Historical weather downloads are easy to misread: a missing-value sentinel is not a very cold day, flags matter, and temperature and precipitation fields need the correct scale.
Unlock an original fixed-width GHCN-Daily parser for TMAX, TMIN and PRCP, a synthetic edge-case test and a real station-file format check. It retains measurement, quality and source flags instead of reducing everything to an unexplained number.
Scope: NOAA GHCN-Daily .dly monthly records, not forecasts, hourly observations or certified climate analysis. The station-file route, README and parser were checked on 18 October 2026. #WeatherData #GHCN
Unlock an original fixed-width GHCN-Daily parser for TMAX, TMIN and PRCP, a synthetic edge-case test and a real station-file format check. It retains measurement, quality and source flags instead of reducing everything to an unexplained number.
Scope: NOAA GHCN-Daily .dly monthly records, not forecasts, hourly observations or certified climate analysis. The station-file route, README and parser were checked on 18 October 2026. #WeatherData #GHCN
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