The Extratropical Surge and Tide Operational Forecast System (ESTOFS)

The Extratropical Surge and Tide Operational Forecast System (ESTOFS) is a storm surge model results viewer built by a collaboration between the National Oceanic and Atmospheric Administration (NOAA) and NOAA's National Ocean Service's Coast Survey Development Lab (CSDL) to provide estimations of coastal storm surge for the U.S. Atlantic and Pacific coastlines, as well as Hawaii and Alaska. The underlying ADCIRC model is run externally and results are displayed in ESTOFS as web-based graphics. The ESTOFS viewer includes the effects of harmonic tide, subtidal water level and combined surge and tide.

Model Information
For more information about this model, go to
Spatial Resolution
The modelled area is discretized into 2.5 km grid cells.
Temporal Resolution
The model output is 7-day forecasts, provided 4 times per day and the output data is reported hourly.
Model outputs include water level and storm surge predictions, and gage data is generated in 6-minute increments.
Intended User
practitioner, decision maker
Model Type
risk communication
Inclusion of Climate Change
Model is intended for short term forecasting only (i.e., 7 days).
Geographic Region
Data Requirements
all data sets built in
Source Code Availability
closed source
Computational Burden
Scenario Modeling
not applicable
Coding Language
Operating System
not applicable
Mathematical Approach
spatial analysis
Maintenance Plan
Date of Last Known Update
User Manual
Documentation link not available