Editing

**Cloud-base estimation from temperature and dewpoint.** - METAR `02/M01` → **+2 °C / −1 °C** ("M" = minus). **Spread = 3 °C**. - **Rule of thumb:** `cloud base (ft AGL) ≈ (T − Td)°C × 400`. - For this example: 3 °C × 400 ≈ **1 200 ft AGL** estimated cloud base. - The slide's "* 1 000 ft" annotations refer to applying the formula for *each* cloud layer found in the observation.

Cancel