* Barometers measure air pressure. A barometer only measures the air pressure at its location.

* Storms have complex vertical structure. Storms have varying air pressure at different altitudes, from the surface to the top of the storm cloud.

* Barometers aren't designed for altitude measurements. While a barometer can detect changes in air pressure related to a storm's approach, it cannot track the storm's internal structure across different altitudes.

To track the activity of storms at different altitudes, you need tools like:

* Weather balloons: These carry instruments that measure temperature, pressure, humidity, and wind speed at different heights.

* Radar: Radar systems can track precipitation and wind patterns within a storm, providing information about its structure.

* Satellites: Satellites provide a wide view of storms and their development, including information about their altitude and intensity.