Answer: There will be stormy weather
Explanation:
Barometers is used to measure the pressure of atmosphere.
If there is sudden drop, then there will be stormy weather.
As it shows pressure is down suddenly due to which there will be storm.
If there is slowly drop in barometer, then there will be rainfall.
But if barometric pressure has dropping all day then there will stormy weather all day.
Hence , there will be stormy weather.
