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Surface Airways Observations (SAO) Hourly Data (1965-1981) (CDMP)

Metadata Updated: September 19, 2023

The dataset consists primarily of U.S. surface airways observations (SAO) data beginning in 1965 and extending through 1981.

Note that a few stations have already had certain years within this 1965-81 period re-keyed as hourly. For these stations, only a subset of the period was keyed. In addition, other stations did not have data keyed at all during this period, or during the periods immediately before or after the 1965-81 range. These stations data have been keyed to as thoroughly as possible complete their entire period of record back to July, 1948.

The major data variables are as follows: WBAN Identification Station Number, observational type, ceiling and cloud, visibility, present weather, temperature, relative humidity, wind, pressure and precipitation. The observations are generally recorded for the 24 hour period midnight to midnight.

The keying format was designed to reflect the data as entered on the page to make keying easier for the key entry personnel, who were not trained meteorological technicians. The "raw" observations which comprise this dataset will be quality checked to include data adjustments and converted to NCDC's Integrated Surface Hourly (ISH) format.

Access & Use Information

License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

Downloads & Resources


Metadata Date June 23, 2023
Metadata Created Date October 28, 2022
Metadata Updated Date September 19, 2023
Reference Date(s) March 9, 2006 (publication), March 9, 2006 (creation)
Frequency Of Update notPlanned

Metadata Source

Harvested from ncdc

Additional Metadata

Resource Type Dataset
Metadata Date June 23, 2023
Metadata Created Date October 28, 2022
Metadata Updated Date September 19, 2023
Reference Date(s) March 9, 2006 (publication), March 9, 2006 (creation)
Responsible Party NOAA National Centers for Environmental Information (Point of Contact)
Contact Email
Guid gov.noaa.ncdc:C01309
Access Constraints Cite this dataset when used as a source., Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives., Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose.
Bbox East Long -66.0
Bbox North Lat 72.0
Bbox South Lat 18.0
Bbox West Long 172.0
Coupled Resource
Frequency Of Update notPlanned
Harvest Object Id f065df96-d221-4886-ad50-54a2e74fee11
Harvest Source Id 2cb3ef77-1683-4c2a-9119-dc65e50917c6
Harvest Source Title ncdc
Lineage Data in this dataset were keyed by contract staff under the Climate Database Modernization Program (CDMP), sent to NCDC via FTP. Data were also sent to the Northeast Regional Climate Center (NeRCC) in Ithaca, New York, where staff applied automated quality control (QC) routines and sent QC'd data files back to NCDC. The period was chosen because the Weather Bureau/Weather Service forms were more consistent during this time period, allowing for faster keying of data.
Metadata Language eng; USA
Metadata Type geospatial
Old Spatial {"type": "Polygon", "coordinates": [[[172.0, 18.0], [-66.0, 18.0], [-66.0, 72.0], [172.0, 72.0], [172.0, 18.0]]]}
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True
Temporal Extent Begin 1965-01-01
Temporal Extent End 1981-12-31

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