A coastal skipper observes the aneroid barometer dropping at a rate exceeding 2.0 hPa (mbar) per hour over a 3-hour period. What does this rapid barometric pressure trend indicate?

1. An intense, rapidly moving low-pressure system or active cold front is approaching, indicating imminent gale-force or storm-force winds and deteriorating sea state
2. Stable anticyclonic weather with calm seas and sunny skies for the next 48 hours
3. A normal diurnal semi-diurnal atmospheric tidal fluctuation (marea barométrica)
4. The vessel's battery charger is overcharging the electronic barometer sensor