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

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Date	Precip (in)	Temp (°F)	Wind (mph)	Status
2026-01-15	0.02	28	14	Normal
2026-01-16	0.00	24	18	Normal
2026-01-17	1.28	32	28	Abnormal
2026-01-18	0.08	26	22	Normal
2026-01-19	0.00	18	15	Normal
2026-01-20	1.46	34	29	Abnormal
2026-01-21	0.12	30	19	Normal
2026-01-22	0.03	22	16	Normal
2026-01-23	0.00	25	12	Normal
2026-01-24	1.18	15	28	Abnormal
2026-01-25	0.05	20	18	Normal
2026-01-26	0.00	28	14	Normal
2026-01-27	0.10	31	21	Normal
2026-01-28	0.01	26	17	Normal
2026-01-29	0.00	23	13	Normal
2026-01-30	0.04	27	16	Normal
2026-01-31	0.07	29	19	Normal
2026-02-01	1.52	35	31	Abnormal
2026-02-02	0.09	30	20	Normal
2026-02-03	0.00	26	15	Normal
2026-02-04	0.02	24	17	Normal
2026-02-05	0.11	28	22	Normal
2026-02-06	1.34	32	27	Abnormal
2026-02-07	0.06	29	18	Normal
2026-02-08	0.00	25	14	Normal
2026-02-09	0.03	27	16	Normal
2026-02-10	0.08	31	20	Normal
2026-02-11	1.41	36	29	Abnormal
2026-02-12	0.10	32	21	Normal
2026-02-13	0.04	28	17	Normal
2026-02-14	0.00	24	13	Normal
2026-02-15	0.05	26	15	Normal

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

Guides

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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