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Re: [TowerTalk] Fwd: Static Discharge Porcupines?

To: towertalk@contesting.com
Subject: Re: [TowerTalk] Fwd: Static Discharge Porcupines?
From: Jim Lux <jimlux@earthlink.net>
Date: Wed, 12 Aug 2015 12:02:11 -0700
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
On 8/12/15 9:04 AM, David Robbins wrote:
"It appears to me that there are no ways to predict where the lightning will strike. 
Yes, you know that it will be somewhere below a the thunder storm passing by but the 
strikes seem to ignore high structures from not that high."

actually no, you don't know that it will be somewhere below the thunderstorm.  
the large positive strokes often reach out quite a distance from the cloud.  
This
is because they normally originate from the top of the cloud and come out 
horizontally then down.  these strokes are where the phrase 'bolt from the 
blue' came from as they can appear to come out of clear blue sky.

__

This phenomenon is a significant cause of the injuries and deaths from lightning in Florida. 15-20km horizontal distance is not unusual.

Hence the guidance: If you see thunderstorms, get out of the water. Visual horizon for 2m above the surface is 5km away.


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