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Does heat lightning exist9/18/2023 ![]() ![]() A high-resistance medium must obstruct the free, unimpeded equalisation of the opposite charges.A sufficiently high electric potential between two regions of space must exist It is well understood that during a thunderstorm there is charge separation and aggregation in certain regions of the cloud or cloud to ground however the exact processes by which this occurs are not fully understood.In order for an electrostatic discharge to occur, two things are necessary: Lightning primarily occurs when warm air is mixed with colder air masses, resulting in atmospheric disturbances necessary for polarising the atmosphere. On Earth, the lightning frequency is approximately 40–50 times a second or nearly 1.4 billion flashes per year and the average duration is 30 microseconds. The actual discharge is the final stage of a very complex process. from a cloud to itself (intra-cloud or IC)Īlthough lightning is always accompanied by the sound of thunder, distant lightning may be seen but may be too far away for the thunder to be heard.Ī typical cloud to ground lightning flash culminates in the formation of an electrically conducting plasma channel through the air in excess of 5 kilometres tall, from within the cloud to the ground’s surface.Lightning strike There are three primary types of lightning: Peer-reviewed journal articles by Met Éireann staff members Past Weather Agrometeorological Bulletins ![]()
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