If an unstable air mass is forced upward, what type of clouds can be expected?

• A. Clouds with considerable vertical development and turbulence
• B. Flat, layered stratus clouds with little turbulence
• C. Clouds with little to no vertical development
• D. Cirrus clouds at high altitude

Answer: (A)

When an unstable air mass is lifted, buoyancy makes the rising air parcels continue to ascend. As they rise, they expand and cool, and the moisture condenses into cloud droplets, allowing the cloud to grow tall. That combination—strong updrafts and continued vertical growth—produces clouds with considerable vertical development and turbulence, such as towering cumulus or cumulonimbus.

In contrast, flat, layered stratus clouds form in stable air with little vertical motion, and clouds with little vertical development indicate minimal uplifting. Cirrus clouds are high, wispy formations that don’t reflect the rapid vertical growth produced by unstable uplift.