Tidal differences

[Alaskan Sea-Duction]

For those in the Northeast, I found it interesting on my one and only trip on the Hudson river (hoping not my last), the Atlantic tides reach all the way up the Hudson to Albany and farther. That's like 100 miles up river and affecting the current and water levels. Never would have expected that. I see it all the time near the mouths of rivers feeding Long Island Sound where the river currents are reversed as the tides come in, but never thought about or realized how far inland that can go.

Same for the Columbia River.

 

[kabyak]

A great read on the subject is "Tides", by Jonathan White. He goes into depth with the science of tides and the oddities around the world due to geography.