, False)
  qice      = wrf_user_intrp3d(qi, p, "h", 600., 0.0, False)
  z_plane   = wrf_user_intrp3d(z, p, "h", 600., 0.0, False)

  qcl = qcl*1000
  qrn = qrn*1000
  qsn = qsn*1000
  qice = qice*1000
  precip = pre*0.03937
  froz = qice + qsn
  melt = qcl + qrn

  froz at lon2d = hgt at lon2d
  froz at lat2d = hgt at lat2d

  melt at lon2d = hgt at lon2d
  melt at lat2d = hgt at lat2d

 ; qcl at lon2d = hgt at lon2d
 ; qcl at lat2d = hgt at lat2d
 ; qrn at lon2d = hgt at lon2d
 ; qrn at lat2d = hgt at lat2d
 ; qsn at lon2d = hgt at lon2d
 ; qsn at lat2d = hgt at lat2d
 ; qice at lon2d = hgt at lon2d
 ; qice at lat2d = hgt at lat2d


   spd = (u_wind*u_wind + v_wind*v_wind)^(0.5)  ;m/s
   u_wind = u_wind*1.94384449
   v_wind = v_wind*1.94384449

   u_wind at lon2d =   hgt at lon2d
   u_wind at lat2d =   hgt at lat2d

   v_wind at lon2d =   hgt at lon2d
   v_wind at lat2d =   hgt at lat2d

 ; spd = spd*1.94384449
 ; spd at units = "Wind Speed"
 ; spd at units = "kts"

    wks_type = "png"
    wks_type at wkWidth = 2500
    wks_type at wkHeight = 2500
    wks = gsn_open_wks(wks_type,"geo")         ; send graphics to PNG file


; gsn_define_colormap(wks,"BlAqGrYeOrRe")
  gsn_define_colormap(wks,"matlab_jet")

  res = True
  res at gsnDraw      =  False                   ; do not draw the plot
  res at gsnFrame     =  False                   ; do not advance the frame
  res at cnLineLabelsOn       = False            ; do not use line labels
  res at cnFillOn             = True             ; color fill
  res at cnLinesOn            = False            ; do not draw contour lines



  res at tiMainString = ""
  res at pmTickMarkDisplayMode  = "Always"
  res at mpProjection  = "CylindricalEquidistant"    ;The default
  res at mpDataBaseVersion      = "MediumRes"
  res at mpOutlineOn            =True
  res at lbOrientation          = "Vertical"
  res at tiMainOffsetYF         = -0.03
  res at mpFillOn     = False
  res at mpOutlineOn  = True                  ; turn the map outline on
  res at mpMinLatF     = 37.85
  res at mpMaxLatF     = 38.50
  res at mpMinLonF     = -120.0
  res at mpMaxLonF     = -119.35
  res at gsnLeftString = ""
  res at gsnCenterString = "Geopotential Height at 600 hpa on Jan 11 at
22:40UTC"
  res at gsnStringFontHeightF = 0.020
  res at gsnRightString = ""
  res at gsnMaximize     = True
  res at mpShapeMode     = "FreeAspect"
  res at lbTitleString   = "Terrain (m)"
  res at lbTitlePosition = "Right"
  res at lbTitleDirection = "Across"
  res at lbTitleAngleF    = 90.
  res at lbTitleFontHeightF = 0.015


 ;------wind vectors
  res2 = True
  res2 at gsnDraw = False
  res2 at gsnFrame = False
  res2 at vcWindBarbLineThicknessF= 3.0
  res2 at vcRefLengthF= 0.018
  res2 at vcRefMagnitudeF= 10
  res2 at vcMinDistanceF = 0.05
  res2 at vcGlyphStyle = "WindBarb"
  res2 at gsnLeftString = ""
  res2 at gsnRightString = ""
  res2 at vcRefAnnoOn = False


;-------Frozen
;res3 = True
;res3 at cnLineColor = "Blue"
;res3 at gsnContourNegLineDashPattern = 2.0
;res3 at gsnContourLineThicknessesScale = 2.0
;res3 at gsnContourPosLineDashPattern = 3.0
;res3 at gsnContourZeroLineThicknessF = 0.0
;solid = gsn_csm_contour(wks,froz,res3)

;------Melted
;res4 = True
;res4 at cnLineColor = "Black"
;res4 at gsnContourLineThicknessesScale = 2.0
;res4 at cnLineLabelBackgroundColor = -1 ; transparent
;res4 at cnInfoLabelOn = False
;res4 at cnLevelSelectionMode = "ExplicitLevels"
;res4 at cnLevels = (/0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5,
0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 0.95, 1.0/)
;res4 at cnLineLabelFontHeightF = 0.01
;res4 at cnLineLabelDensityF =2
;res4 at cnLineLabelsOn = True
;liquid = gsn_csm_contour(wks,melt,res4)

;------Geopotential Height
res5 = True
res5 at cnLineColor = "Black"
res5 at gsnContourLineThicknessesScale = 3.0
geo = gsn_csm_contour(wks, z_plane, res5)


contour = gsn_csm_contour_map(wks,hgt,res)
vector = gsn_csm_vector(wks,u_wind,v_wind,res2)
overlay(contour, geo)
overlay(contour, vector)

plres = True
plres at gsLineColor = "blue"
plres at gsLineThicknessF = 3.0

lat = (/38.05, 38.05/)
lon = (/-120.10, -119.35/)

a = gsn_add_polyline(wks,contour,lon,lat,plres)

pltres = True
pltres at gsLineColor = "Black"
pltres at gsLineThicknessF = 3.0

lat1 = (/38.27, 38.27/)
lon1 = (/-120.10, -119.35/)

b = gsn_add_polyline(wks,contour,lon1,lat1,pltres)

draw(contour)
frame(wks)

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end
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