Coastal A Zone 2
Coastal A Zone 2 : For the purposes of this manual, the portion of the Special Flood Hazard Area landward of a V zone or landward of an open coast without mapped V zones (e.g., shorelines of the Great Lakes), in which the principal sources of flooding are astronomical tides, storm surge, seiches, or tsunamis, not riverine sources. The flood forces in coastal A zones are highly correlated with coastal winds or coastal seismic activity. Coastal A zones may therefore be subject to wave effects, velocity flows, erosion, scour, or combinations of these forces. See: A zone and Non-coastal A zone. (Note: the National Flood Insurance Program regulations do not differentiate between coastal A zones and non-coastal A zones.)
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