gov.noaa.nmfs.inport:80396 eng UTF8 gov.noaa.nmfs.inport:79430 dataset Mixed geospatial files Office of Coast Survey resourceProvider Seroka, Gregory 240-847-8272 gregory.seroka@noaa.gov pointOfContact 2026-09-22T16:57:32 ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data ISO 19115-2:2009(E) EPSG::4326 NOAA S-104 Water Level Data S-104 2025 creation publication NOAA/NMFS/EDM 80396 https://www.fisheries.noaa.gov/inport/item/80396 WWW:LINK-1.0-http--link Full Metadata Record View the complete metadata record on InPort for more information about this dataset. information https://marinenavigation.noaa.gov/index.html WWW:LINK-1.0-http--link Precision Marine Navigation Website Homepage for all Precision Marine Navigation infromation. download https://noaa-s104-pds.s3.amazonaws.com/README.html WWW:LINK-1.0-http--link NOAA S-104 Water Level Information for Surface Navigation Data on AWS ReadMe This webpage serves as the official technical documentation and dataset guide for NOAA’s S-104 Water Level for Surface Navigation Dataset, hosted on the Amazon Web Services (AWS) NOAA Open Data Dissemination (NODD) platform. It provides developers, system integrators, and data analysts with the technical specifications required to programmatically access, process, and integrate NOAA's S-104 HDF5 forecast files. download https://marinenavigation.noaa.gov/s100.html WWW:LINK-1.0-http--link The Universal Hydrographic Data Model Website This website provides information on the S-100 Universal Hydrographic Data Model serves as the foundational framework for modern hydrographic and maritime geospatial data. S-104 products are part of this framework. download https://registry.iho.int/productspec/view.do?idx=209&product_ID=S-104&statusS=5&domainS=ALL&category=product_ID&searchValue= WWW:LINK-1.0-http--link IHO Geospatial Information Registry - S-104 Product Specification Website This website, hosted on the International Hydrographic Organization (IHO) Geospatial Information Registry, is the official distribution portal for the S-104 Product Specification (Water Level Information for Surface Navigation). It provides a comprehensive summary of the S-104 data model—which standardizes observed, predicted, and forecasted water level data for integration into navigational systems—and serves as the primary repository for downloading the official specification documents, validation checks, and feature catalogues across different published versions. download S-104 is a data and metadata encoding specification that is part of the S-100 Universal Hydrographic Data Model, an international standard for hydrographic data. This collection of data contains water level forecast guidance from NOAA's Global Surge and Tide Operational Forecast System 2-D (STOFS-2D-Global), an operational hydrodynamic nowcast and forecast modeling system for global water level conditions. These datasets are encoded as HDF-5 files conforming to the S-104 specification, and are geospatially subset into individual tiles conforming to the NOAA/OCS Nautical Product Tiling Scheme, with filenames indicating the corresponding NOAA Electronic Navigational Chart (ENC) Cell Identifier. A set of prototype S-104 tiles has been created for the Charleston, SC area for a select model run cycle. Each individual S-104 (HDF-5) file contains all forecast projections from a single model run for that geographic area. A single S-104 file will contain multiple gridded arrays each containing a forecast valid at a distinct time in the future, out to the forecast horizon of STOFS-2D-Global, which is 180 hours or 7.5 days. The water level forecast guidance includes the combined effects of storm surge (sub-tidal) and tides (astronomical tide predictions). The international standard for water levels is S-104. Like surface current forecasts, this standard addresses how relevant tidal and water level forecast data is displayed in ship board navigation systems without compromising the ability to navigate using an electronic chart. The water level standard is still under development by the International Hydrographic Organization. onGoing Seroka, Gregory 240-847-8272 gregory.seroka@noaa.gov custodian continual EARTH SCIENCE > OCEANS > COASTAL PROCESSES > SEA SURFACE HEIGHT EARTH SCIENCE > OCEANS > SEA SURFACE TOPOGRAPHY > SEA SURFACE HEIGHT EARTH SCIENCE > OCEANS > TIDES EARTH SCIENCE > OCEANS > TIDES > STORM SURGE EARTH SCIENCE > OCEANS > TIDES > TIDAL HEIGHT theme Global Change Master Directory (GCMD) Science Keywords 23.3 OCEAN place Global Change Master Directory (GCMD) Location Keywords 23.3 Precision Marine Navigation S-104 STOFS Water level forecast theme DOC/NOAA/NOS/OCS > Office of Coast Survey, National Ocean Service, NOAA, U.S. Department of Commerce dataCentre Global Change Master Directory (GCMD) Data Center Keywords 2017-04-24 publication 8.5 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2026. GCMD Keywords, Version 24. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian Surge and Tide Operational Forecast System (STOFS) project InPort otherRestrictions Cite As: Office of Coast Survey, [Date of Access]: NOAA S-104 Water Level Data [Data Date Range], https://www.fisheries.noaa.gov/inport/item/80396. 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. license These data were produced by NOAA and are not subject to copyright protection in the United States. NOAA waives any potential copyright and related rights in these data worldwide through the Creative Commons Zero 1.0 Universal Public Domain Dedication (CC0-1.0). SPDX License: Creative Commons Zero v1.0 Universal (CC0-1.0) otherRestrictions Access Constraints: NOAA S-104 datasets are open to the public and can be used, integrated, or redistributed freely. otherRestrictions Use Constraints: S-104 datasets sourced from NOAA models (such as STOFS-2D-Global) represent forecast guidance. They are provided "as-is" without warranties of fitness for a specific navigational purpose and do not replace certified hydrographic publications under SOLAS unless explicitly authorized. NOAA requests attribution for the use or dissemination of unaltered NOAA data. However, it is not permissible to state or imply endorsement by or affiliation with NOAA. If you modify NOAA data, you may not state or imply that it is original, unaltered NOAA data. otherRestrictions Distribution Liability: NOAA S-104 datasets are open to the public and can be used, integrated, or redistributed freely to encourage innovation. S-104 datasets sourced from NOAA models (such as STOFS-2D-Global) represent forecast guidance. They are provided "as-is" without warranties of fitness for a specific navigational purpose and do not replace certified hydrographic publications under SOLAS unless explicitly authorized. unclassified NOAA S-111 Surface Water Currents Data NOAA/NMFS/EDM 80399 crossReference Surge and Tide Operational Forecast System (STOFS) - 2D NOAA/NMFS/EDM 79429 largerWorkCitation eng; US oceans -180 180 -90 90 2020 false eng false S-104_Water_Level_Information_For_Surface_Navigation_Ed_2.0.0.pdf https://registry.iho.int/productspec/view.do?idx=209&product_ID=S-104&statusS=5&domainS=ALL&category=product_ID&searchValue= WWW:LINK-1.0-http--link Entity Attribute Detail URL Entity Attribute Detail URL information NC - NetCDF Web Service (Other) Office of Coast Survey 1315 East West Highway Silver Spring MD 20910 https://www.nauticalcharts.noaa.gov/ WWW:LINK-1.0-http--link Office of Coast Survey Website Website listed for Office of Coast Survey information distributor https://registry.opendata.aws/noaa-s104/ WWW:LINK-1.0-http--link NOAA S-104 Water Level Data S-104 is a data and metadata encoding specification that is part of the S-100 Universal Hydrographic Data Model, an international standard for hydrographic data. This collection of data contains water level forecast guidance from NOAA's Global Surge and Tide Operational Forecast System 2-D (STOFS-2D-Global), an operational hydrodynamic nowcast and forecast modeling system for global water level conditions. These datasets are encoded as HDF-5 files conforming to the S-104 specification, and are geospatially subset into individual tiles conforming to the NOAA/OCS Nautical Product Tiling Scheme, with filenames indicating the corresponding NOAA Electronic Navigational Chart (ENC) Cell Identifier. A set of prototype S-104 tiles has been created for the Charleston, SC area for a select model run cycle. Each individual S-104 (HDF-5) file contains all forecast projections from a single model run for that geographic area. A single S-104 file will contain multiple gridded arrays each containing a forecast valid at a distinct time in the future, out to the forecast horizon of STOFS-2D-Global, which is 180 hours or 7.5 days. The water level forecast guidance includes the combined effects of storm surge (sub-tidal) and tides (astronomical tide predictions). NetCDF4 is selected as the distribution format because it is built directly on top of the underlying HDF5 data model and binary storage architecture. download https://nowcoast.noaa.gov/ WWW:LINK-1.0-http--link nowCOAST Dissemination Platform Office of Coast Survey's nowCOAST is a GIS-based web mapping application providing present and future oceanographic, meteorological, and hydrologic information (observations, analyses, forecasts, alerts) from NOAA along with bathymetric data for U.S. coastal areas to support public safety, coastal preparedness, response, and precision marine navigation. download dataset Representativeness Uncertainty quantification of the model's representativeness of the frequency distribution in the population of interest is part of future work, by using ensembles, which are multiple iterations of the model simulation to determine the distribution for each variable. Accuracy The model's water level is assessed for its accuracy, stability, and robustness through a three-year hindcast simulation as well as ongoing skill assessment in real-time for all model forecast cycles. Horizontal Positional Accuracy Quantified by comparing the model mesh grid to the real world spatial reference system (e.g. WGS84). Vertical Positional Accuracy Quantified by comparing the bathymetry/topography underlying the model with observed raw surveys of bathymetry/topography and quantifying the total propagated uncertainty (TPU) during transformation from the raw survey's vertical datum to the vertical datum used by the model. Bias Bias is determined by running comparisons of the model against observations, and quantifying the bias of the model. Bias is calculated at station locations by subtracting the combined forecast guidance of storm surge and tide from the observed water level. A post-processing bias correction method is also implemented at station locations where NOS/CO-OPS observations are available, which involves averaging the bias over the most recent five days of nowcasts and observations to adjust future forecast guidance. The average bias recorded during the evaluation period was -0.01 m. Bias corrections are conducted in post-processing for STOFS-2D-Global. Comparability Both model and observation data are converted into the LMSL datum using NOAA's VDatum tool for direct comparison. The mesh bathymetry near the coast is converted to LMSL using the VDatum software to standardize the vertical datum. A combination of different Digital Elevation Model (DEM) sources is used for mesh generation and bathymetry. Precision Precision is determined by running comparisons of the model against observations, and quantifying the precision (e.g. unbiased RMSE) of the model. The RMSE and the bias fluctuates depending on the cycle due to significant meteorological events, such as storms; nonetheless, the average RMSE recorded during the evaluation period is 0.082 m. Preprocessing (Only coldstart) jstofs_2d_glo_cold_adcprep.ecf - Execute adcirc adcprep jstofs_2d_glo_cold_spinup.ecf - Run tidal-spinup run Seroka, Gregory 240-847-8272 gregory.seroka@noaa.gov processor Processing jstofs_2d_glo_tide_nowcast.ecf - Run tide run for nowcast jstofs_2d_glo_tide_forecast1.ecf - Run tide run for forecast jstofs_2d_glo_tide_forecast1.ecf - Run tide run for forecast jstofs_2d_glo_gfs_ncst.ecf - Create GFS forcing for nowcast jstofs_2d_glo_surf_nowcast.ecf - Run forcing run for nowcast jstofs_2d_glo_gfs_fcst1.ecf - Create GFS forcing for forecast jstofs_2d_glo_surf_forecast1.ecf - Run forcing run for forecast jstofs_2d_glo_gfs_fcst2.ecf - Create GFS forcing for forecast jstofs_2d_glo_surf_forecast2.ecf - Run forcing run for forecast Seroka, Gregory 240-847-8272 gregory.seroka@noaa.gov processor Post-processing jstofs_2d_glo_post_anomaly.ecf - Compute anomaly jstofs_2d_glo_post_bias_correction.ecf - Grid bias correction jstofs_2d_glo_post_ncdiff.ecf - Compute the sub-tidal water level jstofs_2d_glo_post_grib2.ecf - Create SHEF and grib2 output jstofs_2d_glo_post_ncrcat.ecf - Combine GFS surface forcing jstofs_2d_glo_gempak.ecf - Create gempak output Seroka, Gregory 240-847-8272 gregory.seroka@noaa.gov processor Source Contribution: Funakoshi, Y., Seroka, G., Moghimi, S., Myers, E., Alipour, A., Haddad, J., Mani, S., Westerink, J., Cerrone, A., Tejaswi, A., Blakely, C., & Wood, D. (2025). NOAA's Surge and Tide Operational Forecast System 2D Global (STOFS-2D-Global) Version 2 (NOAA Technical Report NOS CS 42). Office of Coast Survey. https://doi.org/10.25923/y34r-z463 Operational STOFS-2D-Global Configuration 2020-01-01 publication Office of Coast Survey https://repository.library.noaa.gov/view/noaa/72262 WWW:LINK-1.0-http--link NOAA's Surge and Tide Operational Forecast System 2D Global (STOFS-2D-Global) (v2) NOAA Technical Report NOS CS 42: NOAA's Surge and Tide Operational Forecast System 2D Global (STOFS-2D-Global) version 2 information publisher 2020