Which weather condition best describes low pressure systems?

• A. Dry and clear with cooler temperatures
• B. Wet, cloudy, and usually warmer
• C. High winds with rainfall only at the edges
• D. Stable conditions with no clouds

Answer: (B)

Low pressure systems drive rising air. When air rises, it expands and cools, which makes water vapor condense into clouds and often leads to precipitation. The result is generally unsettled, wet, and cloudy weather. The moisture and air movement around a low can also bring in warmer air and release latent heat during condensation, so you often see warmer, moist air associated with these systems. That combination—wet, cloudy skies with precipitation and a tendency toward warmer conditions relative to clear, dry air—fits this choice best. Dry, clear weather is more typical of high-pressure systems; the other descriptions don’t match the common effects of a low-pressure center.