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Tidal water level changes in the Merrimack River

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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.

Haverhill River low tide 10 7 2019

So here I am, after I walked out into the middle of the river! GPS clearly shows how far I walked out.

Haverhill River on GPS low tide

I just looked at the NOAA (National Oceanic and Atmospheric Administration) Tides and Current pages for Newburyport, MA, Merrimack River, Station ID: 8440466

tidesandcurrents.noaa.gov, 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.

Merrimack River Entrance Massachusetts Tide Chart

So now I am looking here, likely close to where I was standing in Haverhill, Riverside, Merrimack River, – Station ID: 8440889

tidesandcurrents.noaa.gov, 8440889

This graph shows the differences between the river level at high and low tide, further upriver, in Haverhill, MA.

Merrimacport, Merrimack River, Haverhill MA Tides

This brings up the question, how are the tides created? Check out our resource, the origin of tides.

GIF Tides lighthouse

Beach in the UK

 

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