Data Access Form

Dataset Title:	RU-WRF 3km Model Winds Archive
Institution:	Rutgers University (Dataset ID: wrf-grid-archive)
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| Files \| Make a graph

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Dimensions	Size	Spacing
time (UTC)	21097	1h 7m 51s (uneven)

z (m)	4	43.33333 (uneven)

latitude (degrees_north)	324	1.0 (even)

longitude (degrees_east)	324	1.0 (even)

Grid Variables (which always also download all of the dimension variables)

eastward_wind (U-component of wind, m s-1)

northward_wind (V-component of wind, m s-1)

wind_speed (m s-1)

wind_from_direction (Wind Direction, degree)

File type: (more information)

(Documentation / Bypass this form)

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

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.4288832e+9, 1.5147612e+9;
    String axis "T";
    String calendar "gregorian";
    String ioos_category "Time";
    String long_name "Time";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  z {
    Float32 _FillValue NaN;
    Float32 actual_range 10.0, 140.0;
    String ioos_category "Location";
    String long_name "Specified height level above ground";
    String units "m";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Int16 actual_range 0, 323;
    String axis "Y";
    String ioos_category "Location";
    String long_name "Latitude";
    String source_name "y";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Int16 actual_range 0, 323;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String source_name "x";
    String standard_name "longitude";
    String units "degrees_east";
  }
  eastward_wind {
    Float32 _FillValue NaN;
    String center "US National Weather Service - NCEP (WMC)";
    Float64 colorBarMaximum 15.0;
    Float64 colorBarMinimum -15.0;
    String comment "The zonal wind speed (m/s) indicates the u (positive eastward) component of where the wind is going.";
    String forecast_time_units "hours";
    String grid_type "Lambert Conformal can be secant or tangent, conical or bipolar";
    String initial_time "12/30/2015 (00:00)";
    String ioos_category "Wind";
    String level_type "Specified height level above ground (m)";
    String long_name "U-component of wind";
    String parameter_discipline_and_category "Meteorological products, Momentum";
    Int32 parameter_template_discipline_category_number 0, 0, 2, 2;
    String production_status "Operational products";
    String standard_name "eastward_wind";
    String units "m s-1";
  }
  northward_wind {
    Float32 _FillValue NaN;
    String center "US National Weather Service - NCEP (WMC)";
    Float64 colorBarMaximum 15.0;
    Float64 colorBarMinimum -15.0;
    String comment "The meridional wind speed (m/s) indicates the v (positive northward) component of where the wind is going.";
    String forecast_time_units "hours";
    String grid_type "Lambert Conformal can be secant or tangent, conical or bipolar";
    String initial_time "12/30/2015 (00:00)";
    String ioos_category "Wind";
    String level_type "Specified height level above ground (m)";
    String long_name "V-component of wind";
    String parameter_discipline_and_category "Meteorological products, Momentum";
    Int32 parameter_template_discipline_category_number 0, 0, 2, 3;
    String production_status "Operational products";
    String standard_name "northward_wind";
    String units "m s-1";
  }
  wind_speed {
    Float32 _FillValue NaN;
    Float64 colorBarMaximum 30.0;
    Float64 colorBarMinimum 0.0;
    String colorBarPalette "LightRainbow";
    String comment "Wind Speed is calculated from the Zonal and Meridional wind speeds.";
    String ioos_category "Wind";
    String long_name "Wind Speed";
    String standard_name "wind_speed";
    String units "m s-1";
  }
  wind_from_direction {
    Float32 _FillValue NaN;
    Float64 colorBarMaximum 360.0;
    Float64 colorBarMinimum 0.0;
    String comment "The direction from which winds are coming from, in degrees clockwise from true N.";
    String ioos_category "Wind";
    String long_name "Wind Direction";
    String standard_name "wind_from_direction";
    String units "degree";
  }
  NC_GLOBAL {
    String _NCProperties "version=1|netcdflibversion=4.6.1|hdf5libversion=1.10.2";
    String cdm_data_type "Grid";
    String Conventions "CF-1.6, COARDS, ACDD-1.3";
    String creator_email "sage@marine.rutgers.edu";
    String creator_name "Sage Lichtenwalner";
    String creator_type "group";
    String creator_url "https://rucool.marine.rutgers.edu";
    String date_created "2018-10-29 16:29:20.083760";
    Float64 Easternmost_Easting 323.0;
    String elapsed_time "0:00:03.744679";
    Float64 forecast_offset 6;
    Float64 geospatial_lat_max 323.0;
    Float64 geospatial_lat_min 0.0;
    Float64 geospatial_lat_resolution 1.0;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 323.0;
    Float64 geospatial_lon_min 0.0;
    Float64 geospatial_lon_resolution 1.0;
    String geospatial_lon_units "degrees_east";
    String history 
"2024-04-25T04:48:24Z (local files)
2024-04-25T04:48:24Z http://ruwrf-archive.marine.rutgers.edu/erddap/griddap/wrf-grid-archive.das";
    String infoUrl "https://rucool.marine.rutgers.edu/ruwrf-mesoscale-meteorological-model-forecast";
    String institution "Rutgers University";
    String keywords "3km, atmosphere, atmospheric, component, cool, data, direction, earth, Earth Science > Atmosphere > Atmospheric Winds > Surface Winds, eastward, eastward_wind, forecasting, model, northward, northward_wind, output, research, rutgers, science, speed, surface, time, u-component, v-component, weather, wind, wind_from_direction, wind_speed, winds, wrf";
    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 323.0;
    String project "RU COOL BPU Wind Energy Project";
    String source_directory "/home/bowers/output/grib/3km/";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 0.0;
    String standard_name_vocabulary "CF Standard Name Table v29";
    String summary "Wind data extracted from the RU-Weather Research and Forecasting Model (WRF) model.  The model is run daily at 00Z with forecast files saved every hour.  Times in this file are UTC based on the forecast time.  The forecast_offset specifies how many hours of model spin up are allowed before the data is included in this virtual time-series archive for a given day.  For example, a value of 6 means the first 6 hours of data for a day are actually extracted from the previous day's model run.";
    String time_coverage_end "2017-12-31T23:00:00Z";
    String time_coverage_start "2015-04-13T00:00:00Z";
    String title "RU-WRF 3km Model Winds Archive";
    Float64 Westernmost_Easting 0.0;
  }
}

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griddap lets you request a data subset, graph, or map from a gridded dataset (for example, sea surface temperature data from a satellite), via a specially formed URL. griddap uses the OPeNDAP (external link)

Data Access Protocol (DAP) (external link)

and its projection 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. It makes the URL for you.
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(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.

griddap request URLs must be in the form
https://coastwatch.pfeg.noaa.gov/erddap/griddap/datasetID.fileType{?query}
For example,
https://coastwatch.pfeg.noaa.gov/erddap/griddap/jplMURSST.htmlTable?analysed_sst[(2015-06-09T09:00:00Z)][(-89.9945):1000:(89.9945)][(-179.995):1000:(179.995)]
Thus, the query is often a data variable name (e.g., analysed_sst), followed by [(start):stride:(stop)] (or a shorter variation of that) for each of the variable's dimensions (for example, [time][latitude][longitude]).

For details, see the griddap Documentation.