These are mostly courtesy NOAA Tides and Currents. By way of explanation/reminder:
• The blue line is the expected, “normal” water level, as the tides come in and out. Basically, it’s what the tides would be without Isaac.
• The red line is the actual observed water level. When you see the red line not declining, or only declining slightly, while the blue line is going way down, that’s bad news. It means the storm surge is preventing the tide from going out, so the next high tide will likely be much higher (assuming the surge is still present when the tide comes in).
• The green line is the “residual” level, i.e., the difference between the red and blue lines. Basically, the green line is the storm surge. So, for instance, if the red line is declining as the tide goes out, but not as much as it “should” be declining (as in the scenario just discussed), that will cause the green line to go up.
Windmill Point, VA (in Chesapeake Bay)
Lewes, DE (south side, mouth of Delaware Bay)
Brandywine Shoal Light, DE (middle of Delaware Bay)
Cape May, NJ (north side, mouth of Delaware Bay)
Sandy Hook, NJ (mouth of New York Harbor)
Bergen Point, NY (north shore of Staten Island)
The Battery, NY (Lower Manhattan)
[NOTE: If the above graphic isn't working, try this view of The Battery data.]
Kings Point, NY (north shore of western Long Island)
Inwood, NY (south shore of Long Island)
Freeport, NY (south shore of Long Island)
Lindenhurst, NY (south shore of Long Island)
Bridgeport, CT (on Long Island Sound)
New Haven, CT (on Long Island Sound)
New London, CT (on Long Island Sound)
Montauk, NY (north side, facing Long Island Sound)
Additional tidal gauges in Delaware Bay / Delaware River: