Boltek Lightning/2000 - Manual (Page 122)

L I G H T N I N G / 2 0 0 0
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polarity. The majority of CG strokes from a typical
storm are -CG strokes.
A sudden change in the -CG stroke rate (or flash rate,
when in flash mode) may indicate unusual storm
activity.
Counters | Percent changes | IC strokes ±%
Toggle the display of the IC ±% counter. IC strokes
are intercloud or intracloud strokes.
A sudden change in the IC stroke rate (or flash rate,
when in flash mode) may indicate unusual storm
activity.
Counters | Percent changes | +IC strokes
±%
Toggle the display of the +IC ±% counter. +IC strokes
are intercloud or intracloud strokes with positive
polarity. The majority of IC strokes in a typical storm
are +IC strokes.
A sudden change in the +IC stroke (or flash rate,
when in flash mode) rate may indicate unusual storm
activity.
Counters | Percent changes | -IC strokes ±%
Toggle the display of the -IC ±% counter. -IC strokes
are intercloud or intracloud strokes with negative
polarity. Normally only a small fraction of IC strokes
are negative strokes. An unusually high percentage
of negative IC strokes (or flashes, when in flash
mode) is usually an indication of a severe storm.
A sudden change in the -IC stroke rate may indicate
unusual storm activity.