Weather

Forecast and historical weather data for analyzing electricity demand, renewable generation, and the operating conditions behind U.S. power markets.

8 datasetspublished by ATG DataUS reference7NYISO1

Weather datasets
Dataset	Cadence	Rows
BPA Anemometer ArchiveATG Data·US reference·BPA's archived anemometer-network readings (wind, temperature, pressure, humidity) at 28 tower levels, 1976 to April 2018.	5-minute to hourly	25.6M1976
High-Resolution Weather Forecast GridATG Data·US reference·A sub-hourly, vintage-stamped surface weather forecast over the continental United States. Each grid cell and valid time carries air temperature, wind vectors, radiation, precipitation, pressure, and related fields from NOAA's High-Resolution Rapid Refresh model. Modeled line ratings sample this grid along each mapped route, keep the forecast issue time, and apply only lead times that pass the public validation gate; this is forecast evidence, not a measurement at the conductor.	15-minute forecast grid	——
Line Rating Weather ValidationATG Data·US reference·Daily, leakage-safe validation of the forecast weather used by the modeled line-rating experiment. Each run scores fixed forecast lead times against realized public station temperatures, records temperature and rating-error metrics, and declares whether a lead band passes the release gate. The table contains aggregate validation results only: it does not retain station rows, operator facility ratings, restricted records, or line-level benchmark data.	daily validation run	5402026
Northwest 6–10 and 8–14 Day Weather OutlooksATG Data·US reference·Official CPC 6–10/8–14 day temperature and precipitation outlooks on a 0.25-degree Northwest grid. Retains issue dates, valid windows, retrieval vintages and category probabilities; weather context, not a power-price forecast.	daily, retained source revisions	——
TVA Gauge Daily PrecipitationATG Data·US reference·Daily incremental precipitation in inches with the source accumulation hours and raw Microsoft JSON date. Each collection rereads seven days for revisions; select the latest snapshot per gauge/date/hours for history. Explicit backfill windows are supported.	daily observations, collected every 6 hours	3.1K2026
NYISOWeather ForecastATG Data·NYISO·NYISO station-level weather forecast feed used by the load model, including maximum/minimum temperature and wet-bulb forecasts by station and vintage date.	daily forecast	691.8K2008
Weather Forecast Grid (Current + Ahead)ATG Data·US reference·Hourly weather forecasts on the same 0.25 degree latitude and longitude grid as the history table, extending about two days ahead — this is the dataset for current conditions and the hours in front of them, since the ERA5 history trails real time by several days. Rich per-point coverage: temperature, apparent and wet-bulb temperature, humidity, cloud cover, shortwave and direct radiation, wind speed and direction at 10, 80, 120, and 180 meters, gusts, precipitation, and CAPE — the drivers behind load, wind output, and solar output. Rows are vintage-stamped by lead_days (days between forecast issue and the valid hour); multiple vintages coexist per valid hour, so take the minimum lead_days per (valid_time, location_id) for the freshest view of any hour. Source: Open-Meteo.	hourly (forecast, 1-3 day leads)	9.22B2021
Weather History Grid (ERA5)ATG Data·US reference·Hourly historical weather sampled on a regular 0.25 degree latitude and longitude grid, covering 2 meter air temperature, precipitation, and 10 meter wind. The data is ERA5 reanalysis, which trails real time by several days — this table never carries the current hour or the future, so questions about weather right now or ahead belong on the Weather Forecast Grid instead. Because load, wind output, and solar output all track these variables closely, the grid lets operators, traders, and researchers tie past demand and renewable generation to the temperature and wind conditions that drove them. Source: Open-Meteo.	hourly (reanalysis, ~4-5 day lag)	6.47B2000

About weather data

Weather is a core input to load and renewable-generation analysis. The catalog provides forecast and historical gridded conditions that can be aligned with market locations and delivery times, while keeping forecast publication time distinct from the weather interval being predicted.