Inundation Analysis Tool


8518643 Randalls Island, NY

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 1981-04-30 00:00:00 and 2014-08-10 00:00:00


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 -0.093 -0.31 Mean High Water
DTL -0.769 -2.52 Mean Diurnal Tide Level
MTL -0.788 -2.59 Mean Tide Level
MSL -0.778 -2.55 Mean Sea Level
MLW -1.482 -4.86 Mean Low Water
MLLW -1.537 -5.04 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