Data Access Form

Dataset Title:	WRF LaMMA 2026111218 Dewpoint_temperature_2m (LatLon)
Institution:	Consorzio LaMMA (Dataset ID: wrfFile_2026111218_Dewpoint_temperature_2m_latlon)
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| Files \| Make a graph

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Dimensions	Size	Spacing
time (UTC)	49	1h 0m 0s (even)

height (m)	1	(just one value)

latitude (degrees_north)	942	0.02060379 (even)

longitude (degrees_east)	1404	0.02060379 (even)

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

td2m (2 metre dewpoint temperature, K)

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 {
    UInt32 _ChunkSizes 512;
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.7945064e+9, 1.7946792e+9;
    String axis "T";
    String calendar "proleptic_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";
  }
  height {
    UInt32 _ChunkSizes 1;
    Float64 actual_range 2.0, 2.0;
    String axis "Z";
    String ioos_category "Location";
    String long_name "height";
    String positive "up";
    String standard_name "height";
    String units "m";
  }
  latitude {
    UInt32 _ChunkSizes 942;
    String _CoordinateAxisType "Lat";
    Float64 actual_range 30.99840338818192, 50.386570612029836;
    String axis "Y";
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    UInt32 _ChunkSizes 1404;
    String _CoordinateAxisType "Lon";
    Float64 actual_range -3.451134973426701, 25.45598363981307;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  td2m {
    UInt32 _ChunkSizes 1, 1, 942, 1404;
    Float32 _FillValue 9.96921e+36;
    Float64 colorBarMaximum 300.0;
    Float64 colorBarMinimum 250.0;
    String colorBarPalette "Rainbow";
    String ioos_category "Temperature";
    String long_name "2 metre dewpoint temperature";
    Float32 missing_value 9.96921e+36;
    String param "6.0.0";
    String units "K";
  }
  NC_GLOBAL {
    String _NCProperties "version=2,netcdf=4.9.3,hdf5=1.14.5";
    String CDI "Climate Data Interface version 2.5.1 (https://mpimet.mpg.de/cdi)";
    String cdm_data_type "Grid";
    String CDO "Climate Data Operators version 2.5.1 (https://mpimet.mpg.de/cdo)";
    String Conventions "CF-1.10, COARDS, ACDD-1.3";
    String creator_name "Consorzio LaMMA";
    String creator_type "institution";
    String creator_url "https://www.lamma.toscana.it/";
    Float64 Easternmost_Easting 25.45598363981307;
    String GDAL "GDAL 3.13.2 \"Iowa City\", released 2026/07/20";
    String GDAL_NETCDF_DIM_EXTRA "{time,height}";
    Int32 GDAL_NETCDF_DIM_height_DEF 1, 6;
    Int32 GDAL_NETCDF_DIM_height_VALUES 2;
    Int32 GDAL_NETCDF_DIM_time_DEF 1, 6;
    Int32 GDAL_NETCDF_DIM_time_VALUES 48;
    Float64 geospatial_lat_max 50.386570612029836;
    Float64 geospatial_lat_min 30.99840338818192;
    Float64 geospatial_lat_resolution 0.02060379088612956;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 25.45598363981307;
    Float64 geospatial_lon_min -3.451134973426701;
    Float64 geospatial_lon_resolution 0.02060379088612956;
    String geospatial_lon_units "degrees_east";
    String history 
"Fri Nov 13 04:10:10 2026: ncatted -O -a _FillValue,td2m,o,f,9.96921e36 -a missing_value,td2m,o,f,9.96921e36 /DATA/wrf_file_datasets/tmp/td2m_single_level_latlon_rebuild/Dewpoint_temperature_2m_2026111218_2026111418_latlon.nc
Fri Nov 13 04:10:10 2026: ncks -A -v time /DATA/wrf_file_datasets/tmp/td2m_single_level_latlon_rebuild/Dewpoint_temperature_2m_2026111218_2026111418_lcc_georef.nc /DATA/wrf_file_datasets/tmp/td2m_single_level_latlon_rebuild/with_time_td2m.nc
Fri Nov 13 04:10:10 2026: ncrename -v .record,time /DATA/wrf_file_datasets/tmp/td2m_single_level_latlon_rebuild/with_time_td2m.nc
Fri Nov 13 04:10:10 2026: ncrename -d record,time /DATA/wrf_file_datasets/tmp/td2m_single_level_latlon_rebuild/with_time_td2m.nc
Fri Nov 13 04:10:10 2026: ncecat -O /DATA/wrf_file_datasets/tmp/td2m_single_level_latlon_rebuild/with_lev_td2m.nc /DATA/wrf_file_datasets/tmp/td2m_single_level_latlon_rebuild/with_time_td2m.nc
Fri Nov 13 04:10:10 2026: ncks -A -v height /DATA/wrf_file_datasets/tmp/td2m_single_level_latlon_rebuild/Dewpoint_temperature_2m_2026111218_2026111418_lcc_georef.nc /DATA/wrf_file_datasets/tmp/td2m_single_level_latlon_rebuild/with_lev_td2m.nc
Fri Nov 13 04:10:10 2026: ncrename -v .record,height /DATA/wrf_file_datasets/tmp/td2m_single_level_latlon_rebuild/with_lev_td2m.nc
Fri Nov 13 04:10:10 2026: ncrename -d record,height /DATA/wrf_file_datasets/tmp/td2m_single_level_latlon_rebuild/with_lev_td2m.nc
Fri Nov 13 04:10:10 2026: ncecat -O /DATA/wrf_file_datasets/tmp/td2m_single_level_latlon_rebuild/reprojected_td2m.nc /DATA/wrf_file_datasets/tmp/td2m_single_level_latlon_rebuild/with_lev_td2m.nc
Fri Nov 13 04:10:10 2026: ncatted -O -a _FillValue,td2m,o,f,9.96921e36 -a missing_value,td2m,o,f,9.96921e36 /DATA/wrf_file_datasets/tmp/td2m_single_level_latlon_rebuild/reprojected_td2m.nc
Fri Nov 13 04:10:10 2026: ncatted -O -a grid_mapping,td2m,d,, /DATA/wrf_file_datasets/tmp/td2m_single_level_latlon_rebuild/reprojected_td2m.nc
Fri Nov 13 04:10:10 2026: ncrename -v .Band1,td2m /DATA/wrf_file_datasets/tmp/td2m_single_level_latlon_rebuild/reprojected_td2m.nc
Fri Nov 13 04:10:10 2026: GDAL CreateCopy( /DATA/wrf_file_datasets/tmp/td2m_single_level_latlon_rebuild/in_td2m.nc, ... )
Fri Nov 13 04:10:09 2026: ncatted -O -a _FillValue,td2m,o,f,9.96921e36 -a missing_value,td2m,o,f,9.96921e36 /DATA/wrf_file_datasets/tmp/td2m_single_level_latlon_rebuild/Dewpoint_temperature_2m_2026111218_2026111418_lcc_georef.nc
Fri Nov 13 04:10:09 2026: GDAL CreateCopy( /DATA/wrf_file_datasets/tmp/td2m_single_level_latlon_rebuild/Dewpoint_temperature_2m_2026111218_2026111418_lcc_georef.nc, ... )
Fri Nov 13 04:10:09 2026: ncatted -O -a _FillValue,td2m,o,f,9.96921e36 -a missing_value,td2m,o,f,9.96921e36 /DATA/wrf_file_datasets/tmp/td2m_single_level_latlon_rebuild/raw_td2m_lcc.nc
Fri Nov 13 04:10:09 2026: ncrename -v 2d,td2m /DATA/wrf_file_datasets/tmp/td2m_single_level_latlon_rebuild/raw_td2m_lcc.nc
Fri Nov 13 04:10:09 2026: cdo -f nc copy -seltimestep,1 -selname,2d /DATA/DATI_WRF/2026111218/wrfout_d01_2026-11-14_18_00_00.grib2 /DATA/wrf_file_datasets/tmp/td2m_single_level_latlon_rebuild/raw_td2m_lcc.nc
2026-11-15T00:02:04Z (local files)
2026-11-15T00:02:04Z https://erddap.lamma.toscana.it/erddap/griddap/wrfFile_2026111218_Dewpoint_temperature_2m_latlon.das";
    String history_of_appended_files 
"Fri Nov 13 04:10:10 2026: Appended file /DATA/wrf_file_datasets/tmp/td2m_single_level_latlon_rebuild/Dewpoint_temperature_2m_2026111218_2026111418_lcc_georef.nc had following \"history\" attribute:
Fri Nov 13 04:10:09 2026: ncatted -O -a _FillValue,td2m,o,f,9.96921e36 -a missing_value,td2m,o,f,9.96921e36 /DATA/wrf_file_datasets/tmp/td2m_single_level_latlon_rebuild/Dewpoint_temperature_2m_2026111218_2026111418_lcc_georef.nc
Fri Nov 13 04:10:09 2026: GDAL CreateCopy( /DATA/wrf_file_datasets/tmp/td2m_single_level_latlon_rebuild/Dewpoint_temperature_2m_2026111218_2026111418_lcc_georef.nc, ... )
Fri Nov 13 04:10:09 2026: ncatted -O -a _FillValue,td2m,o,f,9.96921e36 -a missing_value,td2m,o,f,9.96921e36 /DATA/wrf_file_datasets/tmp/td2m_single_level_latlon_rebuild/raw_td2m_lcc.nc
Fri Nov 13 04:10:09 2026: ncrename -v 2d,td2m /DATA/wrf_file_datasets/tmp/td2m_single_level_latlon_rebuild/raw_td2m_lcc.nc
Fri Nov 13 04:10:09 2026: cdo -f nc copy -seltimestep,1 -selname,2d /DATA/DATI_WRF/2026111218/wrfout_d01_2026-11-14_18_00_00.grib2 /DATA/wrf_file_datasets/tmp/td2m_single_level_latlon_rebuild/raw_td2m_lcc.nc
Fri Nov 13 04:10:10 2026: Appended file /DATA/wrf_file_datasets/tmp/td2m_single_level_latlon_rebuild/Dewpoint_temperature_2m_2026111218_2026111418_lcc_georef.nc had following \"history\" attribute:
Fri Nov 13 04:10:09 2026: ncatted -O -a _FillValue,td2m,o,f,9.96921e36 -a missing_value,td2m,o,f,9.96921e36 /DATA/wrf_file_datasets/tmp/td2m_single_level_latlon_rebuild/Dewpoint_temperature_2m_2026111218_2026111418_lcc_georef.nc
Fri Nov 13 04:10:09 2026: GDAL CreateCopy( /DATA/wrf_file_datasets/tmp/td2m_single_level_latlon_rebuild/Dewpoint_temperature_2m_2026111218_2026111418_lcc_georef.nc, ... )
Fri Nov 13 04:10:09 2026: ncatted -O -a _FillValue,td2m,o,f,9.96921e36 -a missing_value,td2m,o,f,9.96921e36 /DATA/wrf_file_datasets/tmp/td2m_single_level_latlon_rebuild/raw_td2m_lcc.nc
Fri Nov 13 04:10:09 2026: ncrename -v 2d,td2m /DATA/wrf_file_datasets/tmp/td2m_single_level_latlon_rebuild/raw_td2m_lcc.nc
Fri Nov 13 04:10:09 2026: cdo -f nc copy -seltimestep,1 -selname,2d /DATA/DATI_WRF/2026111218/wrfout_d01_2026-11-14_18_00_00.grib2 /DATA/wrf_file_datasets/tmp/td2m_single_level_latlon_rebuild/raw_td2m_lcc.nc
";
    String infoUrl "https://www.lamma.toscana.it/";
    String institution "Consorzio LaMMA";
    String keywords "2 metre dewpoint temperature, forecast, LaMMA, td2m, 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.";
    String NCO "netCDF Operators version 5.3.3 (Homepage = http://nco.sf.net, Code = https://github.com/nco/nco, Citation = 10.1016/j.envsoft.2008.03.004)";
    Float64 Northernmost_Northing 50.386570612029836;
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 30.99840338818192;
    String summary "Modello WRF d01 del Consorzio LaMMA, run 20261112 18 UTC: 2 metre dewpoint temperature (td2m) in proiezione LatLon, un file per istante di previsione.";
    String time_coverage_end "2026-11-14T18:00:00Z";
    String time_coverage_start "2026-11-12T18:00:00Z";
    String title "WRF LaMMA 2026111218 Dewpoint_temperature_2m (LatLon)";
    Float64 Westernmost_Easting -3.451134973426701;
    String wrf_projection "LatLon";
    String wrf_run "2026111218";
  }
}

Using griddap to Request Data and Graphs from Gridded Datasets

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.
(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.

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/jplMURSST41.htmlTable?analysed_sst[(2002-06-01T09:00:00Z)][(-89.99):1000:(89.99)][(-179.99):1000:(180.0)]
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.