How to describe the air pressure condition?

Generally, it is a term used when climbing mountains at high altitude or conducting research and operation on aerospace vehicles.

Air pressure in low-pressure system: the ambient air pressure drops to the low-pressure center; Air flow status: air rising; Weather conditions: rainy weather.

Air pressure of high-pressure system: the ambient air pressure increases to the high-pressure center; Air flow conditions: air sinking weather conditions: sunny and dry weather.