Inundation Analysis Tool


Please see the data inventory to find a period with hourly or six-minute data available.
Data Inventory

Select a reference elevation and specify a date range for analysis.

You may select from an accepted tidal datum or specify a different elevation.
Most elevations on land are given relative to a geodetic datum such as NAVD88

All analysis results are presently provided in meters relative to the requested threshold.

Meters relative to MHHWFeet relative to MHHWDatum
NOS Major -0.083 -0.27 NOS Major Flood Threshold
NOS Moderate -0.083 -0.27 NOS Moderate Flood Threshold
NOS Minor -0.083 -0.27 NOS Minor Flood Threshold
MHHW 0.0 0.0 Mean Higher-High Water
MHW -0.025 -0.08 Mean High Water
DTL -0.121 -0.4 Mean Diurnal Tide Level
MTL -0.113 -0.37 Mean Tide Level
MSL -0.114 -0.37 Mean Sea Level
MLW -0.202 -0.66 Mean Low Water
MLLW -0.243 -0.8 Mean Lower-Low Water
NAVD88 -0.089 -0.29 North American Vertical Datum
User Specified Elevation         in       relative to   

Note: Data query is limited to a 10 year maximum and 1 month minimum date range when requesting an analysis of 6-minute data

6-minute Height and High Water Analysis
Hourly Height and High Water Analysis
Hourly Height Analysis