High and Low Water Conditions - NOAA Tides & Currents

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High Water Conditions

What does this mean?

Five or more of the last 10 six-minute readings at a tide gauge are 1.5 feet above the predicted water level.
There may be flooding in the area.

Stations currently in high water condition

Low Water Conditions

What does this mean?

The average of the previous 12 hours of observations were found to be below the elevation of *Low Water Datum (LWD).
Use caution when transiting these areas as depth soundings may be less than those found on the NOAA nautical charts.

*The elevation of LWD is the chart datum of a particular lake or section of a connecting river.

Stations currently in low water condition