A hypothetical water level
(exclusive of wave
runup from normal wind-generated
waves)
that might result
from the most severe combination of hydrometeorological, geoseismic and
other geophysical factors that is considered
reasonably possible in the region involved, with each of these
factors considered as affecting the
locality in a maximum manner. This
level represents the physical
response of a body of water to maximum
applied phenomena such as hurricanes, moving
squall lines, other cyclonic
meteorological events, tsunamis, and astronomical tide combined with
maximum probable ambient hydrological conditions such as wave
level with virtually no risk of being exceeded.