Forensic Weather Documentation

Weather Delay
Claim Report

Prove abnormal weather days with NOAA GHCN-Daily station data

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Important Disclaimers:

  • This report is not legal advice and does not constitute an official weather certification.
  • Weather data is provided for informational purposes and represents a comparison of conditions vs. historical baselines.
  • This report does not guarantee approval of any claim or represent official government documentation.
  • Users are responsible for determining the applicability and sufficiency of this data for their specific claim requirements.

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Each report contains day-by-day forensic weather data from real NOAA GHCN stations with precipitation, temperature, wind speed, and abnormal weather flags determined by statistical analysis (mean + 1 standard deviation) of 10-year historical baselines.

Weather Delay Claim Report

Location: Chicago, IL

Station: GHCND:USW00094846 (O'Hare International, 8.2 mi, 97% coverage)

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)

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  • Statistical baselines — Mean + 1σ methodology with citations

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