Dew Point & Cloud Base (Lifting Condensation Level) — 2D Thermodynamic Diagram

Watch a single physical fact build an entire cumulus cloud: a rising parcel of air cools at the dry adiabatic lapse rate (≈9.8°C/km) while its dew point falls about five times slower, so the two temperatures converge with altitude and meet at the Lifting Condensation Level — the sharp, flat cloud base you see on any fair-weather day. This 2D build draws both lapse-rate lines on a live temperature-vs-altitude diagram, finds their crossing altitude by numerical root-finding rather than the textbook shortcut, and animates the parcel rising along its own temperature line until it visibly starts condensing exactly at that computed LCL, alongside a real-time relative-humidity readout from the Magnus-Tetens formula.