Tornado shapefile metadata

    Description:
      Abstract:
        This map layer shows tornado touchdown points in the United States, Puerto
        Rico, and the U.S. Virgin Islands, from 1950 to 2004.  Statistical data
        were obtained from the National Weather Service, Storm Prediction Center
        (SPC).  The SPC data originate from the Severe Thunderstorm Database and
        the National Oceanic and Atmospheric Administration (NOAA) Storm Data
        publication.
      Purpose:
        These data are intended for geographic display and analysis at the
        national level, and for large regional areas.  The data should be
        displayed and analyzed at scales appropriate for 1:2,000,000-scale data.
        No responsibility is assumed by the National Weather Service or the
        National Atlas of the United States in the use of these data.
      Supplemental_Information:
        This map layer represents an edited version of the information available,
        in ASCII format, from the SPC page at .  The
        SPC data set contains additional attributes, more information on tornadoes
        that affected multiple States, and additional tornadoes that were deleted
        from this map layer due to attribution problems.

        Historical tornado data is also available in the SPC's Historical Tornado
        Data Archive .

        For more information on the Fujita Tornado Damage Scale, see
         and
        .

        For information on current tornado watches and advisories, see
        .

        General information on tornadoes is available from the NOAA SPC's Online
        Tornado FAQ page at , and from
        NOAA's tornado page at .

    Time_Period_of_Content:
      Time_Period_Information:
        Range_of_Dates/Times:
          Beginning_Date: 19500101
          Ending_Date: 20041231
      Currentness_Reference: Ground condition
    Status:
      Progress: Complete
      Maintenance_and_Update_Frequency: Annually
    Spatial_Domain:
      Bounding_Coordinates:
        West_Bounding_Coordinate: -159.68
        East_Bounding_Coordinate: -67.20
        North_Bounding_Coordinate: 49.07
        South_Bounding_Coordinate: 19.50
    Keywords:
      Theme:
        Theme_Keyword_Thesaurus: ISO 19115 Topic Category
        Theme_Keyword: climatologyMeteorologyAtmosphere
      Theme:
        Theme_Keyword_Thesaurus: None
        Theme_Keyword: Tornadoes
        Theme_Keyword: Historical tornados
        Theme_Keyword: Tornado points
        Theme_Keyword: Historical tornado points
        Theme_Keyword: Violent storms
        Theme_Keyword: Severe storms
        Theme_Keyword: High winds
        Theme_Keyword: Tornado touchdowns
      Place:
        Place_Keyword_Thesaurus: None
        Place_Keyword: United States
      Place:
        Place_Keyword_Thesaurus:
          U.S. Department of Commerce, 1995, Countries, Dependencies, Areas of
          Special Sovereignty, and Their Principal Administrative Divisions
          (Federal Information Processing Standard (FIPS) 10-4): Washington,
          DC, National Institute of Standards and Technology.
        Place_Keyword: Alabama
        Place_Keyword: Alaska
        Place_Keyword: Arizona
        Place_Keyword: Arkansas
        Place_Keyword: California
        Place_Keyword: Colorado
        Place_Keyword: Connecticut
        Place_Keyword: Delaware
        Place_Keyword: District of Columbia
        Place_Keyword: Florida
        Place_Keyword: Georgia
        Place_Keyword: Hawaii
        Place_Keyword: Idaho
        Place_Keyword: Illinois
        Place_Keyword: Indiana
        Place_Keyword: Iowa
        Place_Keyword: Kansas
        Place_Keyword: Kentucky
        Place_Keyword: Louisiana
        Place_Keyword: Maine
        Place_Keyword: Maryland
        Place_Keyword: Massachusetts
        Place_Keyword: Michigan
        Place_Keyword: Minnesota
        Place_Keyword: Mississippi
        Place_Keyword: Missouri
        Place_Keyword: Montana
        Place_Keyword: Nebraska
        Place_Keyword: Nevada
        Place_Keyword: New Hampshire
        Place_Keyword: New Jersey
        Place_Keyword: New Mexico
        Place_Keyword: New York
        Place_Keyword: North Carolina
        Place_Keyword: North Dakota
        Place_Keyword: Ohio
        Place_Keyword: Oklahoma
        Place_Keyword: Oregon
        Place_Keyword: Pennsylvania
        Place_Keyword: Rhode Island
        Place_Keyword: South Carolina
        Place_Keyword: South Dakota
        Place_Keyword: Tennessee
        Place_Keyword: Texas
        Place_Keyword: Utah
        Place_Keyword: Vermont
        Place_Keyword: Virginia
        Place_Keyword: Washington
        Place_Keyword: West Virginia
        Place_Keyword: Wisconsin
        Place_Keyword: Wyoming
        Place_Keyword: Puerto Rico
        Place_Keyword: U.S. Virgin Islands

    Access_Constraints: None
    Use_Constraints:
      None.  Acknowledgement of the National Atlas of the United States of America
      and (or) the National Oceanic and Atmospheric Administration, National
      Weather Service, Storm Prediction Center would be appreciated in products
      derived from these data.
    Point_of_Contact:
      Contact_Information:
        Contact_Organization_Primary:
          Contact_Organization: NOAA Storm Prediction Center
        Contact_Position: SPC Warning Coordination Meteorologist
        Contact_Address:
          Address_Type: Mailing and physical address
          Address: 1313 Halley Circle
          City: Norman
          State_or_Province: OK
          Postal_Code: 73069
          Country: USA
        Contact_Voice_Telephone: 405-579-0747
        Contact_Electronic_Mail_Address: [email protected]
        Hours_of_Service: Monday - Friday 8:00 AM - 5:00 PM Eastern Time
  Data_Quality_Information:
    Logical_Consistency_Report: No tests for logical consistency have been performed on this map layer.
    Completeness_Report:
      This map layer includes the known tornado touchdown points in the United
      States, Puerto Rico, and the U.S. Virgin Islands, from 1950 through 2004.
      Tornadoes were deleted if their touchdown points fell outside the United
      States or in large water bodies.  Records missing latitude and longitude
      values were also deleted.
    Lineage:
      Source_Information:
        Source_Citation:
          Citation_Information:
            Originator:
              National Oceanic and Atmospheric Administration, National
              Weather Service, Storm Prediction Center
            Publication_Date: 200505
            Title: Tornado Statistics 1950-2004
            Publication_Information:
              Publication_Place: Norman, OK
              Publisher: NOAA Storm Prediction Center
            Online_Linkage: 
        Type_of_Source_Media: Online
        Source_Time_Period_of_Content:
          Time_Period_Information:
            Range_of_Dates/Times:
              Beginning_Date: 1950
              Ending_Date: 2004
          Source_Currentness_Reference: Ground condition
        Source_Citation_Abbreviation: ONETOR5004
        Source_Contribution: Spatial and attribute information.
      Process_Step:
        Process_Description:
          The ASCII text file of tornado statistics for the years 1950 to 2004
          was downloaded from the Storm Prediction Center and imported into
          Excel.  Header text was added, then the file was loaded into ArcView
          and saved as a shapefile.  Continuation records without latitude and
          longitude were deleted, as were records where latitude and longitude
          were 0.0.  Records were deleted for ten tornadoes with touchdown
          points that fell in Canada, Mexico, the ocean, or Lake Michigan.  For
          tornadoes that affected several States, the records with State
          information were deleted, but the records with full-path information
          were retained.  Fields were converted from decimal values to integers
          where appropriate, and several typographic errors were corrected.
          Unnecessary attribute fields were deleted.  The numeric State FIPS
          code was recalculated as a string and the values for Puerto Rico and
          the U.S. Virgin Islands were corrected.  A final shapefile was
          created.
        Source_Used_Citation_Abbreviation: ONETOR5004
        Process_Date: 200508

  Spatial_Data_Organization_Information:
    Direct_Spatial_Reference_Method: Point
    Point_and_Vector_Object_Information:
      SDTS_Terms_Description:
        SDTS_Point_and_Vector_Object_Type: Entity point
        Point_and_Vector_Object_Count: 46931

  Spatial_Reference_Information:
    Horizontal_Coordinate_System_Definition:
      Geographic:
        Latitude_Resolution: 0.000278
        Longitude_Resolution: 0.000278
        Geographic_Coordinate_Units: Decimal degrees
      Geodetic_Model:
        Horizontal_Datum_Name: North American Datum of 1983
        Ellipsoid_Name: GRS1980
        Semi-major_Axis: 6378137
        Denominator_of_Flattening_Ratio: 298.257222

  Entity_and_Attribute_Information:
    Detailed_Description:
      Entity_Type:
        Entity_Type_Label: Tornado touchdown point
        Entity_Type_Definition:
          The point where a violently rotating column of air, in contact with both
          the ground and with the base of a powerful thunderstorm, first made
          contact with the ground.
        Entity_Type_Definition_Source: National Atlas of the United States
      Attribute:
        Attribute_Label: Shape
        Attribute_Definition: The representation of the entity in the data.
        Attribute_Definition_Source: National Atlas of the United States
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Point
            Enumerated_Domain_Value_Definition: 1-dimensional element
            Enumerated_Domain_Value_Definition_Source: ESRI GIS software
      Attribute:
        Attribute_Label: Tornadx020
        Attribute_Definition: Internal sequence number.
        Attribute_Definition_Source: National Atlas of the United States
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 1
            Range_Domain_Maximum: 46931
      Attribute:
        Attribute_Label: Year
        Attribute_Definition: The year in which the tornado occurred.
        Attribute_Definition_Source: National Atlas of the United States
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 1950
            Range_Domain_Maximum: 2004
      Attribute:
        Attribute_Label: Num
        Attribute_Definition: The number of the tornado in the State, for a given year.
        Attribute_Definition_Source:
          National Oceanic and Atmospheric Administration, Storm Prediction
          Center
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 1
            Range_Domain_Maximum: 232
      Attribute:
        Attribute_Label: State
        Attribute_Definition: The two-digit code for the State in which the tornado touched down.
        Attribute_Definition_Source: National Atlas of the United States
        Attribute_Domain_Values:
          Codeset_Domain:
            Codeset_Name:
              Codes for the Identification of the States, the District of
              Columbia and the Outlying Areas of the United States, and
              Associated Areas; (Federal Information Processing Standard
              (FIPS) 5-2): Washington, DC, National Institute of Standards
              and Technology.
            Codeset_Source: U.S. Department of Commerce
      Attribute:
        Attribute_Label: Month
        Attribute_Definition: The month in which the tornado occurred.
        Attribute_Definition_Source: National Atlas of the United States
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 1
            Range_Domain_Maximum: 12
      Attribute:
        Attribute_Label: Day
        Attribute_Definition: The day of the month on which the tornado occurred.
        Attribute_Definition_Source: National Atlas of the United States
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 1
            Range_Domain_Maximum: 31
      Attribute:
        Attribute_Label: Date
        Attribute_Definition: The date on which the tornado occurred, in the format month/day/year.
        Attribute_Definition_Source: National Atlas of the United States
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 1/3/1950
            Range_Domain_Maximum: 12/29/2004
      Attribute:
        Attribute_Label: Tor_no
        Attribute_Definition:
          A count of tornadoes during the year.  If a tornado with evidence of
          damage lifts off and touches down again within two miles, it is
          considered the same tornado.
        Attribute_Definition_Source:
          National Oceanic and Atmospheric Administration, Storm Prediction
          Center
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 1
            Range_Domain_Maximum: 1817
      Attribute:
        Attribute_Label: No_sts
        Attribute_Definition:
          The number of States traversed by the tornado.  Note that this is not a
          count of tornadoes, it is a count of the records, in the source data
          base, associated with one tornado.
        Attribute_Definition_Source: National Oceanic and Atmospheric Administration, Storm Prediction Center
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 1
            Range_Domain_Maximum: 3
      Attribute:
        Attribute_Label: State_tor
        Attribute_Definition:
          An indication of whether the record describes a tornado that affected
          several States or only a single State.
        Attribute_Definition_Source: National Atlas of the United States
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: 0
            Enumerated_Domain_Value_Definition:
              The tornado affected more than one State, and this record describes
              the tornado?s entire path.
            Enumerated_Domain_Value_Definition_Source:
              National Oceanic and Atmospheric Administration, Storm Prediction
              Center
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: 1
            Enumerated_Domain_Value_Definition: The tornado affected only one State.
            Enumerated_Domain_Value_Definition_Source: National Atlas of the United States
      Attribute:
        Attribute_Label: Segno
        Attribute_Definition: A flag indicating the nature of the record.
        Attribute_Definition_Source: National Oceanic and Atmospheric Administration, Storm Prediction Center
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: 1
            Enumerated_Domain_Value_Definition: The record is for a tornado?s entire path.
            Enumerated_Domain_Value_Definition_Source:
              National Oceanic and Atmospheric Administration, Storm
              Prediction Center
      Attribute:
        Attribute_Label: STLAT
        Attribute_Definition: The latitude of the point where the tornado touched down.
        Attribute_Definition_Source: National Atlas of the United States
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 18.20
            Range_Domain_Maximum: 61.02
      Attribute:
        Attribute_Label: STLON
        Attribute_Definition: The West longitude of the point where the tornado touched down.
        Attribute_Definition_Source: National Atlas of the United States
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 64.90
            Range_Domain_Maximum: 163.53
      Attribute:
        Attribute_Label: SPLAT
        Attribute_Definition: The latitude of the point where the tornado lifted off.
        Attribute_Definition_Source: National Atlas of the United States
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: 0.00
            Enumerated_Domain_Value_Definition:
              The tornado lift-off point could not be differentiated from the
              touchdown point, or the tornado lift-off point is unknown.
            Enumerated_Domain_Value_Definition_Source:
              National Oceanic and Atmospheric Administration, Storm Prediction
              Center
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 18.40
            Range_Domain_Maximum: 61.02
      Attribute:
        Attribute_Label: SPLON
        Attribute_Definition: The West longitude of the point where the tornado lifted off.
        Attribute_Definition_Source: National Atlas of the United States
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: 0.00
            Enumerated_Domain_Value_Definition:
              The tornado lift-off point could not be differentiated from the
              touchdown point, or the tornado lift-off point is unknown.
            Enumerated_Domain_Value_Definition_Source:
              National Oceanic and Atmospheric Administration, Storm Prediction
              Center
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 64.90
            Range_Domain_Maximum: 163.53
      Attribute:
        Attribute_Label: LGTH
        Attribute_Definition:
          The length of the tornado track in tenths of a statute mile (146 = 14.6
          miles).   Tracks may be nonlinear, so the length may not be the same as
          the great-circle distance from the touchdown point to the lift-off
          point.
        Attribute_Definition_Source: National Oceanic and Atmospheric Administration, Storm Prediction Center
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: 0
            Enumerated_Domain_Value_Definition:
              The tornado touched down and lifted off at the same point, or the
              length of the tornado track is unknown.
            Enumerated_Domain_Value_Definition_Source:
              National Oceanic and Atmospheric Administration, Storm Prediction
              Center
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 1
            Range_Domain_Maximum: 3000
      Attribute:
        Attribute_Label: Width
        Attribute_Definition:
          For tornadoes prior to 1994, the mean tornado path width in tens of feet
          (528.00 = 5280.0 feet or 1 mile.)  This is the mean width along the
          entire track.  The minimum width is assumed to be 30 feet.  A width was
          computed for each State that a tornado affected, and the mean was
          calculated from those values.

          For tornadoes from 1994 and later, the maximum width in tens of feet.
        Attribute_Definition_Source: National Atlas of the United States
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: 0.00
            Enumerated_Domain_Value_Definition: The width of the tornado track is unknown.
            Enumerated_Domain_Value_Definition_Source: National Atlas of the United States
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 0.01
            Range_Domain_Maximum: 999.00
      Attribute:
        Attribute_Label: Fatal
        Attribute_Definition:
          The number of fatalities caused by the tornado.  Prior to 1994, the
          value 0 may indicate that the number of fatalities is unknown.
        Attribute_Definition_Source: National Oceanic and Atmospheric Administration, Storm Prediction Center
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 0
            Range_Domain_Maximum: 116
      Attribute:
        Attribute_Label: INJ
        Attribute_Definition:
          The number of injuries caused by the tornado.  Prior to 1994, the value
          0 may indicate that the number of injuries is unknown.
        Attribute_Definition_Source: National Oceanic and Atmospheric Administration, Storm Prediction Center
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 0
            Range_Domain_Maximum: 1740
      Attribute:
        Attribute_Label: Damage
        Attribute_Definition:
          For 1995 and earlier, property damage caused by the tornado, in dollars
          as indicated by a code value.  For 1996 and later, property damage
          caused by the tornado, in millions of dollars.
        Attribute_Definition_Source: National Atlas of the United States
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: 0.00
            Enumerated_Domain_Value_Definition: The amount of tornado damage is unknown.
            Enumerated_Domain_Value_Definition_Source: National Atlas of the United States
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: 1.00
            Enumerated_Domain_Value_Definition: The tornado damage was less than $50.
            Enumerated_Domain_Value_Definition_Source: National Atlas of the United States
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: 2.00
            Enumerated_Domain_Value_Definition: The tornado damage was between $50 and $499
            Enumerated_Domain_Value_Definition_Source: National Atlas of the United States
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: 3.00
            Enumerated_Domain_Value_Definition: The tornado damage was between $500 and $4,999.
            Enumerated_Domain_Value_Definition_Source: National Atlas of the United States
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: 4.00
            Enumerated_Domain_Value_Definition: The tornado damage was between $5,000 and $49,999.
            Enumerated_Domain_Value_Definition_Source: National Atlas of the United States

        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: 5.00
            Enumerated_Domain_Value_Definition: The tornado damage was between $50,000 and $499,999.
            Enumerated_Domain_Value_Definition_Source: National Atlas of the United States
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: 6.00
            Enumerated_Domain_Value_Definition: The tornado damage was between $500,000 and $4,999,999.
            Enumerated_Domain_Value_Definition_Source: National Atlas of the United States
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: 7.00
            Enumerated_Domain_Value_Definition: The tornado damage was between $5,000,000 and $49,999,999.
            Enumerated_Domain_Value_Definition_Source: National Atlas of the United States
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: 8.00
            Enumerated_Domain_Value_Definition: The tornado damage was between $50,000,000 and $4999,999,999.
            Enumerated_Domain_Value_Definition_Source: National Atlas of the United States
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: 9.00
            Enumerated_Domain_Value_Definition: The tornado damage was $500,000,000 or more.
            Enumerated_Domain_Value_Definition_Source: National Atlas of the United States
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 0.00
            Range_Domain_Maximum: 1000.00
      Attribute:
        Attribute_Label: F_Scale
        Attribute_Definition:
          The damage classification according to the Fujita Tornado Damage Scale.
          The categories are based upon the estimated maximum winds occurring
          within the funnel.  Wind estimates associated with damage are crude at
          best.  Only one classification is given for each tornado. See
           and
          
          for detailed information on the Fujita Tornado Scale.
        Attribute_Definition_Source: National Oceanic and Atmospheric Administration, Storm Prediction Center
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: -9
            Enumerated_Domain_Value_Definition: No F-Scale damage classification estimate is available.
            Enumerated_Domain_Value_Definition_Source:
              National Oceanic and Atmospheric Administration, Storm Prediction
              Center
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: 0
            Enumerated_Domain_Value_Definition:
              Estimated maximum wind speeds of 40-72 mph.  Gale Tornado.  Light
              damage: Some damage to chimneys; breaks twigs and branches off
              trees; pushes over shallow-rooted trees; damages signboards; some
              windows broken.  Winds are below hurricane force.
            Enumerated_Domain_Value_Definition_Source: National Oceanic and Atmospheric Administration
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: 1
            Enumerated_Domain_Value_Definition:
              Estimated maximum wind speeds of 73-112 mph.  Moderate Tornado.
              Moderate damage: Peels surfaces off roofs; mobile homes pushed off
              foundations or overturned; outbuildings demolished; moving autos
              pushed off the roads; trees snapped or broken.  (Hurricane wind
              speed begins at 73 mph.)
            Enumerated_Domain_Value_Definition_Source: National Oceanic and Atmospheric Administration
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: 2
            Enumerated_Domain_Value_Definition:
              Estimated maximum wind speeds of 113-157 mph.  Significant Tornado.
              Considerable damage: Roofs torn off frame houses; mobile homes
              demolished; frame houses with weak foundations lifted and moved;
              boxcars pushed over; large trees snapped or uprooted; light-object
              missiles generated.
            Enumerated_Domain_Value_Definition_Source: National Oceanic and Atmospheric Administration
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: 3
            Enumerated_Domain_Value_Definition:
              Estimated maximum wind speeds of 158-206 mph.  Severe Tornado.
              Severe damage: Roofs and some walls torn off well-constructed
              houses; trains overturned; most trees in forests uprooted; heavy
              cars lifted off the ground and thrown; weak pavement blown off
              roads.
            Enumerated_Domain_Value_Definition_Source: National Oceanic and Atmospheric Administration
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: 4
            Enumerated_Domain_Value_Definition:
              Estimated maximum wind speeds of 207-260 mph.  Devastating Tornado.
              Devastating damage: Well constructed homes leveled; structures with
              weak foundations blown off some distance; cars thrown and
              disintegrated; large missiles generated; trees in forest uprooted
              and carried some distance away.
            Enumerated_Domain_Value_Definition_Source: National Oceanic and Atmospheric Administration
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: 5
            Enumerated_Domain_Value_Definition:
              Estimated maximum wind speeds of 261-318 mph.  Incredible Tornado.
              Incredible damage: Strong frame houses lifted off foundations and
              carried considerable distance to disintegrate; automobile-sized
              missiles fly through the air in excess of 300 ft (100 m); trees
              debarked; incredible phenomena will occur.
            Enumerated_Domain_Value_Definition_Source: National Oceanic and Atmospheric Administration

  Distribution_Information:
    Distributor:
      Contact_Information:
        Contact_Organization_Primary:
          Contact_Organization: Earth Science Information Center, U.S. Geological Survey
        Contact_Address:
          Address_Type: Mailing address
          Address: 507 National Center
          City: Reston
          State_or_Province: VA
          Postal_Code: 20192
        Contact_Voice_Telephone: 1-888-ASK-USGS (1-888-275-8747)
        Contact_Voice_Telephone: 703-648-5920
        Contact_Instructions:
          In addition to the address above there are other ESIC offices
          throughout the country.  A full list of these offices is at
          .

    Distribution_Liability:
      Although these data have been processed successfully on a computer system
      at the U.S. Geological Survey, no warranty expressed or implied is made
      by the U.S. Geological Survey or the National Oceanic and Atmospheric
      Administration regarding the utility of the data on any other system, nor
      shall the act of distribution constitute any such warranty.  No
      responsibility is assumed by the U.S. Geological Survey or the National
      Oceanic and Atmospheric Administration in the use of these data.
    Standard_Order_Process:
      Digital_Form:
        Digital_Transfer_Information:
          Format_Name: ESRI Shapefile
        Digital_Transfer_Option:
          Online_Option:
            Computer_Contact_Information:
              Network_Address:
                Network_Resource_Name: 
      Digital_Form:
        Digital_Transfer_Information:
          Format_Name: SDTS
        Digital_Transfer_Option:
          Online_Option:
            Computer_Contact_Information:
              Network_Address:
                Network_Resource_Name: 
      Fees: There is no charge for the map layer.

  Metadata_Reference_Information:
    Metadata_Date: 20060619
    Metadata_Contact:
      Contact_Information:
        Contact_Person_Primary:
          Contact_Person: Peg Rawson
          Contact_Organization: National Atlas of the United States
        Contact_Address:
          Address_Type: Mailing address
          Address: 12201 Sunrise Valley Dr
          Address: MS 561
          City: Reston
          State_or_Province: VA
          Postal_Code: 20192
        Contact_Voice_Telephone: 703-648-4183
        Contact_Electronic_Mail_Address: [email protected]
    Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
    Metadata_Standard_Version: FGDC-STD-001-1998
    Metadata_Security_Information:
      Metadata_Security_Classification_System: None
      Metadata_Security_Classification: Unclassified
      Metadata_Security_Handling_Description: None