What does rapidly falling pressure at a weather station usually indicate?

1. 1A period of stable, clear weather is starting
2. 2A high-pressure system is building over the station
3. 3Bad weather and possibly storms are approaching
4. 4Winds will become light and the sky will clear

Source: Pilot's Handbook of Aeronautical Knowledge (FAA-H-8083-25C), Chapter 12: Weather Theory — Measurement of Atmospheric Pressure, page 289