100 Year Flood Maps

100 Year Flood Maps. Any place with a 1% chance or higher chance of experiencing a flood each year is considered to have a high risk Last Modified: July 5, 2023 (0 ratings, 0 comments, 11,951 views)


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Those areas have at least a one-in-four chance of flooding during a 30-year mortgage. Explore geographic data with this interactive ArcGIS web application.

FEMA is the official public source for flood maps for insurance purposes:FEMA's Flood Map Service CenterFEMA's National Flood Hazard LayerNOAA is responsible for producing flood forecast maps that combine precipitation data with USGS streamflow data:NWS - National Water Prediction Service: River forecasts and long range flood outlookCoastal Inundation Dashboard: Real-time and historical. If you are close to the 100-year flood, your risk may not have been significantly reduced The 100-year flood is referred to as the 1% annual exceedance probability flood, since it is a flood that has a 1% chance of being equaled or exceeded in any single year.

. from 100-year flood, or shallow flooding areas with average depths of less than one foot or drainage areas less than 1 square mile Flood maps show how likely it is for an area to flood

. Those areas have at least a one-in-four chance of flooding during a 30-year mortgage. Explore geographic data with this interactive ArcGIS web application.