NCDC TD3505 Integrated Surface Hourly Data

This worldwide collection of surface weather observations is produced at the National Climatic Data Center (NCDC) from NCDC Surface Airway Hourly Observations (TD3280), U.S.A.F. DATSAV3 Surface Hourly Observations (TD9956), and NCDC Cooperative Hourly Precipitation (TD3240). Observations are all in the same ASCII format.

Mandatory data includes pressure, temperature, dew-point, visibility, sky condition,
and wind observation, but there may also be additional data,
data remarks, or data element quality sections.
The earliest data is for 1901.  The earliest years have the least volume of data, a few hundred megabytes;
the volume in the 1950s-early 1960s increased by a factor of 10-20; 1965-1972 shows a decrease because of a loss of data;
beginning in 1973 with about 5 gigabytes of data, volume has gradually increased to about 20 gigabytes per year.
There are now about 10,000 active stations.

To Access Resource:

Questions? Email Resource Support Contact:

  • datahelp@ucar.edu

Temporal Range

  • Begin:  1901-01-01
    End:  2011-12-31

Keywords

Resource Type dataset
Temporal Range Begin 1901-01-01
Temporal Range End 2011-12-31
Temporal Resolution N/A
Bounding Box North Lat N/A
Bounding Box South Lat N/A
Bounding Box West Long N/A
Bounding Box East Long N/A
Spatial Representation N/A
Spatial Resolution N/A
Related Links N/A
Additional Information N/A
Resource Format NCDC ISD
Standardized Resource Format OTHER
Asset Size 503594.614 MB
Legal Constraints

Creative Commons Attribution 4.0 International License
Access Constraints None
Software Implementation Language N/A

Resource Support Name N/A
Resource Support Email datahelp@ucar.edu
Resource Support Organization N/A
Distributor NSF NCAR Geoscience Data Exchange
Metadata Contact Name N/A
Metadata Contact Email datahelp@ucar.edu
Metadata Contact Organization NSF NCAR Geoscience Data Exchange

Author National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
Air Force Combat Climatology Center, U.S. Air Force, U.S. Department of Defense
557th Weather Wing, U.S. Air Force, U. S. Department of Defense
Publisher NSF National Center for Atmospheric Research
Publication Date 2005-01-05
Digital Object Identifier (DOI) Not Assigned
Alternate Identifier d463003
Resource Version N/A
Topic Category climatologyMeteorologyAtmosphere
Progress completed
Metadata Date 2025-10-09T01:24:45Z
Metadata Record Identifier edu.ucar.gdex::d463003
Metadata Language eng; USA
Suggested Citation National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce, Air Force Combat Climatology Center, U.S. Air Force, U.S. Department of Defense, 557th Weather Wing, U.S. Air Force, U. S. Department of Defense. (2005). NCDC TD3505 Integrated Surface Hourly Data. NSF National Center for Atmospheric Research. https://gdex.ucar.edu/datasets/d463003. Accessed 10 October 2025.

Harvest Source