I knew about significant water level changes, due to the tides, out at the mouth of the Merrimack River, Massachusetts, but didn’t realize that they were so effective when miles inland. So when I heard that the water levels in Haverhill would be low, I had to take a drive out to the river to see what it would be like.
So here I am, after I walked out into the middle of the river! GPS clearly shows how far I walked out.
I just looked at the NOAA (National Oceanic and Atmospheric Administration) Tides and Current pages for Newburyport, MA, Merrimack River, Station ID: 8440466
This graph shows the significant differences between the river level at high and low tide, where the Merrimack meets the Atlantic Ocean, in Newburyport.
So now I am looking here, likely close to where I was standing in Haverhill, Riverside, Merrimack River, – Station ID: 8440889
This graph shows the differences between the river level at high and low tide, further upriver, in Haverhill, MA.
This brings up the question, how are the tides created? Check out our resource, the origin of tides.