4cast Truth Oracle

NOAA forecast and observation data

Load the parquet files for a window, then query them with DuckDB in your browser. Forecast files are several MB each; a full day is over 100 MB.

Start (UTC)

End (UTC)

Files Observations Forecasts

Loading DuckDB…

Forecasts schemaEmpty

Observations schemaEmpty

Example queries

Examples use UTC days and Fahrenheit temperatures. Precipitation columns show reported interval maxima, not daily totals. Forecast intervals can cross midnight.

Query

SELECT * FROM observations ORDER BY station_id, generated_at DESC LIMIT 200

DuckDB SQL. Tables: observations, forecasts. Query documentation