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    • Coastal Ocean Reanalysis (CORA)

    Metadata Updated: September 30, 2025

    NOAA's Coastal Ocean Reanalysis (CORA) couples long-term water level observations with hydrodynamic modeling to create historical information between tide stations to bridge gaps in service and serve the Nation's coastal communities effectively and accurately. CORA water levels are simulated with ADvanced CIRCulation (ADCIRC) for ocean circulation modeling and coupled with a phase-averaging model called Simulating WAves Nearshore (SWAN) to produce surface gravity wave spectra and account for time-averaged wave contributions. Coastal water level observations from NOAA's Center for Operational Oceanographic Products and Services (CO-OPS) National Water Level Observation Network (NWLON) are low-pass filtered and assimilated into the model to account for long-term sea level variability and to reduce model errors, and validate results. The domain of this reanalysis spans the Gulf, Atlantic (East), and Caribbean coastlines (or CORA-GEC).

    The reanalysis (1979-2022) was performed through the partnership of NOAA National Ocean Service (NOS) and University of North Carolina's (UNC) Institute of Marine Sciences and Renaissance Computing Institute (RENCI). Validation of CORA-GEC water levels compared to tide gauge observations was conducted in collaboration with the University of Hawaii Sea Level Center (UHSLC). This modeled dataset, also provides hourly water levels for unstructured grid nodes along state shorelines and in 500m structured grids. Secondary derived datasets including daily maximums (daily maxes), monthly statistics, and peak over thresholds are included for the structured 500m grids. Tidal datums, extreme water levels and sub-seasonal to annual high tide flooding predictions and outlooks are also among the derived products to be added. Moreover, the domain of the analysis will be expanded to the Pacific and the dataset to be included when it becomes available.

    Access & Use Information

    License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

    Downloads & Resources

    Dates

    Metadata Date September 26, 2025
    Metadata Created Date May 27, 2025
    Metadata Updated Date September 30, 2025
    Reference Date(s) 2024 (creation), (publication)
    Frequency Of Update annually

    Metadata Source

    Harvested from NOS CO-OPS

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Date September 26, 2025
    Metadata Created Date May 27, 2025
    Metadata Updated Date September 30, 2025
    Reference Date(s) 2024 (creation), (publication)
    Responsible Party Center for Operational Oceanographic Products and Services (Point of Contact, Custodian)
    Contact Email
    Guid gov.noaa.nmfs.inport:75048
    Access Constraints Cite As: Center for Operational Oceanographic Products and Services, [Date of Access]: Coastal Ocean Reanalysis (CORA) [Data Date Range], https://www.fisheries.noaa.gov/inport/item/75048., Access Constraints: There are no constraints., Use Constraints: There are no constraints.
    Bbox East Long -53.8
    Bbox North Lat 45.8
    Bbox South Lat 5.8
    Bbox West Long -98
    Coupled Resource
    Frequency Of Update annually
    Harvest Object Id c083b59a-db5e-49d0-8252-ec7c352f1cac
    Harvest Source Id 217272a2-c20f-4b9e-a0e1-e42a6d539971
    Harvest Source Title NOS CO-OPS
    Licence NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose.
    Lineage Each year of the reanalysis is run independently to simplify overall simulation, staging, processing, and management of resources on HPC clusters. This also allows for concurrent simulation of multiple years.
    Metadata Language eng
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": [[[-98.0, 5.8], [-53.8, 5.8], [-53.8, 45.8], [-98.0, 45.8], [-98.0, 5.8]]]}
    Progress onGoing
    Spatial Data Service Type
    Spatial Reference System EPSG::5714
    Spatial Harvester True
    Temporal Extent Begin 1978
    Temporal Extent End 2022

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