Patrick L. Barnard Li H. Erikson Amy C. Foxgrover Kees Nederhoff Andrea C. O'Neill Jennifer A. Thomas Ayesha Sarfraz 20251215 wave height data in geoTIFF formats data release DOI:10.5066/P9048D1S Pacific Coastal and Marine Science Center Santa Cruz, California U.S. Geological Survey https://doi.org/10.5066/P9048D1S https://www.sciencebase.gov/catalog/item/68dad52ed4be021b36eb6549 Patrick L. Barnard Li H. Erikson Amy C. Foxgrover Patrick W. Limber Kees Nederhoff Andrea C. O'Neill Jennifer A. Thomas Sean F. Vitousek Ayesha Sarfraz 2022 modeling results presented in various formats data release DOI:10.5066/P9048D1S Pacific Coastal and Marine Science Center, Santa Cruz, California U.S. Geological Survey https://doi.org/10.5066/P9048D1S These data contain maximum model-derived significant wave height (in meters) for the sea-level change and storm condition indicated. These data are intended for policy makers, resource managers, science researchers, technical users, students, and the general public. These data can be used with geographic information systems or other software to identify and assess possible areas of vulnerability. These data are not intended to be used for navigation. This work is one portion of ongoing modeling efforts for California and the western United States. The Coastal Storm Modeling system uses several tiers of numerical models to make detailed predictions (meter-scale) of flooding and erosion over large geographic scales. For more information on CoSMoS implementation, see https://www.usgs.gov/centers/pcmsc/science/coastal-storm-modeling-system-cosmos 2025 year of publication Complete None planned -124.07495006 -123.53584631 40.00367439 38.71390778 Data Categories for Marine Planning Physical Habitats and Geomorphology Global Change Master Directory (GCMD) Hazards Planning Ocean Waves Ocean Winds Beaches Erosion Storm Surge Extreme Weather Floods Water Depth Data Categories for Marine Planning Predictions Wind Ocean Currents Tides USGS Thesaurus Storms Wind Floods mathematical modeling earth sciences ISO 19115 Topic Category Oceans Marine Realms Information Bank (MRIB) Keywords waves floods coastal erosion None U.S. Geological Survey USGS Coastal and Marine Hazards and Resources Program CMHRP Pacific Coastal and Marine Science Center PCMSC USGS Metadata Identifier USGS:68dad52ed4be021b36eb6549 Geographic Names Information System Mendocino County State of California None Northern California Northern California Coast No access constraints USGS-authored or produced data and information are in the public domain from the U.S. Government and are freely redistributable with proper metadata and source attribution. These data are marked with a Creative Common CC0 1.0 Universal License. Please recognize and acknowledge the U.S. Geological Survey as the originator(s) of the dataset and in products derived from these data. U.S. Geological Survey, Pacific Coastal and Marine Science Center PCMSC Science Data Coordinator mailing and physical

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Santa Cruz CA 95060-5792 US 831-460-4747 831-427-4748 pcmsc_data@usgs.gov This project was funded by U.S. Geological Survey Coastal and Marine Hazards and Resources Program. Resources supporting this work were provided by the NASA High-End Computing (HEC) Program through the NASA Advanced Supercomputing (NAS) Division at Ames Research Center, and USGS Advanced Research Computing (Falgout and others, 2024). O'Neill, A.C. Erikson, L.H. Barnard, P.L. Limber, P.W. Vitousek, S. Warrick, J Foxgrover, A.C. Lovering, J.L. 2018 O'Neill, A.C., Erikson, L.H., Barnard, P.L., Limber, P.W., Vitousek, S., Warrick, J.A., Foxgrover, A.C., Lovering, J., 2018, Projected 21st Century Coastal Flooding in the Southern California Bight. Part 1: Development of the Third Generation CoSMoS Model: Journal of Marine Science and Engineering, vol. 6, art. 59, https://doi.org/10.3390/jmse6020059. O'Neill, A.C. Nederhoff, K. Erikson, L.H. Thomas, J.A. Barnard, P.L. 2024 O'Neill, A.C., Nederhoff, K., Erikson, L.H., Thomas, J.A., Barnard, P.L., 2024, A Dataset of Two-Dimensional XBeach Model Set-Up Files for Northern California: Data, vol. 9, art. 118, https://doi.org/10.3390/data9100118. Falgout, J.T. Gordon, J. Williams, B. Davis, M.J. 2024 Falgout, Jeff T, Janice Gordon, Brad Williams, Matthew J. Davis, 2024, USGS Advanced Research Computing, USGS Denali Supercomputer: U.S. Geological Survey, https://doi.org/10.5066/P9PSW367. (accessed 01 December 2024) Attribute values are model-derived wave heights due to plausible sea-level rise and future storm conditions and therefore cannot be validated against observations. The projections were generated using the latest downscaled climate projections for Northern California and calibrated hydrodynamic models. See O'Neill and others (2018, 2024) for more information. Data have undergone quality checks and meet standards. Dataset is considered complete for the information presented (as described in the abstract) and will be updated as necessary as improvements are developed. Users are advised to read the metadata record and cited references carefully for additional details. Data are concurrent with topobathymetric DEM locations. Model-derived data are accurate within the limitations outlined in O'Neill and others (2018). U.S. Geological Survey 2022 online U.S. Geological Survey https://topotools.cr.usgs.gov/topobathy_viewer/ online database 2022 year accessed DEM Topographic and bathymetry elevation data used in models Shirzaei, M. 2022 online Virginia Tech https://doi.org/10.7294/17711000 online 2022 publication date VLM Vertical land motion rates for California to include in flood potential O'Neill, A.C. Thomas, J.A. Erikson, L.H. Barnard, P.L. 2023 online U.S. Geological Survey https://doi.org/10.5066/P9048D1S https://www.sciencebase.gov/catalog/item/64347417d34ee8d4add91266 online 2024 publication date tier 2 sub-regional models tier 2 simulations cover the Northern California region and provide boundary conditions to higher-resolution XBeach models O'Neill, A.C. Nederhoff, K. Erikson, L.H. Thomas, J.A. Barnard, P.L. 2024 online U.S. Geological Survey https://doi.org/10.5066/P9048D1S https://www.sciencebase.gov/catalog/item/6621b3c9d34e7eb9eb7f96c1 online 2024 publication date tier 3 XBeach models tier 3 simulations resulting in final hazards data projections After setting up tier 3 XBeach models for all storm and SLR conditions used in tier 2 sub-regional models and completing all simulations on high performance computing resources, all simulation data were downloaded and post-processed to extract maximum water levels at each grid point over the entire simulation, in addition to the associated duration of the water over the simulation. Significant wave height and velocity were similarly processed from tier 2 sub-regional models. For each output variable, maximum values for all contributing events in a storm scenario are composited to show the total maximum value for the scenario at each grid point from all simulations (for example, maximum output for all 100-year storm events are composited to a single 100-year scenario data layer). See O'Neill and others (2018, 2024) for information on CoSMoS framework, set up for simulations, and processing. Maximum output for water elevations were depth-differenced to the DEM to separate low-lying vulnerable areas from contiguous coastal flooding. Other output data (water elevation, flood depth, maximum current velocities, maximum wave heights) were clipped to final flood hazard extent. Flood potential projections (maximum and minimum flood uncertainty) were derived by adding/subtracting estimated model error, DEM uncertainty, and projected VLM for a given SLR to the respective water elevation surface. See O'Neill and others (2018) for a full discussion. tier 3 XBeach models tier 2 sub-regional models DEM VLM 20241015 final hazards projections Final projected data are labeled by scenario indicating a given SLR (SLRs of 0 m, 0.25 m, 0.5 m, 0.75 m, 1.0 m, 1.5 m, 2.0 m, 2.5 m, 3.0 m, and 5.0 m) and storm condition (no-storm, 1-year storm, 20-year storm, and 100-year storm). For projected flood depths, duration, maximum current velocities, maximum wave heights, and water elevation, data are sub-divided into blocks. Blocks are labeled 'DNXX', where 'XX' is a sequential block number starting with '01' in the south and increasing to '04' heading northwards. Data are packaged in zip files by storm scenario. 20250124 The metadata title was modified to move the location to the beginning of the title. This was done to meet new system requirements as ScienceBase is migrated to a new platform, and to keep datasets grouped by location on the new data release landing page. The associated Network Resource Links were updated to reflect these changes to the data release landing page. (20260326). 20260326 Manda Au U.S. Geological Survey Data Management Specialist Mailing

2885 Mission Street

Santa Cruz CA 95060 831-460-7575 mau@usgs.gov Raster pixel Universal Transverse Mercator 10 0.999600 -100.000000 0.000000 500000.000000 0.000000 row and column 2.000000 2.000000 meters North American Datum 1983 (NSRS2007) Geodetic Reference System 80 6378137.000000 298.257222 NAVD88 2.0 meters Implicit coordinate CoSMoS Northern California 3.2: hazard projections for Mendocino County CoSMoS projections originators at United States Geological Survey, Pacific Coastal and Marine Science Center Projected maximum significant wave height for coincident flood hazards for given sea-level rise (SLR) value and storm condition (no storm, 1-year storm, 20-year storm and 100-year storm) significant wave height model derived 0.0 14.0 meters 0.1 Zip files contain projected wave hazard information for stated storm scenario condition for Mendocino County. Projected data are labeled by scenario indicating a given SLR (SLRs of 0 m, 0.25 m, 0.5 m, 0.75 m, 1.0 m, 1.5 m, 2.0 m, 2.5 m, 3.0 m, and 5.0 m) and storm condition (no-storm, 1-year storm, 20-year storm, and 100-year storm). Data are further sub-divided into blocks. Blocks are labeled 'DNXX', where 'XX' is a sequential block number starting with '01' in the south and increasing to '04' heading northwards. The entity and attribute information were generated by the individual and/or agency identified as the originator of the data set. Please review the rest of the metadata record for additional details and information. U.S. Geological Survey - ScienceBase mailing and physical

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Denver CO 80225 USA 1-888-275-8747 sciencebase@usgs.gov Data are available as zip files with a filename CoSMoS_NorthernCalifornina3-2_wave_hazards_**storm**_in_MendocinoCounty.ZIP, where **storm** indicates storm condition. Files contain projected significant wave height for coincident flood hazards for sea-level rise (SLR) and storm scenarios (W) indicated, for example SLR100_W020 are outputs for SLR of 1.0 m and a 20-year storm. Storm scenarios include no storm, 1-year storm, 20-year storm, and a 100-year storm. Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Flooded areas shown should not be used for navigation, regulatory, permitting, or other legal purposes. The U.S. Geological Survey provides these data as is for a quick reference, emergency planning tool but assumes no legal liability or responsibility resulting from the use of this information. The suggestions and illustrations included in these data are intended to improve coastal-flood awareness and preparedness; however, they do not guarantee the safety of an individual or structure. The contributors and sponsors of this product do not assume liability for any injury, death, property damage, or other effects of coastal flooding. geoTIFF ArcGIS Pro 3.3.2 Zip file contains geoTIFFs for the no-storm scenarios Zip 9060 https://www.sciencebase.gov/catalog/file/get/68dad52ed4be021b36eb6549?name=CoSMoS_NorthernCalifornina3-2_wave_hazards_no-storm_in_MendocinoCounty.zip https://doi.org/10.5066/P9048D1S https://cmgds.marine.usgs.gov/data-releases/community/cosmos/ Data can be downloaded using the Network_Resource_Name links. The first link is a direct link to these data. The second link points to the landing page for all of the CoSMoS Northern California 3.2 data. The third link points to the landing page for the entire CoSMoS project. geoTIFF ArcGIS Pro 3.3.2 Zip file contains geoTIFFs for the 1-year storm scenarios WinZip or archive utility 9170 https://www.sciencebase.gov/catalog/file/get/68dad52ed4be021b36eb6549?name=CoSMoS_NorthernCalifornina3-2_wave_hazards_1yr-storm_in_MendocinoCounty.zip https://doi.org/10.5066/P9048D1S https://cmgds.marine.usgs.gov/data-releases/community/cosmos/ Data can be downloaded using the Network_Resource_Name links. The first link is a direct link to these data. The second link points to the landing page for all of the CoSMoS Northern California 3.2 data. The third link points to the landing page for the entire CoSMoS project. geoTIFF ArcGIS Pro 3.3.2 Zip file contains geoTIFFs for the 20-year storm scenarios WinZip or archive utility 9220 https://www.sciencebase.gov/catalog/file/get/68dad52ed4be021b36eb6549?name=CoSMoS_NorthernCalifornina3-2_wave_hazards_20yr-storm_in_MendocinoCounty.zip https://doi.org/10.5066/P9048D1S https://cmgds.marine.usgs.gov/data-releases/community/cosmos/ Data can be downloaded using the Network_Resource_Name links. The first link is a direct link to these data. The second link points to the landing page for all of the CoSMoS Northern California 3.2 data. The third link points to the landing page for the entire CoSMoS project. geoTIFF ArcGIS Pro 3.3.2 Zip file contains geoTIFFs for the 100-year storm scenarios WinZip or archive utility 9030 https://www.sciencebase.gov/catalog/file/get/68dad52ed4be021b36eb6549?name=CoSMoS_NorthernCalifornina3-2_wave_hazards_100yr-storm_in_MendocinoCounty.zip https://doi.org/10.5066/P9048D1S https://cmgds.marine.usgs.gov/data-releases/community/cosmos/ Data can be downloaded using the Network_Resource_Name links. The first link is a direct link to these data. The second link points to the landing page for all of the CoSMoS Northern California 3.2 data. The third link points to the landing page for the entire CoSMoS project. none 20260326 U.S. Geological Survey, Pacific Coastal and Marine Science Center PCMSC Science Data Coordinator mailing and physical

2885 Mission Street

Santa Cruz CA 95060-5792 US 831-460-4747 831-427-4748 pcmsc_data@usgs.gov Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998