2. To change the tightness of the spiral line, use the Angle widget, and increment the
angle up and down from 5 to 20°.
This is the angle in degrees that the logarithmic spiral makes to a circle. A smaller
number makes a tighter spiral.
a. Set the direction of cyclonic motion at your location to CW or CCW using the Rotate
option.
b. Set the minimum and maximum displayed range of the spiral using the Range type
in fields.
6.15
Forecast Tool
Use the Forecast Tool to shift products into the future to see the forecast position of
weather features.
In the following example, the dark outer region represents the area not scanned, while the
inner lighter circle represents the scanned area. The radar image is shifted 3 hours for an
assumed motion of 24 knots at 43°.
Chapter 6 – Quick Look Window
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