NOAA Weather Documentation Report

Day-by-day NOAA GHCN-Daily station data compared with a historical baseline

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Generated from NOAA station data in minutes.

Abnormal weather flags use precipitation compared with a same-calendar-window baseline from up to 10 prior years (minimum 5), using mean plus one standard deviation where the station reports it.

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Each report contains day-by-day weather data with precipitation, temperature, and wind where the station reports it, plus abnormal weather flags from the baseline methodology described above.

Illustrative sample values — not a live station extract.

NOAA Weather Documentation Report

Location: Chicago, IL

Station: CHICAGO MIDWAY AIRPORT (GHCND:USW00014819), 7.1 mi

Report Period: January 15, 2026 to February 15, 2026

DatePrecip (in)Temp (°F)Wind (mph)Status
2026-01-150.022814Normal
2026-01-160.002418Normal
2026-01-171.283228Abnormal
2026-01-180.082622Normal
2026-01-190.001815Normal
2026-01-201.463429Abnormal
2026-01-210.123019Normal
2026-01-220.032216Normal
2026-01-230.002512Normal
2026-01-241.181528Abnormal
2026-01-250.052018Normal
2026-01-260.002814Normal
2026-01-270.103121Normal
2026-01-280.012617Normal
2026-01-290.002313Normal
2026-01-300.042716Normal
2026-01-310.072919Normal
2026-02-011.523531Abnormal
2026-02-020.093020Normal
2026-02-030.002615Normal
2026-02-040.022417Normal
2026-02-050.112822Normal
2026-02-061.343227Abnormal
2026-02-070.062918Normal
2026-02-080.002514Normal
2026-02-090.032716Normal
2026-02-100.083120Normal
2026-02-111.413629Abnormal
2026-02-120.103221Normal
2026-02-130.042817Normal
2026-02-140.002413Normal
2026-02-150.052615Normal

Methodology: Abnormal weather determined by precipitation exceeding historical mean + 1 standard deviation (μ = 0.62" | σ = 0.48") for the date range.

Data Source: NOAA Global Historical Climatology Network Daily (GHCN-Daily)

Traditional Problems

  • Days of delays waiting for human review
  • Generic summaries without day-by-day NOAA data
  • Weak documentation lacking methodology or NOAA citations

Our Solution

  • Automated report — Generated from station data after checkout
  • Day-by-day NOAA GHCN-Daily — Station data
  • Statistical baselines — Mean + 1σ methodology with citations

Weather data is provided for informational purposes. This report does not guarantee approval of any claim or represent official government documentation. Users are responsible for determining whether this data is useful for their own project.

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