GEMPAK Manual |
Programs | Parameters
WIND
WIND specifies the wind symbol, size, width, type, and head size
separated by slashes:
wind symbol / size / width / type / arrow head size
The wind symbol contains a letter for symbol type, a letter for symbol
units and a color number with no separators. The character meanings
are:
TYPE: B = BARB A = ARROW D = DIRECTIONAL ARROW
UNITS: K = KNOTS M = m/s
COLOR: Color number 0 = no wind plotted
The default is BM1, i.e., barbs in meters/sec plotted in color number
1. If a partial specification is given, the remaining characteristics
will be taken from the default.
The wind size is a real number which will be used as a multiplier for
the default wind symbol size. If this number is negative, zero, or
missing, the current size will be used. The sizes for barbs and
arrows are independent.
The width is an integer specifying the line width to use in drawing
the arrows or barbs.
The type is a four-digit number, FABC, interpreted digit by digit as
follows:
A B C
1 = plot calm wind 1 = start at stn 1 = not filled
2 = ignore calm wind 2 = center at stn 2 = filled
3 = start on sky symbol 3 = not filled with box
4 = filled with box
F is a flag which specifies whether to plot the wind barb on the
opposite side from where it would normally occur. If, F is not
equal to zero, the wind barb is flipped.
Calm winds are plotted as a circle or an arrowhead for barbs and
arrows, respectively. Arrowheads and 50-unit barb flags are filled
if C=2 or 4. A box is plotted with background color if C = 3 or 4.
For example, if TYPE=132, a barb will be plotted as a circle if the
wind is calm; it will begin on the edge of the cloud cover symbol,
and 50-unit flags will be filled. The default is 111.
The head size is a real valued multiplier used for the length of the
arrow head. This variable is not used for wind barbs.