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Exceedance Probability Levels and Tidal Datums
Annual exceedance probability levels, displayed in meters or feet, relative to tidal datums
and the geodetic North American Vertical Datum (NAVD88), if available. On the left, exceedance probability levels for the mid-year of the
National Tidal Datum Epoch
(1983-2001) Mean Sea Level (MSL) datum, currently in effect at most stations, are displayed. For stations with rapid sea level rates,
such as those in Louisiana, Texas, and Alaska, a 5-year modified epoch MSL datum is used. On the right, projected exceedance probability
levels and tidal datums, assuming continuation of the historical linear trend, are displayed. See the Annual Exceedance Probability tab
for 95% confidence intervals for each of the exceedance probability levels shown here.
Products available at 8545240 Philadelphia, PA
- Meteorological/Other
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- PORTS® product page for Philadelphia
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- Information
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