Download and parse a full year of archived standard meteorological observations for a buoy from NDBC's historical data files
domain: www.ndbc.noaa.gov · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Locate the target station's historical data files (organized by station and year) via the NDBC historical data search/download pages.
Download the yearly text file for the station (current-year data is split into monthly files instead of one annual file).
Parse the fixed-format columns per the NDBC measurement descriptions/web data guide, noting header rows define each column's meaning and units.
Handle missing-data sentinel values, which differ from real-time files: historical files use a variable number of 9s (e.g. 999.0, 99.0) rather than the 'MM' used in real-time feeds.
Cross-reference station metadata (instrument height, payload type) since sensor configurations can change over a station's lifetime, affecting comparability across years.
Known gotchas
Missing-value sentinels differ between real-time (MM) and historical (99/999-style) files — a parser built for one will silently misinterpret the other's missing markers as real values.
Column layout and available variables can change over a station's history as instrumentation is upgraded, so a single fixed schema won't necessarily fit all years.
Files are gzip-compressed and organized by station-year; the current year's data isn't available as a single annual file until the year completes.
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