schraads/nws-telemetry-historical-cli

NWS Telemetry Historical: Daily Climate Reports (CLI)

Daily Climate Reports from NWS offices: observed temperature with time of occurrence, precipitation, snow, degree days, wind, humidity and sky cover, each with normals, departures, records and last year's value. Richer than CF6 for context and records.

One row = one station and one climate day, from one bulletin.

Part of a family of datasets built from a continuous, deduplicated capture of the National Weather Service text feeds (NWWS-OI and EMWIN), recorded as each product is issued. Collection began in October 2026 and is ongoing; new daily files are added continuously. Gaps are possible whenever the capture was offline.

Quick start

from datasets import load_dataset

ds = load_dataset("schraads/nws-telemetry-historical-cli", split="train")
# or stream it without downloading everything:
ds = load_dataset("schraads/nws-telemetry-historical-cli", split="train", streaming=True)
print(next(iter(ds)))

Files are daily JSON Lines, data/YYYYMMDD_historical_cli_dataset.jsonl, where the date is the UTC issuance date.

Schema

All timestamps are UTC ISO-8601 with a trailing Z. Missing values are null, never 0.

Product and bulletin

Field	Type	Description
record_id	string	Unique row id (<source file name>#...).
issuance_timestamp	string (UTC)	When NWS issued the product, from the WMO header, e.g. 2026-10-22T01:07:00Z.
received_timestamp	string (UTC)	When this collector received the bulletin (from the file name). Compare with issuance_timestamp for feed latency.
wmo_header	string	WMO abbreviated header, e.g. WUUS55.
issuing_office	string	4-letter issuing office, e.g. KABQ.
wmo_ddhhmm	string	Day/hour/minute group from the WMO header.
awips_id	string	AWIPS product id, e.g. SVRABQ.
bbb_indicator	string	WMO BBB amendment indicator (e.g. COR), else null.
is_correction	bool	True for corrected bulletins.
file_source	string	Name of the source bulletin file.
content_sha256	string	SHA-256 of the cleaned bulletin text the row came from.
product_title / office_name / product_issued_text	string	Header lines (office and issue time in local time).
station_id / station_name	string	3-letter id from the AWIPS id, and the station name as written.
climate_date	string	Local climate day (YYYY-MM-DD) the report describes.
period_label	string	YESTERDAY for the usual early-morning report, or TODAY for a same-day (partial) report.
valid_text	string	"VALID TODAY AS OF ..." wording when present, or SINCE MIDNIGHT on Palau partial reports.
report_format	string	standard or pacific_daily (the simpler layout some Pacific offices use; see notes).
normal_period_start / normal_period_end	int	Years of the climate normal period, e.g. 1991-2020.
record_period_start / record_period_end	int	Years covered by the station's records.

Temperature (temp_max_*, temp_min_*, temp_avg_*)

Field	Type	Description
temp_{max,min}_f	int	Observed daily maximum / minimum (F).
temp_{max,min}_time_lst	string	Time of occurrence in local standard time, e.g. 309 PM.
temp_{max,min}_record_f / _record_years	int / list[int]	Record value and the year(s) it was set.
temp_{max,min}_record_set	bool	A record was set or tied that day.
temp_{max,min,avg}_normal_f / _departure_f / _last_year_f	int	Normal, departure from normal, and last year's value.
temp_avg_f	int	Average temperature.

Precipitation and snow (precip_*, snow_*)

Field	Type	Description
precip_in / snow_in	float	Observed amount (inches).
precip_trace / snow_trace	bool	Trace amount (value is 0.0).
*_record_in / *_record_years	float / list[int]	Daily record and year(s).
*_normal_in / *_departure_in / *_last_year_in	float	Normal, departure and last year.
*_month_to_date_in / *_month_normal_in / *_month_departure_in	float	Month-to-date value, normal and departure.
precip_since_jan1_* / snow_season_to_date_*	float	Year-to-date precipitation and season-to-date snow (since Jul 1) with normal and departure.
snow_depth_in	float	Snow depth.

Degree days (heating_*, cooling_*)

Field	Type	Description
heating_degree_days / cooling_degree_days	int	Daily value.
*_normal / *_departure	int	Normal and departure from normal.
*_month_to_date / heating_..._season_to_date / cooling_..._year_to_date	int	Month-to-date, season-to-date (heating) and year-to-date (cooling).

Wind, sky, humidity, weather

Field	Type	Description
wind_highest_speed_mph / wind_highest_dir_text / wind_highest_dir_deg	int / string / int	Highest wind speed and direction.
gust_highest_speed_mph / gust_highest_dir_text / gust_highest_dir_deg	int / string / int	Highest gust and direction.
wind_avg_mph	float	Average wind speed.
wind_fastest_2min_mph / wind_fastest_2min_dir_text / wind_fastest_2min_time_lst	int / string / string	Fastest 2-minute wind, its direction and time (pacific_daily reports only).
peak_wind_mph / peak_wind_dir_text / peak_wind_time_lst	int / string / string	Peak wind, direction and time (pacific_daily reports only; often missing).
sky_cover_avg / possible_sunshine_pct	float / int	Average sky cover and possible sunshine percent.
rh_highest_pct / rh_lowest_pct / rh_average_pct	int	Relative humidity extremes and average.
rh_highest_time_lst / rh_lowest_time_lst	string	Times of the humidity extremes (local standard time).
weather_conditions	list[string]	Weather items recorded.
no_significant_weather	bool	The report says no significant weather was observed.

Normals and sun

Field	Type	Description
normals_for	string	TODAY or TOMORROW: the day the following normals apply to.
normals_max_f / normals_min_f	int	Normal high and low for that day.
normals_record_max_f / normals_record_min_f	int	Record high and low for that day.
normals_record_max_years / normals_record_min_years	list[int]	Year(s) the records were set.
sunrise_sunset	list[object]	{date_text, sunrise, sunset, timezone} entries.

Conventions and caveats

• Times of day inside the report are local standard time, as written.
• "MM"/"M" (missing) become null; a trailing "R" on a value (record set or tied) is removed and reported in *_record_set.
• Early-morning reports are preliminary and are sometimes corrected later by NWS.
• A station can issue a report in which the daily observed values are all missing (for example during an instrument outage). The row is still kept: the observed fields are null, and the normals, records, last year's values and month/year-to-date totals the report does carry are filled in.
• Some Pacific offices (for example Chuuk, PTKK, and Palau, PTKR) use a simpler pacific_daily layout with fewer items; the rest are null. They issue a partial same-day report (period_label = TODAY) and a full-day report (YESTERDAY) for each day, so one climate_date can have two rows; prefer YESTERDAY for final values.
• In the Palau layout the middle temperature column is labeled RECORD, but its values never change from day to day and match the NORMAL line, so they are stored as temp_max_normal_f / temp_min_normal_f.
• This data is parsed from free-form NWS text with rule-based parsers. Parsing errors are possible; the original wording is kept in the text fields so you can check or re-parse it.
• This is an independent project and is not an official NWS or NOAA product. Do not use it for life-safety decisions; use the official sources at weather.gov.

Duplicate handling

A bulletin can arrive more than once, for example over both NWWS-OI and EMWIN. Duplicates are removed in two layers: the capture system drops repeats before storage, and the converter checks again before writing each daily file. Two bulletins are the same when issuing office, product id, issue time, amendment indicator, station, climate date and period match. EMWIN only fills gaps in NWWS, so an EMWIN copy is dropped whenever an NWWS copy of the same bulletin exists (EMWIN copies sometimes lose runs of spaces). Two NWWS copies are merged only when their parsed values are identical. Re-running a conversion never adds rows twice. Official re-issuances, corrections (bbb_indicator) and updates are different bulletins and are all kept. So is a re-sent bulletin with the same header but different content, for example a correction sent without the COR marker: both versions are kept and can be told apart by received_timestamp. Copies are matched on the fields above, so a copy whose header was damaged would not be recognised as a duplicate and both copies would be kept rather than risk losing data.

Provenance

Source products are issued by the U.S. National Weather Service and are works of the U.S. Government. They were received over NWWS-OI and EMWIN, deduplicated, and parsed into this schema. Credit to NWS as the original data source is appreciated.

License

The compiled dataset, schema and parsing are released under Creative Commons Attribution 4.0 (CC BY 4.0). Please credit schraads and link to this dataset. The underlying NWS content is in the public domain.

Citation

@dataset{schraads_nws_telemetry_historical_cli,
  author    = {schraads},
  title     = {NWS Telemetry Historical: Daily Climate Reports (CLI)},
  year      = {2026},
  publisher = {Hugging Face},
  url       = {https://huggingface.co/datasets/schraads/nws-telemetry-historical-cli}
}

Related datasets

• schraads/nws-telemetry-historical-zfp: Zone Forecast Product (ZFP)
• schraads/nws-telemetry-historical-warnings: Warnings (TOR / SVR / FFW + statements)
• schraads/nws-telemetry-historical-lsr: Local Storm Reports (LSR)
• schraads/nws-telemetry-historical-cf6: Daily Climate Data (CF6)
• schraads/nws-telemetry-historical-rwr: Regional Weather Roundup (RWR)

Want more?

Interested in a live structured feed, longer history, custom pulls, or verified/labeled versions (for example warnings matched against storm reports)? Open a discussion on this repo.