This curve shows a projected increase in mean sea level since 1992 of. To see these effects modeled through NOAA's Sea Level Rise Viewer in Virginia by Sea Level, or to view these Sea Level Scenarios developed by VIMS' CCRM by year, click these URLs to view one of these geospatial flood maps.įurthermore, ocean dynamics attributed to changes in the gulf stream and land subsidence due to groundwater withdrawal and settling of non-terrigenous materials in the Chesapeake Bay impact crater have been shown in a recent VIMS report to have significantly changed the rate of sea level rise since 1969 to reveal a significantly accelerating (non-linear) quadratic curve for recent sea levels in Virginia. This increase has been documented by the Intergovernmental Panel on Climate Change and NOAA, and thus it is important to note that NOAA's tidal harmonic predictor doesn't consider that the sea level is rising due to steric expansion of warming oceans, increases in overall ocean volume due to displacement through glacial ice melt, and weather-driven fluctuations in local sea level. in the past 100 years, and extrapolation of this trend suggests that it will continue to cause sea levels to rise by this much again (at a minimum) by the year 2100! ![]() This represents an increase in eustatic sea level of 1.53 ft. Thus, the 2100 king tide harmonic prediction doesn't seem particularly dramatic because this estimate doesn't account for the 4.66mm/yr average annual increase in sea level NOAA has documented at Sewells Point over the last 90+ years. This prediction method deconstructs the gravitational influences on Earth's oceans by the sun and moon with the assumption that none of these object's orbits are altered. For example, check out this king tide tidal harmonic prediction for Sewells Point, VA, in the year 2100. NOAA's tide prediction charts use harmonic analysis prediction algorithms to estimate impacts of tides months, decades, or even centuries in advance. Select a site on NOAA's map near you to select a site to help map the king tide: Tide predictions for subordinate sites are generated by referencing high/low tide predictions for a nearby designated harmonic site, and then making time and height adjustments to correct the high/low predictions at the subordinate site. Subordinate tidal predictions do not have tidal harmonic constants available. ![]() Tide predictions for Harmonic sites are generated directly from the Harmonic constants and have higher confidence than nearby "Subordinate" sites. Harmonic prediction sites are those with tidal Harmonic constants estimated by models and tidal datums surveyed.NOAA's tide predictions are estimated in 2 categories in 112 areas throughout VA, Harmonic and Subordinate. ![]() Refer to the map and click on the numbered station in the list below that is nearest to you to view the dates and times for the predicted tidal peaks for your area: NOAA maintains 10 tide monitoring stations in VA. Determining the estimated time of the king tide's peak at a location near you is made easy by selecting from one of 10 VA L ong-Term Tide Sensors or one of 112 VA Tidal Harmonic Prediction Sites.Ĭlick on one of the Tide Station Links below to access one of the National Oceanic and Atmospheric Administration's (NOAA) long-range interactive tide prediction charts.
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