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Dataset

SYNOP - hourly unvalidated observations from the KNMI automated network in text format

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State Available
Data owner Koninklijk Nederlands Meteorologisch Instituut (Rijk)
Updated 07-01-2026
License CC-BY (4.0)
Thema
  • Air
Publicity level Public
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Description

Unfortunately, during a server upgrade, the conversion to the decoded format was disrupted. As a result, we are currently unable to deliver the data in the usual format. We are still working on restoring the original data stream, but this process is unfortunately taking longer than initially expected. As an alternative, we also offer this data in BUFR format (https://dataplatform.knmi.nl/dataset/knmi-synop-bufr-1). This contains the same data, but is offered in a different format. This can be decoded using the pdbufr library (https://pdbufr.readthedocs.io/en/latest/).

Synoptical in-situ observations per one hour from the available operational stations in the Netherlands, the Dutch part of the North Sea continental shelf and from adjacent stations in Germany and Belgium. Decrypted WMO reports, presented in ASCII text format. Files are being updated with observations on a monthly basis, only the last month is available.

decoded dynamic open-data station-observations synop

Owner

Owner information

Data owner:
Koninklijk Nederlands Meteorologisch Instituut (Rijk)

Contact point

Department:
Koninklijk Nederlands Meteorologisch Instituut (KNMI)
Email address:
opendata@knmi.nl

Publication & catalogues

Data publisher:
Koninklijk Nederlands Meteorologisch Instituut (Rijk)

Reuse

Access rights:
Public
Status dataset:
Available

Licence & conditions

License:
CC-BY (4.0)

Location and time

Temporal coverage

Start coverage period:
01-06-2015
End coverage period:
31-12-9999

Relations

Comparable datasets

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  4. Precipitation - daily unvalidated precipitation sum in near real time
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  6. Hourly, validated and automated in-situ ground-based meteorological observations in the Netherlands
  7. Meteo surface - unvalidated observations of common atmospheric variables at 10 minute interval at Cabauw
  8. Precipitation - unvalidated dropsize distribution measured with 2D video disdrometer at 1 minute interval at Cabauw
  9. SYNOP - Hourly synoptical observations of stations in the Caribbean
  10. Soil heat - unvalidated soil temperature and heat flux profiles at 10 minute interval at Cabauw

Metadata

Language settings

Data language

  • English

Metadata language

  • English

Identifiers

Primary identifier

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Documentation

KNMI Data Platform

HTML CC-BY (4.0)
Download: https://dataplatform.knmi.nl/catalog/datasets/index.html?x-dataset=knmi_synop_hourly_decoded&x-dataset-version=1

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