Graphics: NCL – Example

Below is a series of plots illustrating how one might go about generating meteograms from wrfout data.

	wrf_meteo_1.ncl A very basic plot where T2 at a point is plotted against time, with the function gsn_csm_xy
	wrf_meteo_2.ncl In this plot we extract some time information from the file to use on the X-axis t2_res@tmXBMode = "Explicit" t2_res@tmXBValues = taus t2_res@tmXBLabels = times We also change the line color to Blue.
	wrf_meteo_3.ncl Plot both T2 and Sea Level Pressure for this point. In order to do this, we need to specify the locations of the two plots explicitly. res@vpWidthF = 0.70 res@vpHeightF = 0.20 res@vpXF = 0.15 slp_res = res slp_res@vpYF = 0.75 t2_res = res t2_res@vpYF = 0.45
	wrf_meteo_4.ncl Get a vertical profile of T and wind and this point. Note, we use the named dimensions to swap the arrays so that we can plot Time on the X-axis (in NCL right-most dimension is always plotted on the x-axis). tt = tc_point(bottom_top|:,Time|:) ugrid = u_point(bottom_top|:,Time|:) vgrid = v_point(bottom_top|:,Time|:) To generate this plot, we use gsn_contour and gsn_vector and then overlay then before drawing.
	wrf_meteo_5.ncl Now we create a nice and clean plot:    Add a header with tiMainString    Manually set the contour levels with tiMainString, cnMinLevelValF, cnMaxLevelValF and cnLevelSpacingF    Add a label bar in place of the contour information.