David Robbins wrote:
you get .03 strokes to the ground in that 300' circle per year... now
obviously you don't get .03 strokes per year, so invert that and you
should expect one stroke to that tower every 33 years.

It's more correct - and actually makes a lot more sense - to call it "a
1 in 33 chance of a lightning stroke in any given year."


--
73 from Ian G3SEK 'In Practice' columnist for RadCom (RSGB)
Editor, 'The VHF/UHF DX Book'
http://www.ifwtech.co.uk/g3sek