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Tsunami Warning Center Water Level Data Extract Service

High-resolution water level data collected by the Tsunami Warning Centers are available via GET requests to URLS like:<station_id>

Station ID List:

  • 9411166: Ventura, CA
  • 9450552: Craig, AK
  • 9454759: Esther Passage, AK
  • 9454779: Barry Arm North Shore, AK
  • 9454793: Barry Arm Point Doran, AK
  • 9454958: Whittier, AK
  • 9457526: Old Harbor, AK
  • 9458912: Chignik, AK
  • 9460261: Shemya, AK
  • 9460901: Amchitka, AK
  • 9462693: Akutan, AK

Request Parameters:

  • start
    • Starting time bound in ISO-8601 date format (YYYY-MM-DDTHH:mm:ssZ)
    • At least a date is required
    • Alternatively, use startdate and starttime
  • end
    • Ending time bound in ISO-8601 date format (YYYY-MM-DDTHH:mm:ssZ)
    • Defaults to one week after start, if not provided.
    • Alternatively, use enddate and endtime
  • resolution
    • Data down-sampling resolution: full (no averaging), minute, hour, day, month, or year
  • format
    • Data format: json, xml, or csml (default)
    • The response to the GET request is always UTC timestamps and water level relative to station datum in units of centimeters.


Real Time Data & Operators: