🔍 Key Concepts

• Typical sequence of barometric pressure changes ahead of a warm front • How warm air and cold air masses interact at a frontal boundary • Difference between conditions well ahead, just before, and after a warm front passes

💭 Think About

• Think about what usually happens to pressure for several hours before a warm front actually arrives—does it generally trend up, down, or remain flat? • Consider how the lighter, warmer air moving toward your area affects the weight of the air column above you. • Ask yourself: in standard weather reports, when a warm front is forecast to approach, what kind of barometer trend is usually mentioned?

✅ Before You Answer

• Recall that a front is a boundary between two air masses with different temperatures and densities—how does that affect pressure? • Focus on the word "approaches" (before passage), not what happens after the front has gone by. • Eliminate any option that does not describe a clear trend typically used in marine weather forecasts.