[ncl-talk] highs and lows font colors

[Mary Haley]

Hello,

The wrf_contour routine apparently is setting the high/low label font
colors internally, to whatever color the contour lines are drawn in.

I created a ticket (NCL-2745) to improve/fix this in 6.5.0 (which is
already done because it was an easy fix).

Meanwhile, I
​'ve included the fix
 in the attached "wrf_contour_labels_fix.ncl" script.

If you want to try it, simply load this script from your own script, after
any other "load" commands. For example:

load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"
load "$NCARG_ROOT/lib/ncarg/nclscripts/wrf/WRFUserARW.ncl"
​l​
oad "./wrf_contour_labels_fix.ncl"

​--Mary
​


​

On Fri, Apr 13, 2018 at 6:06 PM, Juan Carlos Anduckia <janducki at yahoo.com>
wrote:

> Hello again:
>
> Still a very basic question. I'm trying to plot high and low-pressure
> centers in blue and red, respectively, by using cnHighLabelFontColor, but I
> don't see any effect at all. Am I using this resource in the wrong way?
> .
> This is the pertinent part of the code:
>
>     ; Plotting options for SLP shades
>        opts = res
>        opts at cnFillOn = True
>     ;  opts at cnFillColors = "BlueWhite"
>     ;  opts at cnFillPalette = "BlueWhite"
>        opts at FieldTitle= " "
>     ;  opts at ContourParameters = (/900.,1050.,2./)
>        opts at gsnSpreadColorEnd = -3
>        gsn_define_colormap(wks,"WhiteBlue")
>        contour_psl1 = wrf_contour(e1,wks,slp,opts)
>        delete(opts)
>     ; Plotting options for SLP Contours
>        opts = res
>        opts at cnLineColor = "Grey25"
>        opts at cnHighLabelsOn = True
>        opts at cnHighLabelPerimOn = False
>        opts at cnHighLabelFontColor = "Blue"
>        opts at cnLowLabelsOn = True
>        opts at cnLowLabelFontColor = "Red"
>        opts at FieldTitle = " "
>     ;  opts at ContourParameters = (/ 900., 1050., 2. /)
>        opts at cnLineLabelBackgroundColor = -1
>        opts at gsnContourLineThicknessesScale = 1.0
>        contour_psl2 = wrf_contour(e1,wks,slp,opts)
>        delete(opts)
>
>      ; MAKE PLOTS
>        plot = wrf_map_overlays(e1,wks,(/contour_psl1,contour_psl2/),
> pltres,mpres)
>
> Thank you.
>
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