SWPT - Sewells Point

James River at Sewells Point in Norfolk, VA

StormSense Past Observations (7 Days/Week)

Click on any data series in the chart legend above or in the datums listing to the right of the plot to hide or show that particular data feature. 
View this plot referenced to NAVD.

Other Intervals

Last 30 days | Last 7 days | 72-hour Forecast

Legend Definitions, Datum, & Data Downloads

Press the arrow next to an icon below or visit the StormSense FAQ page for additional information. 

Legend for water level sensing

Sensor Observation The red line shows the observed water level over the past 7 days.

Predicted Astronomical Tide The blue line shows the StormSense prediction for astronomical tide at this tide gauge. This series represents the expected daily change in water level produced by known gravitational interactions between the Earth, moon, and sun on the amplitude, phase, and frequency of the tides.

Residual The green line is the residual difference between the predicted astronomical tide and the observed water level over the past 7 days. Values are positive when observations exceed predicted tides, and negative when observations fall below predicted tides.

MLLW (Tidal Datum) Observed and predicted water level values are displayed in feet and referenced to the tidal elevation benchmark Mean Lower Low Water (MLLW). This datum represents the water elevations relative to the lower of the two low tides observed daily at this semidiurnal tide monitoring site.

  Download CSV       Download JSON       Download Metadata

Station Details

Station: SWPT Location: James River at Sewells Point in Norfolk, VA Latitude: 36.94667 Longitude: -76.33000 Station #: 8638610 Managed By: NOAA

Disclaimer

The Virginia Institute of Marine Science (VIMS) makes no warranty concerning any of the data displayed on this website (www.vims.edu). Read our Disclaimer and Methods Disclosure statement.