Mean low water

{
  "id": "MLC-T-MET-001666",
  "term": "Mean low water",
  "field": "Meteorology and atmospheric science",
  "definitions": [
    "The average height of all low tides observed over a specific period, typically 19 years, which constitutes a full tidal epoch. This tidal datum is used for charting and for defining the boundary between land and water in coastal areas. It represents a long-term average, smoothing out daily and seasonal variations.",
    "(MLW) - A tidal datum. The average of all the low water heights observed over the National Tidal Datum Epoch. For stations with shorter series, simultaneous observational comparisons are made with a control tide station in order to derive the equivalent datum of the National Tidal Datum Epoch."
  ],
  "references": [
    "NWS Glossary"
  ],
  "url": "https://mlchart.com/terminology/meteorology/mean-low-water/"
}