Inundation Analysis Tool


9454564 SEAL ISLAND, AK

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

Note that this is a historical station and data may be available between 1998-08-12 00:00:00 and 1998-10-30 23:59:00


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
MHHW 0.0 0.0 Mean Higher-High Water
MHW -0.275 -0.9 Mean High Water
DTL -1.796 -5.89 Mean Diurnal Tide Level
MTL -1.708 -5.6 Mean Tide Level
MSL -1.67 -5.48 Mean Sea Level
MLW -3.141 -10.31 Mean Low Water
MLLW -3.592 -11.78 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