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 MLLW.

Other Intervals

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

Legend Definitions, Datum, & Data Downloads

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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 cyan line is the residual difference between the predicted astronomical tide and the observed water level. Values are positive when observed values exceed predicted values, and negative when observed values fall below predicted values.

NAVD (Geodetic Datum) Observed and predicted water-level values are displayed in feet and referenced to the elevation benchmark North American Vertical Datum of 1988 (NAVD88). This is the datum in which house and roadway elevations are typically referenced. Critical flood thresholds determined by the US National Weather Service are also noted in yellow for Action level, Minor level in orange, Moderate level in red, and Major in magenta.

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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.