Make A Graph

Dataset Title:	HURDAT2_NATLN 2021_PRESENT
Institution:	NOAA (Dataset ID: HURDAT2_NATLN_2021_PRESENT)
Range:	longitude = -136.9 to 8.0°E, latitude = 7.0 to 64.0°N, time = 2021-05-20T00:00:00Z to 2024-11-18T01:00:00Z
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| Subset \| Data Access Form \| Files

To work correctly, this web page requires that JavaScript be enabled in your browser. Please:
1) Enable JavaScript in your browser:
      • Chrome: "Settings : Advanced : Privacy and security : Site Settings : JavaScript"
      • Firefox: (it should be always on!)"
      • Opera: "Settings : Websites : JavaScript"
      • Safari: "Safari : Preferences : Security : Enable JavaScript"
2) Reload this web page.

Graph Type:

X Axis:

Y Axis:

Color:

Constraints

Optional
Constraint #1

Optional
Constraint #2

Server-side Functions

distinct()

Hover here to see a list of options. Click on an option to select it.

Graph Settings

Marker Type:

Size:

Color:

Color Bar:

Continuity:

Scale:

Minimum:

Maximum:

N Sections:

Draw land mask:

Y Axis Minimum:

Maximum:

(Please be patient. It may take a while to get the data.)

Optional:
Then set the File Type: (File Type information)
and

or view the URL:
(Documentation / Bypass this form

)

Click on the map to specify a new center point.

Zoom:

Time range:

[The graph you specified. Please be patient.]

Things You Can Do With Your Graphs

Well, you can do anything you want with your graphs, of course. But some things you might not have considered are:

Web page authors can embed a graph of the latest data in a web page using HTML <img> tags.
Anyone can use ERDDAPs Slide Sorter to build a personal web page that displays graphs with the latest data (or other images or HTML content), each in its own, draggable slide.

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  storm_identifier {
    String comment "The Automated Tropical Cyclone Forecasting System (ATCF) storm identifier is an 8 character string which identifies a tropical cyclone. The storm identifier has the form BBCCYYYY, where BB is the ocean basin, specifically: AL - North Atlantic basin, north of the Equator; SL - South Atlantic basin, south of the Equator; EP - North East Pacific basin, eastward of 140 degrees west longitude; CP - North Central Pacific basin, between the dateline and 140 degrees west longitude; WP - North West Pacific basin, westward of the dateline; IO - North Indian Ocean basin, north of the Equator between 40 and 100 degrees east longitude; SH - South Pacific Ocean basin and South Indian Ocean basin. CC is the cyclone number. Numbers 01 through 49 are reserved for tropical and subtropical cyclones. A cyclone number is assigned to each tropical or subtropical cyclone in each basin as it develops. Numbers are assigned in chronological order. Numbers 50 through 79 are reserved for internal use by operational forecast centers. Numbers 80 through 89 are reserved for training, exercises and testing. Numbers 90 through 99 are reserved for tropical disturbances having the potential to become tropical or subtropical cyclones. The 90's are assigned sequentially and reused throughout the calendar year. YYYY is the four-digit year. This is calendar year for the northern hemisphere. For the southern hemisphere, the year begins July 1, with calendar year plus one";
    String ioos_category "Identifier";
    String long_name "Automated Tropical Cyclone Forecasting System Storm Identifier";
    String standard_name "automated_tropical_cyclone_forecasting_system_storm_identifier";
  }
  tropical_cyclone_name {
    String comment "Tropical cyclones were not formally named before 1950 and are thus referred to as “UNNAMED” in the database. Systems that were added into the database after the season (such as AL20 in 2011) also are considered “UNNAMED”. Non-developing tropical depressions formally were given names (actually numbers, such as “TEN”) that were included into the ATCF b-decks starting in 2003. Non-developing tropical depressions before this year are also referred to as “UNNAMED”";
    String ioos_category "Unknown";
    String long_name "Tropical Cyclone Name";
    String standard_name "tropical_cyclone_name";
  }
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.6214688e+9, 1.7318916e+9;
    String axis "T";
    String calendar "gregorian";
    String comment "Seconds since 1970-01-01T00:00:00Z";
    String ioos_category "Time";
    String long_name "Time";
    String observation_type "measured";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  record_identifier {
    String comment "Record Identifier. C: Closest approach to a coast, not fallowed by landfall, G: Genesis, I: An intensity peak in terms of both pressure and wind, L: Landfall - Center of system crossing a coastline, P: Minimum in central pressure, R: Provides additional detail on the intensity of the cyclone when rapid changes are underway, S: Change of status of the system, T: Provides additional detail on the intensity of the cyclone when rapid changes are underway, U: Unknown";
    String ioos_category "Identifier";
    String long_name "Record Identifier";
    String standard_name "record_identifier";
  }
  status_of_system {
    String comment "Status of System. Options are: TD-Tropical cyclone of tropical depression intensity (< 34 knots), TS-Tropical cyclone of tropical storm intensity (34-63 knots), HU-Tropical cyclone of hurricane intensity (>= 64 knots), EX-Extratropical cyclone (of any intensity), SD-Subtropical cyclone of subtropical depression intensity (< 34 knots), SS-Subtropical cyclone of subtropical storm intensity (>= 34 knots), LO-A low that is neither a tropical cyclone, a subtropical cyclone, nor an extratropical cyclone (of any intensity), WV-Tropical Wave (of any intentisy), DB-Disturbance (of any intensity), UU-Unknown";
    String ioos_category "Unknown";
    String long_name "Status of System";
    String standard_name "status_of_system";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 _FillValue -999.0;
    Float64 actual_range 7.0, 64.0;
    String axis "Y";
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String comment "Latitude of Observation";
    String ioos_category "Location";
    String long_name "Latitude";
    String observation_type "measured";
    String standard_name "latitude";
    String units "degrees_north";
    Float64 valid_max 90.0;
    Float64 valid_min -90.0;
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 _FillValue -999.0;
    Float64 actual_range -136.9, 8.0;
    String axis "X";
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String comment "Longitude of Observation";
    String ioos_category "Location";
    String long_name "Longitude";
    String observation_type "measured";
    String standard_name "longitude";
    String units "degrees_east";
    Float64 valid_max 180.0;
    Float64 valid_min -180.0;
  }
  maximum_sustained_wind {
    Float64 _FillValue -999.0;
    Float64 actual_range 7.717, 79.739;
    String comment "Maximum sustained wind speed of a tropical cyclone, sustained over a period of one minute at the surface of the earth";
    String ioos_category "Wind";
    String long_name "Tropical Cyclone Maximun Sustained Wind Speed";
    String observation_type "measured";
    String standard_name "tropical_cyclone_maximum_sustained_wind_speed";
    String units "m s-1";
  }
  minimum_pressure {
    Float64 _FillValue -999.0;
    Float64 actual_range 89500.0, 101600.0;
    Float64 colorBarMaximum 105000.0;
    Float64 colorBarMinimum 95000.0;
    String comment "Tropical Cyclone Minimum Pressure";
    String ioos_category "Pressure";
    String long_name "Minimum Pressure";
    String observation_type "measured";
    String standard_name "air_pressure";
    String units "Pa";
  }
  wind_radii_northeastern_34kt {
    Float64 _FillValue -999.0;
    Float64 actual_range 0.0, 1055640.0;
    String comment "34 kt wind radii maximum extent in northeastern quadrant";
    String ioos_category "Wind";
    String long_name "34 kt wind radii maximum extent in northeastern quadrant";
    String observation_type "measured";
    String standard_name "wind_radii_northeastern_34kt";
    String units "m";
  }
  wind_radii_southeastern_34kt {
    Float64 _FillValue -999.0;
    Float64 actual_range 0.0, 1333440.0;
    String comment "34 kt wind radii maximum extent in southeastern quadrant";
    String ioos_category "Wind";
    String long_name "34 kt wind radii maximum extent in southeastern quadrant";
    String observation_type "measured";
    String standard_name "wind_radii_southeastern_34kt";
    String units "m";
  }
  wind_radii_southwestern_34kt {
    Float64 _FillValue -999.0;
    Float64 actual_range 0.0, 1222320.0;
    String comment "34 kt wind radii maximum extent in southwestern quadrant";
    String ioos_category "Wind";
    String long_name "34 kt wind radii maximum extent in southwestern quadrant";
    String observation_type "measured";
    String standard_name "wind_radii_southwestern_34kt";
    String units "m";
  }
  wind_radii_northwestern_34kt {
    Float64 _FillValue -999.0;
    Float64 actual_range 0.0, 1000080.0;
    String comment "34 kt wind radii maximum extent in northwestern quadrant";
    String ioos_category "Wind";
    String long_name "34 kt wind radii maximum extent in northwestern quadrant";
    String observation_type "measured";
    String standard_name "wind_radii_northwestern_34kt";
    String units "m";
  }
  wind_radii_northeastern_50kt {
    Float64 _FillValue -999.0;
    Float64 actual_range 0.0, 555600.0;
    String comment "50 kt wind radii maximum extent in northeastern quadrant";
    String ioos_category "Wind";
    String long_name "50 kt wind radii maximum extent in northeastern quadrant";
    String observation_type "measured";
    String standard_name "wind_radii_northeastern_50kt";
    String units "m";
  }
  wind_radii_southeastern_50kt {
    Float64 _FillValue -999.0;
    Float64 actual_range 0.0, 444480.0;
    String comment "50 kt wind radii maximum extent in southeastern quadrant";
    String ioos_category "Wind";
    String long_name "50 kt wind radii maximum extent in southeastern quadrant";
    String observation_type "measured";
    String standard_name "wind_radii_southeastern_50kt";
    String units "m";
  }
  wind_radii_souththwestern_50kt {
    Float64 _FillValue -999.0;
    Float64 actual_range 0.0, 666720.0;
    String comment "50 kt wind radii maximum extent in souththwestern quadrant";
    String ioos_category "Wind";
    String long_name "50 kt wind radii maximum extent in souththwestern quadrant";
    String observation_type "measured";
    String standard_name "wind_radii_souththwestern_50kt";
    String units "m";
  }
  wind_radii_northwestern_50kt {
    Float64 _FillValue -999.0;
    Float64 actual_range 0.0, 370400.0;
    String comment "50 kt wind radii maximum extent in northwestern quadrant";
    String ioos_category "Wind";
    String long_name "50 kt wind radii maximum extent in northwestern quadrant";
    String observation_type "measured";
    String standard_name "wind_radii_northwestern_50kt";
    String units "m";
  }
  wind_radii_northeastern_64kt {
    Float64 _FillValue -999.0;
    Float64 actual_range 0.0, 203720.0;
    String comment "64 kt wind radii maximum extent in northeastern quadrant";
    String ioos_category "Wind";
    String long_name "64 kt wind radii maximum extent in northeastern quadrant";
    String observation_type "measured";
    String standard_name "wind_radii_northeastern_64kt";
    String units "m";
  }
  wind_radii_souththeastern_64kt {
    Float64 _FillValue -999.0;
    Float64 actual_range 0.0, 296320.0;
    String comment "64 kt wind radii maximum extent in souththeastern quadrant";
    String ioos_category "Wind";
    String long_name "64 kt wind radii maximum extent in souththeastern quadrant";
    String observation_type "measured";
    String standard_name "wind_radii_souththeastern_64kt";
    String units "m";
  }
  wind_radii_southwestern_64kt {
    Float64 _FillValue -999.0;
    Float64 actual_range 0.0, 222240.0;
    String comment "64 kt wind radii maximum extent in southwestern quadrant";
    String ioos_category "Wind";
    String long_name "64 kt wind radii maximum extent in southwestern quadrant";
    String observation_type "measured";
    String standard_name "wind_radii_southwestern_64kt";
    String units "m";
  }
  wind_radii_northwestern_64kt {
    Float64 _FillValue -999.0;
    Float64 actual_range 0.0, 185200.0;
    String comment "64 kt wind radii maximum extent in northwestern quadrant";
    String ioos_category "Wind";
    String long_name "64 kt wind radii maximum extent in northwestern quadrant";
    String observation_type "measured";
    String standard_name "wind_radii_northwestern_64kt";
    String units "m";
  }
  radius_of_maximum_wind {
    Float32 _FillValue -999.0;
    Float32 actual_range 9260.0, 740800.0;
    String comment "The great circle distance measured from the tropical cyclone center to the region of sustained 1-minute duration maximum wind speed, as defined by the standard name, tropical_cyclone_maximum_sustained_wind_speed.";
    String ioos_category "Wind";
    String long_name "Radius of Maximum Wind";
    String observation_type "measured";
    String standard_name "radius_of_tropical_cyclone_maximum_sustained_wind_speed";
    String units "m";
  }
 }
  NC_GLOBAL {
    String acknowledgement "This project is funded by the National Oceanic and Atmospheric Administration (NOAA)";
    String cdm_data_type "Point";
    String comment "These data were originally identified in the revised Atlantic hurricane database HURDAT2";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    String creator_email "Sandra.Bringas-at-noaa.gov";
    String creator_name "Sandra Bringas";
    String creator_type "person";
    String creator_url "https://www.noaa.gov/";
    Float64 Easternmost_Easting 8.0;
    String featureType "Point";
    Float64 geospatial_lat_max 64.0;
    Float64 geospatial_lat_min 7.0;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 8.0;
    Float64 geospatial_lon_min -136.9;
    String geospatial_lon_units "degrees_east";
    String history 
"2025-04-30T05:45:30Z (local files)
2025-04-30T05:45:30Z https://erddap.aoml.noaa.gov/hdb/tabledap/HURDAT2_NATLN_2021_PRESENT.das";
    String infoUrl "https://www.noaa.gov/";
    String institution "NOAA";
    String keywords "34kt, 50kt, 64kt, air, air_pressure, atmosphere, atmospheric, automated, automated_tropical_cyclone_forecasting_system_storm_identifier, cyclone, data, earth, Earth Science > Atmosphere > Atmospheric Pressure > Atmospheric Pressure Measurements, Earth Science > Atmosphere > Atmospheric Pressure > Sea Level Pressure, Earth Science > Atmosphere > Atmospheric Pressure > Static Pressure, extent, forecasting, hurdat2, identifier, latitude, level, longitude, maximum, maximum_sustained_wind, maximun, measurements, minimum, minimum_pressure, name, natln, noaa, northeastern, northwestern, pressure, quadrant, radii, radius, radius_of_maximum_wind, radius_of_tropical_cyclone_maximum_sustained_wind_speed, record, record_identifier, science, sea, southeastern, souththeastern, souththwestern, southwestern, speed, static, status, status_of_system, storm, storm_identifier, sustained, system, time, tropical, tropical_cyclone_maximum_sustained_wind_speed, tropical_cyclone_name, wind, wind_radii_northeastern_34kt, wind_radii_northeastern_50kt, wind_radii_northeastern_64kt, wind_radii_northwestern_34kt, wind_radii_northwestern_50kt, wind_radii_northwestern_64kt, wind_radii_southeastern_34kt, wind_radii_southeastern_50kt, wind_radii_souththeastern_64kt, wind_radii_souththwestern_50kt, wind_radii_southwestern_34kt, wind_radii_southwestern_64kt";
    String keywords_vocabulary "GCMD Science Keywords";
    String license 
"The data may be used and redistributed for free but is not intended
for legal use, since it may contain inaccuracies. Neither the data
Contributor, ERD, NOAA, nor the United States Government, nor any
of their employees or contractors, makes any warranty, express or
implied, including warranties of merchantability and fitness for a
particular purpose, or assumes any legal liability for the accuracy,
completeness, or usefulness, of this information.";
    Float64 Northernmost_Northing 64.0;
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 7.0;
    String standard_name_vocabulary "CF Standard Name Table v70";
    String subsetVariables "storm_identifier, tropical_cyclone_name, record_identifier, wind_radii_souththwestern_50kt, wind_radii_northeastern_64kt, wind_radii_souththeastern_64kt, wind_radii_southwestern_64kt, wind_radii_northwestern_64kt";
    String summary "These data were originally identified in the revised Atlantic hurricane database HURDAT2";
    String time_coverage_end "2024-11-18T01:00:00Z";
    String time_coverage_start "2021-05-20T00:00:00Z";
    String title "HURDAT2_NATLN 2021_PRESENT";
    Float64 Westernmost_Easting -136.9;
  }
}

Using tabledap to Request Data and Graphs from Tabular Datasets

tabledap lets you request a data subset, a graph, or a map from a tabular dataset (for example, buoy data), via a specially formed URL. tabledap uses the OPeNDAP (external link)

Data Access Protocol (DAP) (external link)

and its selection constraints (external link)

The URL specifies what you want: the dataset, a description of the graph or the subset of the data, and the file type for the response.

(easy) You can get data by using the dataset's Data Access Form or Subset form. They make the URL for you.
(easy) You can make a graph or map by using the dataset's Make A Graph form. It makes the URL for you.
(not hard) You can bypass the forms and get the data or make a graph or map by generating the URL by hand or with a computer program or script.

Tabledap request URLs must be in the form
https://coastwatch.pfeg.noaa.gov/erddap/tabledap/datasetID.fileType{?query}
For example,
https://coastwatch.pfeg.noaa.gov/erddap/tabledap/pmelTaoDySst.htmlTable?longitude,latitude,time,station,wmo_platform_code,T_25&time>=2015-05-23T12:00:00Z&time<=2015-05-31T12:00:00Z
Thus, the query is often a comma-separated list of desired variable names, followed by a collection of constraints (e.g., variable<value), each preceded by '&' (which is interpreted as "AND").

For details, see the tabledap Documentation.