On Wed Jun-10-2015 13:18, mark lewis (1:3634/12.73) wrote to Holger Granholm:


 ml> 09 Jun 15 09:24, you wrote to me:

 HG> In a message dated 06-08-15, mark lewis said to Holger Granholm:

 HG> Hi Mark,

 ml>> here we use a 4 second rule...

 ml>> 1. see lightening flash
 ml>> 2. start counting - 1onethousand, 2onethousand, 3onethousand, etc
 ml>> 3. stop counting when the thunder is heard
 ml>> 4. divide the count by four and that's how many miles away the
 ml>> strike was

 ml>> dunno how favorably that compares with sound and 3 seconds per
 ml>> kilometer...

 HG> Since the speed of sound is 360 m/s, 4 seconds will show that the strike
 HG> was about 1.44 km away

 ml> ahhh... so maybe it should be a 5 second count then... i always got
 ml> mixed up and settled on 4 seconds... it is only an estimate,
 ml> anyway... one might count their "one one thousands" too fast or too
 ml> slow...

When I was a child, we were taught to count the seconds between the strike
and the thunder.  I got pretty good at it, but it was easier for me to
count backwards than forwards.  That way I knew I was within a millisecond
of the actual strike.  It's when counting those seconds forward and you
don't get to 2, I worry about.  We had one a few days ago that was very
close, but didn't even make my UPS yell "Uncle", but scared the
bejesus out of my daughter's cat and me.  I didn't get to count.  (-:


Regards,

Roger 
--- timEd/386 1.10.y2k+