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 -4.993 -16.38 NOS Major Flood Threshold
NOS Moderate -4.993 -16.38 NOS Moderate Flood Threshold
NOS Minor -4.993 -16.38 NOS Minor Flood Threshold
MHHW 0.0 0.0 Mean Higher-High Water
MHW -0.232 -0.76 Mean High Water
DTL -2.853 -9.36 Mean Diurnal Tide Level
MTL -2.667 -8.75 Mean Tide Level
MSL -2.606 -8.55 Mean Sea Level
MLW -5.102 -16.74 Mean Low Water
MLLW -5.707 -18.72 Mean Lower-Low Water
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