thunder (version 1.1.4)

sounding_hodograph: Plot hodograph based on rawinsonde data

Description

Plot hodograph to show changes in wind speed and wind direction with height

Usage

sounding_hodograph(
  ws,
  wd,
  altitude,
  max_hght = 12000,
  max_speed = 25,
  lab_hghts = c(0, 1, 3, 6, 9, 12),
  close_par = TRUE,
  SRH_polygon = "03km_RM",
  storm_motion = c(999, 999),
  ...
)

Value

hodograph plot

Arguments

ws

wind speed [knots]

wd

wind direction [azimuth in degrees]

altitude

altitude [m] (can be above sea level or above ground level as function always consider first level as surface, i.e h = 0 m) altitude [m]

max_hght

maximum altitude [km] to be considered on the hodograph, 12 km used by default

max_speed

displayed range of the drawn hodograph [m/s], 25 m/s used as default

lab_hghts

height labels [km] to be drawn on the hodograph, 0, 1, 3, 6, 9, 12 used by default; NULL for skipping labels

close_par

if plot will be modified in next steps storing par settings is needed. This logical argument is turned on by default. If you want to modify Skew-T plot in next step set it to FALSE

SRH_polygon

draws polygon for storm-relative helicity, available options are "0500m", "01km", "03km", "36km", "none", "03km" used as default

storm_motion

(optional) for moving storms only - one can define wind speed [m/s] and wind directions [degrees] that will be used to compute adjusted SRH parameters

...

other graphical parameters to be used with plot() function

Examples

#northplatte = get_sounding(wmo_id = 72562, yy = 1999, mm = 7, dd = 3, hh = 0)
data("northplatte") 
sounding_hodograph(
  ws = northplatte$ws, wd = northplatte$wd,
  altitude = northplatte$altitude, max_speed = 40
)
title("North Platte - 3 July 1999, 00:00 UTC")