Cumulonimbus clouds are tall, dense, and vertically developed, often associated with severe thunderstorms and tornadoes.
A falling barometer usually indicates that a low-pressure system is approaching, which often brings worsening weather conditions, such as storms.
Advection fog forms when warm, moist air moves horizontally over a cooler surface, causing the air to cool and condense.
Halos around the sun or moon are caused by the refraction of light through ice crystals in cirrostratus clouds, which are often associated with an approaching warm front and potentially deteriorating weather.
Sea breezes are caused by the temperature difference between the land and the sea, with cooler air from the sea moving inland to replace the rising warm air over the land.
