Inundation Analysis Tool


9451438 Entrance 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 1929-04-16 00:00:00 and 2006-06-08 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 -0.261 -0.86 Mean High Water
DTL -2.219 -7.28 Mean Diurnal Tide Level
MTL -2.115 -6.94 Mean Tide Level
MSL -2.106 -6.91 Mean Sea Level
MLW -3.968 -13.02 Mean Low Water
MLLW -4.438 -14.56 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