Louisiana FloodMaps Portal
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The legend on this state index distinguishes parishes by one of two criteria:
Flood maps on this site are displayed over Bing maps. The LSU AgCenter FloodMaps system is unique in that it integrates flood risk information with ground elevation data (provided by a service of the US Geological Survey) and basic wind speed (derived from the 2003 International Residential Code and produced as a service by the LSU AgCenter). Basic Wind Speed Interactive Map. Effective January 1, 2013, Louisiana replaced the 2003 IRC Basic Wind Speed map with the 2012 IRC Basic Wind Speed map as the wind-speed design criteria for one-to-four family dwellings. Even though the 2006 IRC lowered the threshold to 100 mph for leaving the basic code and requiring site-specific wind engineering (or use of accepted high-wind engineering guides), Louisiana still retains110 mph as that threshold.Official Flood Insurance Rate Maps (FIRMs) can be found for all parishes at the FEMA Map Service Center (MSC) web site. FEMA's MSC Web site is the official source of FIRMettes that can be used for flood insurance and floodplain management purposes.