Inundation Analysis Tool


9454751 Guguak, AK

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 -3.427 -11.24 NOS Major Flood Threshold
NOS Moderate -3.427 -11.24 NOS Moderate Flood Threshold
NOS Minor -3.427 -11.24 NOS Minor Flood Threshold
MHHW 0.0 0.0 Mean Higher-High Water
MHW -0.285 -0.94 Mean High Water
DTL -1.764 -5.79 Mean Diurnal Tide Level
MTL -1.686 -5.53 Mean Tide Level
MSL -1.667 -5.47 Mean Sea Level
MLW -3.087 -10.13 Mean Low Water
MLLW -3.527 -11.57 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