September 8, 2007

• Tides Online --
  NOAA

  Finding tidal information has been kind of
  difficult.  It's a whole 'nother language.

  
  Snapshot from http://tidesonline.nos.noaa.gov/geographic.html

  For
  example, I love this definition of
  MLLW:

  
  

  MLLW -- Mean Lower Low Water There are two low tides in each tidal cycle (so usually two low tides in each day). These two low tides are not quite the same height because one tide is generated by the gravitational interaction with the sun (which is small), and the other is generated by the gravitational interaction with the moon (which is not so small). Since the two low tides (or water levels) are different levels of low, one is naturally the higher low water (higher low tide) and the other is the lower low water (lower low tide). So Mean Lower Low Water is the average of the lower low water height of each tidal day (ie average of the lowest low tide from each day). The averages are taken over a period called the National Tidal Datum Epoch (a 19-year epoch). from http://sfports.wr.usgs.gov/SFPORTS/glossary.html

  
  I
  tried reading this paragraph out loud to Matt, and it's a tongue
  twister in the middle, there.

  Anyway, tidal
  information can be found at Tides
  Online, run by NOAA, or at the main site which is Tides and
  Currents.

  
  http://tidesonline.nos.noaa.gov/

  
  http://tidesandcurrents.noaa.gov/

  • 2:59 pm
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