Boltek Lightning/2000 - Manual (Page 218)

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specified. This particular alarm is a good gross indicator of
how a storm is varying in intensity minute by minute (and
even second by second for a rapidly strengthening or
weakening storm). The stroke rate history window provides a
visual history of the short-term changes in the total lightning
activity.
The energy ratio alert is triggered when the energy ratio rises
above the trigger level. This alarm usually provides a good
indication of whether a storm is very close or not. Many
times the first indication of a developing nearby storm will be
the energy ratio counter alarm.
The storm range alert gets triggered when the Analysis
window detects an area of lightning activity that exhibits
characteristics that identify it as being close enough to be of
potential concern.
The general alert is triggered when one or more conditions
based on the other alerts occur that warrants your attention.
The yellow general alert means that you should check the local
radar or other source of weather information at your earliest
convenience. The red general alert means that you should
check other sources of weather information immediately.
The stroke subtype percent alerts (IC%, -IC%, +CG%) are
useful indicators of a storm’s severity. When the percentage
of IC strokes becomes excessive, it is a certain indicator that a
storm is close. When the percentage of –IC and/or +CG
strokes rises, it is an indication of potential severity in a storm.
Energy
Each new stroke is rated for energy based on the gross
characteristics of the detected waveform. The energy is scaled
such that the average energy for a stroke is 1. More nearby