Every hour this site archives the raw material of the local weather story — METARs, TAFs, forecast snapshots, the NWS grid, alerts, model soundings and every forecast discussion. This page is the reading room: pick any archived day and see what happened, what was forecast, and how the two compare. Live views: weather · discussion.
The NWS hourly grid at the field as it stood that morning — the table every weather app renders — beside the GFS's CAPE and precipitation rate. Forecast, not observation.
Nothing archived for this day.
Daily temperature span (KDCA, each bar min → max of the day's own METARs), colored by the day's high. Below: the day's worst daytime flight category, and dots for days with rain (·) and thunderstorms (⚡) in the METARs.