Boltek Lightning/2000 - Manual (Page 96)

L I G H T N I N G / 2 0 0 0
96 96 96 96
Negative CG Stroke Rate Counter
The –CG stroke rate counter, shown with and without an alert bar.
Default yellow alert trigger level: 10
Default red alert trigger level: 50
Record kept: Yes
The negative CG stroke rate counter shows the
number of -CG (negative cloud-to-ground) strokes
that have been detected in the last minute.
CG strokes can be detected from storms at any
range, and have been detected over 600 miles (1000
km) away.
-CG strokes are the most common type of CG stroke.
A new record value is denoted by swapping the colors
of the counter and its background.
This counter is not used with the LD-250.
The Stroke Rate Change Counters
The default configuration does not display the stroke subtype
rate change counters. If you want to view these counters,
resize the Rates window by dragging its bottom edge
downward. You may need to make the stroke subtype rate
change counters visible by selecting them on the Counters
menu. Make them visible by choosing the counter on the
Counters | Percent changes menu.
These counters, though little used by most, can be used to
glean information about how a storm is behaving, particularly
if the stroke rates are high enough. The decision to make