Please do the math for me
 

Looking to see how much in inches the lake has dropped since August 22. I used to look at Bizer’s chart but forgot the formula to calculate.

Thanks
IG

According to the state data here: https://www.des.nh.gov/sites/g/files...-chart2025.pdf

the lake level has gone down 1.68 inches since the 22nd.

Hmmm looks like more
 

Just in the last couple of days.

As of this morning, August 29th @ 6 am, the lake is 7.68 inches lower than the mean for this time of year.