These areas are not subject to high velocity wave action but are still considered high risk flooding areas.Īdvisory Limit of the 1% Annual Chance Flood Hazard Area Zone V areas are exposed to a higher level of risk than other flood zones.Īdvisory Zone A is comprised of the area subject to storm surge flooding from the 1% annual chance coastal flood. The Advisory 1% annual chance floodplain includes both A and V Advisory flood hazard zones:Īdvisory Zone V is the area subject to high velocity wave action (a 3-foot breaking wave) from the 1% annual chance coastal flood. Advisory Shaded Zone X is an area of moderate coastal flood risk outside of Advisory Flood Hazard Zones V and A up to the 0.2% annual chance flood level.These areas are not subject to high velocity wave action but are still considered high risk flooding areas. Advisory Zone A is the area subject to storm surge flooding from the 1% annual chance coastal flood.Zone V is subject to more stringent building requirements than other zones because these areas are exposed to a higher level of risk. Advisory Zone V is the area subject to high velocity wave action (a 3-foot breaking wave) from the 1% annual chance coastal flood.Indicates the Advisory flood hazard zone associated with the location: It is expressed in feet referenced to the North American Vertical Datum of 1988 (NAVD88).Īdvisory Base Flood Elevation (ABFE) ZonesĪ map layer which indicates whether an area is designated as a V or A flood hazard zone and which provides the 0.2% Advisory Flood Elevation and the 1% Advisory Base Flood Elevation (ABFE) in feet referenced to the North American Vertical Datum of 1988 (NAV88) for the zone. The coastal water surface elevation of a flood having a 0.2% annual chance of being equaled or exceeded in any given year. Information about how the Advisory information was developed is available in the New York/New Jersey Coastal Advisory Flood Hazard Information Development Report.Īdvisory 0.2% Annual Chance Flood Elevation For most communities, ABFE information has now been replaced by preliminary Flood Insurance Rate Maps as the most recent flood hazard data available from FEMA. It is expressed in feet referenced to the North American Vertical Datum of 1988 (NAVD88) and can reflect the elevation of an Advisory Flood Zone V or A.įEMA created Advisory Base Flood Elevation (ABFE) maps to show a more current picture of flood risk for coastal New Jersey and New York communities after Hurricane Sandy. The coastal water surface elevation of a flood having a 1% annual chance of being equaled or exceeded in any given year. For detailed information on the ADCIRC model, visit the ADCIRC website.Īdvisory Base (1% Annual Chance) Flood Elevation

A ADCIRC (ADvanced CIRCulation) ModelĪ computer model used for modeling coastal storm surge which results in the generation of stillwater elevations associated with storm events. Residents should know and respect this flood loss potential and be prepared to deal with this hazard accordingly.A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | ZĪn alphabetical list of defined key terms used on this website is provided on this page. The potential for flood losses in Seminole County always exists. In recent years, Seminole County has experienced storms and hurricanes. These maps designate areas of 100-year flood and base flood elevations.

Due to this threat, the Federal Emergency Management Agency (FEMA) has identified portions of the county as a Special Flood Hazard Area (SFHA) on the Flood Insurance Rate Map (FIRM). Because of Seminole County's location on a peninsula between the Gulf of Mexico and the Atlantic Ocean, and because of its low lying areas, there is always a flood threat from heavy storms. Tropical storms and hurricanes can cause flooding, not just along a coastline but far inland as well. Flooding in Seminole County is caused by heavy rainfall that occurs in short periods of time, as is common during seasonal thunderstorms and storm surges that accompany tropical storms and hurricanes. Flooding is an act of nature which respects no boundary lines, either community or personal.

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