Notice: CO-OPS recently determined that water level data from Wauna (9439099) contained an error due to the conversion of pressure to water level in our database. This error resulted in water level measurements several centimeters higher than actual. Impacted water level products from January 1, 2010 to July 9, 2021 have now been corrected, including 6-minute water level data, hourly heights, highs/lows, monthly means, and tidal datums. Water level products from March 27, 2002 to December 31, 2009 were unable to be corrected completely. Instead, a mean-value corrector was applied to the preliminary 6-minute data to account for this error and this is the only data available on our website. Other water level products for this time frame are available upon request. Water level products from July 9, 2021 to present, including real-time data, were not impacted. If you have any questions, please send an email to Tide.Predictions.gov and we will get back to you as soon as possible.

Datums for 9439099, Wauna OR

NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 9439099, Wauna, OR
Status: Accepted (Dec 22 2023)
Units: Feet
Control Station: 9439040 Astoria, OR
T.M.: 0
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW6.81Mean Higher-High Water
MHW6.22Mean High Water
MTL3.43Mean Tide Level
MSL3.30Mean Sea Level
DTL3.41Mean Diurnal Tide Level
MLW0.64Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
CRD_OFFSET-1.15Columbia River Datum Offset
STND-1.01Station Datum
GT6.81Great Diurnal Range
MN5.58Mean Range of Tide
DHQ0.59Mean Diurnal High Water Inequality
DLQ0.64Mean Diurnal Low Water Inequality
HWI10.26Greenwich High Water Interval (in hours)
LWI4.83Greenwich Low Water Interval (in hours)
Max Tide11.20Highest Observed Tide
Max Tide Date & Time12/11/2015 01:54Highest Observed Tide Date & Time
Min Tide-1.80Lowest Observed Tide
Min Tide Date & Time09/06/2010 19:30Lowest Observed Tide Date & Time
HAT8.67Highest Astronomical Tide
HAT Date & Time12/15/2039 21:18HAT Date and Time
LAT-1.67Lowest Astronomical Tide
LAT Date & Time07/31/2000 17:36LAT Date and Time
Tidal Datum Analysis Periods
07/01/2010 - 10/31/2010
08/01/2011 - 10/31/2011
09/01/2012 - 10/31/2012
07/01/2013 - 12/31/2013
08/01/2014 - 09/30/2014
06/01/2015 - 09/30/2015


Products available at 9439099 Wauna, OR