Category 1 SLOSH MOM Inundation (HIGH Tide Scenario)

Metadata also available as

Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: NHC Storm Surge Unit
Publication_Date: 20161213
Title: Category 1 SLOSH MOM Inundation (HIGH Tide Scenario)
Geospatial_Data_Presentation_Form: raster digital data
Description:
Abstract:
The SLOSH (Sea, Lake, and Overland Surges from Hurricanes) model is a numerical model used by NWS to compute storm surge. Storm surge is defined as the abnormal rise of water generated by a storm, over and above the predicted astronomical tides. Flooding from storm surge depends on many factors, such as the track, intensity, size, and forward speed of the hurricane and the characteristics of the coastline where it comes ashore or passes nearby. For planning purposes, the NHC uses a representative sample of hypothetical storms to estimate the near worst-case scenario of flooding for each hurricane category. SLOSH employs curvilinear polar, elliptical, and hyperbolic telescoping mesh grids to simulate the storm surge hazard. The spatial coverage for each SLOSH grid ranges from an area the size of a few counties to a few states. The resolution of individual grid cells within each basin ranges from tens to hundreds of meters to a kilometer or more. Sub-grid scale water features and topographic obstructions such as channels, rivers, and cuts and levees, barriers, and roads, respectively, are parameterized to improve the modeled water levels. NHC provides two near worst case scenario planning products based on hypothetical storm tracks: Maximum Envelopes of Water (MEOWs) and Maximum of Maximums (MOMs). MEOWs are created by computing the maximum storm surge resulting from up to 100,000 hypothetical storms simulated through each SLOSH grid of varying forward speed, radius of maximum wind, intensity (Categories 1-5), landfall location, initial water level, and storm direction. A MEOW product is created for each combination of category, forward speed, storm direction, and initial water level. SLOSH products do not include Category 5 storms north of the NC/VA border. For each storm combination, parallel storms make landfall in 5 to 10 mile increments along the coast within the SLOSH grid, and the maximum storm surge footprint from each simulation is composited, retaining the maximum height of storm surge in a given basin grid cell. No single hurricane will produce the regional flooding depicted in the MEOWs. SLOSH model MOMs are an ensemble product of maximum storm surge heights. MOMs are created for each SLOSH basin by compositing all the MEOWs, separated by category and initial water level, and selecting maximum storm surge value for each grid cell regardless of the forward speed, storm trajectory, or landfall location. MOMs represent the worst case scenario for a given category of storm and initial water level under ideal storm conditions. A high tide initial water level was used for the storm surge hazard maps. In locations that have a steep and narrow continental shelf, wave setup can be a substantial contributor to the total water level rise observed during a tropical cyclone. Wave setup is defined as the increase in mean water level due to momentum transfer to the water column by waves that are breaking or otherwise dissipating their energy. Through NOAA's Integrated Ocean Observing System (IOOS) Coastal and Ocean Modeling Testbed (COMT) the SLOSH model has been coupled to the Simulating Waves Nearshore (SWAN) third-generation wave model for storm surge modeling applications in island regions such as Puerto Rico. In these locations, SLOSH+SWAN simulations were conducted to create MEOW and MOM products that account for the increase in the mean water level due to wave setup. This product uses the expertise of the NHC Storm Surge Unit to merge the operational SLOSH grids to build a seamless map of storm surge hazard scenarios using the MOM product. Each individual SLOSH grid for the Category 1-5 MOMs are merged into a single, seamless grid. The seamless grid is then resampled, interpolated, and processed with a DEM (Digital Elevation Model, i.e. topography) to compute the storm surge hazard above ground for each hurricane category. It should be noted that the SLOSH MOM storm surge hazard data used to create these maps are constrained by the extent of the SLOSH grids. The resulting dataset is then reclassified into the bins described in the entity overview. The areas marked with a value of "99" represent certain levee areas, such as the Hurricane and Storm Damage Risk Reduction System in Louisiana. These areas are highly complex and this product should not be used to assess the storm surge hazard within these areas. Users are urged to consult local officials for flood risk inside these leveed areas. Not all levee areas are included in this analysis - in particular, local features such as construction walls, levees, berms, pumping systems, or other mitigation systems found at the local level may not be included in this analysis.
Purpose:
This mapping dataset provides a more user friendly, seamless national map of near worst case storm surge flooding scenarios using the National Weather Service (NWS) SLOSH model Maximum of MEOWs (MOMs) product for Category 1 hurricanes at a HIGH tide scenario. This dataset contains data for the continental United States, from Texas to Maine. The map adopts the GIS/Mapping process used for the National Hurricane Centers (NHC) real-time Potential Storm Surge Flooding map. However, this is not the real-time Potential Storm Surge Flooding map product. Storm Surge Hazard Maps: <http://www.nhc.noaa.gov/surge/hazardmaps/> SLOSH Model: <http://www.nhc.noaa.gov/surge/slosh.php> SLOSH Products: <http://www.nhc.noaa.gov/surge/products.php> Potential Storm Surge Flooding Map: <http://www.nhc.noaa.gov/surge/inundation/>
Status:
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -98.535678
East_Bounding_Coordinate: -66.873567
North_Bounding_Coordinate: 45.199645
South_Bounding_Coordinate: 24.491681
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: SLOSH MOMs
Theme_Keyword: storm surge risk
Theme_Keyword: inundation
Theme_Keyword: tropical cyclones
Theme_Keyword: storm surge
Theme_Keyword: storm surge flooding
Theme_Keyword: SLOSH
Theme_Keyword: hurricanes
Theme_Keyword: National Hurricane Center
Access_Constraints: None
Use_Constraints:
The data and maps in this tool illustrate the scale of potential flooding, not the exact location, and do not account for erosion, subsidence, or future construction. Water levels are based on storm surge and high tide scenarios. The data, maps, and information provided should only be used as a tool for general education/awareness of the storm surge hazard at a city/community level (not for a parcel level/grid cell assessment). The SLOSH MOM storm surge hazard data used to create these maps are constrained by the extent of the SLOSH grids and users should be aware that risk due to storm surge flooding could extend beyond the areas depicted in these maps. The data and maps in this tool are provided "as is", without warranty to their performance, merchantable state, or fitness for any particular purpose. The entire risk associated with the results and performance of these data is assumed by the user. This tool should be used strictly as a planning reference and storm surge risk awareness tool and not for navigation, permitting, legal purposes, or evacuation decision making.
Data_Set_Credit:
Data processed by the National Hurricane Center (NHC) Storm Surge Unit. SLOSH grid data (SLOSH MOMs) are provided by NWS Meteorological Development Lab (MDL). The primary elevation data used to compute inundation is provided by NOAA Office for Coastal Management (OCM), USGS 3D Elevation Program (3DEP) used outside the extent of OCM data.
Native_Data_Set_Environment: Version 6.2 (Build 9200) ; Esri ArcGIS 10.6.1.9270
Data_Quality_Information:
Logical_Consistency_Report:
Standard methods for determining inundation were used. The vertical accuracy of these data are dependent on the source elevation data.
Completeness_Report:
Not all SLOSH MOMs were used in this analysis. The operational set of SLOSH MOMs/MEOWs can be found at: <http://slosh.nws.noaa.gov/sloshPub/>
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: NWS Meteorological Development Lab (MDL)
Title: NWS SLOSH MOMs
Online_Linkage: <http://slosh.nws.noaa.gov/sloshPub/>
Type_of_Source_Media: onLine
Source_Citation_Abbreviation: NWS SLOSH MOMs
Source_Contribution:
The operational SLOSH MOMs are the basis for the storm surge data used to compute inundation in this dataset.
Source_Information:
Source_Citation:
Citation_Information:
Originator: South Florida Water Management District (SFWMD)
Title: South Florida Water Management District (SFWMD)
Online_Linkage: <http://my.sfwmd.gov/portal/page/portal/levelthree/gis>
Type_of_Source_Media: onLine
Source_Citation_Abbreviation: SFWMD 50 ft topo
Source_Contribution: This dataset is used for portions of the Florida Everglades.
Source_Information:
Source_Citation:
Citation_Information:
Originator: NOAA Office for Coastal Management (OCM)
Publication_Date: 20150101
Title: NOAA OCM MHHW Raster
Online_Linkage: <http://coast.noaa.gov/slr>
Type_of_Source_Media: onLine
Source_Citation_Abbreviation: NOAA OCM 0MHHW Raster
Source_Contribution:
This raster datset is used as part of the process to generate intertidal zone/estuarine wetlands mask.
Source_Information:
Source_Citation:
Citation_Information:
Originator: USGS
Publication_Date: 20140101
Title: USGS 3D Elevation Program (3DEP)
Online_Linkage: <http://nationalmap.gov/3DEP/index.html>
Type_of_Source_Media: onLine
Source_Citation_Abbreviation: USGS 3D Elevation Program (3DEP)
Source_Contribution:
This digital elevation model (DEM) serves as the elevation dataset to compute inundation outside the extent of the OCM elevation dataset.
Source_Information:
Source_Citation:
Citation_Information:
Originator: NOAA Office for Coastal Management (OCM)
Publication_Date: 20150101
Title: NOAA OCM Digital Elevation Models
Online_Linkage: <http://coast.noaa.gov/slr>
Type_of_Source_Media: onLine
Source_Citation_Abbreviation: NOAA OCM Digital Elevation Models
Source_Contribution:
This digital elevation model (DEM) serves as the primary elevation dataset to compute inundation for this analysis.
Source_Information:
Source_Citation:
Citation_Information:
Originator: USGS
Publication_Date: 20090101
Title: USGS National Hydrography Dataset (NHD)
Online_Linkage: <http://nhd.usgs.gov>
Type_of_Source_Media: onLine
Source_Citation_Abbreviation: USGS National Hydrography Dataset (NHD)
Source_Contribution:
This vector dataset is used to aid in masking out waterbodies in the resampled DEM.
Process_Step:
Process_Description:
The usable area of the SLOSH grids were reduced to ignore spurious data along the grid boundaries and to retain high-resolution portions. The maximum water levels in each MOM were merged onto a uniform grid for processing. An accurate digital elevation model (DEM) takes considerable time, resource, and expertise to develop and is required to compute inundation. Two elevation datasets were used to derive the DEM: (1) the NOAA Office for Coastal Management(OCM) high-resolution sea level rise elevation dataset and (2) U.S. Geological Survey (USGS) 3D Elevation Program (3DEP). Since storm surge risk extends beyond the OCM extent, the USGS data was used to augment the OCM dataset. For this work, the USGS and OCM DEMs were resampled to 1 arc-second using a bilinear interpolation and mosaicked together to produce a seamless raster elevation dataset. This DEM was then smoothed using the focal statistics tool in Esri ArcGIS software. Specifically, the DEM was smoothed using a neighborhood circle approach with a radius of 2 grid cells. The USGS vector hydrography dataset was used to aid in masking out water bodies in the resulting resampled DEM. The merged MOM grids were processed with this DEM using standard methods for computing inundation. Other hazards, such as large and dangerous waves, inland flooding, or other flooding associated with tropical cyclones are not mapped in this dataset.
Process_Date: 20161213
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:
Raster_Object_Type: Grid Cell
Row_Count: 76840
Column_Count: 117487
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 8.9831528411952133e-09
Longitude_Resolution: 8.9831528411952133e-09
Geographic_Coordinate_Units: Decimal Degrees
Geodetic_Model:
Horizontal_Datum_Name: D North American 1983
Ellipsoid_Name: GRS 1980
Semi-major_Axis: 6378137.0
Denominator_of_Flattening_Ratio: 298.257222101
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: US_Category1_MOM_Inundation_HighTide.tif.vat
Entity_Type_Definition: Table
Entity_Type_Definition_Source: Table
Attribute:
Attribute_Label: OID
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: Esri
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated
Attribute:
Attribute_Label: VALUE
Attribute_Definition: storm surge bin code
Attribute_Definition_Source: NWS/NHC
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: 1
Enumerated_Domain_Value_Definition: Less than 1 foot above ground
Enumerated_Domain_Value_Definition_Source: NWS/NHC
Enumerated_Domain:
Enumerated_Domain_Value: 2
Enumerated_Domain_Value_Definition: 1 to 2 feet above ground
Enumerated_Domain_Value_Definition_Source: NWS/NHC
Enumerated_Domain:
Enumerated_Domain_Value: 3
Enumerated_Domain_Value_Definition: 2 to 3 feet above ground
Enumerated_Domain_Value_Definition_Source: NWS/NHC
Enumerated_Domain:
Enumerated_Domain_Value: 4
Enumerated_Domain_Value_Definition: 3 to 4 feet above ground
Enumerated_Domain_Value_Definition_Source: NWS/NHC
Enumerated_Domain:
Enumerated_Domain_Value: 5
Enumerated_Domain_Value_Definition: 4 to 5 feet above ground
Enumerated_Domain_Value_Definition_Source: NWS/NHC
Enumerated_Domain:
Enumerated_Domain_Value: 6
Enumerated_Domain_Value_Definition: 5 to 6 feet above ground
Enumerated_Domain_Value_Definition_Source: NWS/NHC
Enumerated_Domain:
Enumerated_Domain_Value: 7
Enumerated_Domain_Value_Definition: 6 to 7 feet above ground
Enumerated_Domain_Value_Definition_Source: NWS/NHC
Enumerated_Domain:
Enumerated_Domain_Value: 8
Enumerated_Domain_Value_Definition: 7 to 8 feet above ground
Enumerated_Domain_Value_Definition_Source: NWS/NHC
Enumerated_Domain:
Enumerated_Domain_Value: 9
Enumerated_Domain_Value_Definition: 8 to 9 feet above ground
Enumerated_Domain_Value_Definition_Source: NWS/NHC
Enumerated_Domain:
Enumerated_Domain_Value: 10
Enumerated_Domain_Value_Definition: 9 to 10 feet above ground
Enumerated_Domain_Value_Definition_Source: NWS/NHC
Enumerated_Domain:
Enumerated_Domain_Value: 11
Enumerated_Domain_Value_Definition: 10 to 11 feet above ground
Enumerated_Domain_Value_Definition_Source: NWS/NHC
Enumerated_Domain:
Enumerated_Domain_Value: 12
Enumerated_Domain_Value_Definition: 11 to 12 feet above ground
Enumerated_Domain_Value_Definition_Source: NWS/NHC
Enumerated_Domain:
Enumerated_Domain_Value: 13
Enumerated_Domain_Value_Definition: 12 to 13 feet above ground
Enumerated_Domain_Value_Definition_Source: NWS/NHC
Enumerated_Domain:
Enumerated_Domain_Value: 14
Enumerated_Domain_Value_Definition: 13 to 14 feet above ground
Enumerated_Domain_Value_Definition_Source: NWS/NHC
Enumerated_Domain:
Enumerated_Domain_Value: 15
Enumerated_Domain_Value_Definition: 14 to 15 feet above ground
Enumerated_Domain_Value_Definition_Source: NWS/NHC
Enumerated_Domain:
Enumerated_Domain_Value: 16
Enumerated_Domain_Value_Definition: 15 to 16 feet above ground
Enumerated_Domain_Value_Definition_Source: NWS/NHC
Enumerated_Domain:
Enumerated_Domain_Value: 17
Enumerated_Domain_Value_Definition: 16 to 17 feet above ground
Enumerated_Domain_Value_Definition_Source: NWS/NHC
Enumerated_Domain:
Enumerated_Domain_Value: 18
Enumerated_Domain_Value_Definition: 17 to 18 feet above ground
Enumerated_Domain_Value_Definition_Source: NWS/NHC
Enumerated_Domain:
Enumerated_Domain_Value: 19
Enumerated_Domain_Value_Definition: 18 to 19 feet above ground
Enumerated_Domain_Value_Definition_Source: NWS/NHC
Enumerated_Domain:
Enumerated_Domain_Value: 20
Enumerated_Domain_Value_Definition: 19 to 20 feet above ground
Enumerated_Domain_Value_Definition_Source: NWS/NHC
Enumerated_Domain:
Enumerated_Domain_Value: 21
Enumerated_Domain_Value_Definition: Greater than 20 feet above ground
Enumerated_Domain_Value_Definition_Source: NWS/NHC
Enumerated_Domain:
Enumerated_Domain_Value: 99
Enumerated_Domain_Value_Definition: *Levee Areas. See note in entity overview
Enumerated_Domain_Value_Definition_Source: NWS/NHC
Attribute:
Attribute_Label: COUNT
Attribute_Definition: Pixel Count.
Attribute_Definition_Source: Esri
Attribute_Domain_Values:
Unrepresentable_Domain: Count generated with raster attribute table.
Attribute:
Attribute_Label: data_range
Overview_Description:
Entity_and_Attribute_Overview:
Not all levee protected areas are included in this analysis - in particular, local features such as construction walls, levees, berms, pumping systems, or other mitigation systems found at the local level may not be included in this analysis.
Entity_and_Attribute_Detail_Citation: NWS/NHC
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: NOAA/NWS/NHC
Contact_Person: Jamie Rhome
Contact_Position: Storm Surge Unit Team Lead
Contact_Address:
Address_Type: mailing and physical
Address: 11691 SW 17th St
City: Miami
State_or_Province: Florida
Postal_Code: 33165
Contact_Electronic_Mail_Address: jamie.r.rhome@noaa.gov
Distribution_Liability:
Any conclusions drawn from the analysis of this information are not the responsibility of the National Weather Service, National Hurricane Center, Office for Coastal Management, or its partners.
Metadata_Reference_Information:
Metadata_Date: 20210513
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: NOAA/NWS/NHC
Contact_Position: Storm Surge Unit Team Lead
Contact_Address:
Address_Type: mailing and physical
Address: address
City: Miami
State_or_Province: Florida
Postal_Code: 33165
Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Generated by mp version 2.9.12 on Thu May 13 13:48:20 2021