Oops I forgot to calculate the delay between storms. the delay between storms is on average every 3.775 days, storms last on average 0.75 days, this means there is a storm 20% of the time rounded. I on average spend 5% of my time in boats. Also on average there is a 1/100000 chance of lightning striking per tick per chunk (another error I found I made). 20 ticks per second assuming the server has no lag. you automatically get hit if your within 3 blocks of where the lightning strikes. (1/100000/5/(16*16))*3*3*20*60*60=0.0050625 So a 0.0050625% chance of this happening per hour
Forgot to calculate storm chance and time. Also reread lightning mechanic and found a error I made, to fix some calculations. 0.0050625% chance of this happening per hour.