The passing of the warm front caused a significant variation in weather

When a warm front passes through, the air becomes noticeably warmer and more humid than it was before. ... On colored weather maps, a warm front is drawn with a solid red line. There is typically a noticeable temperature change from one side of the warm front to the other.

Explanation:

When a warm front passes through, the air becomes noticeably warmer and more humid than it was before. ... On colored weather maps, a warm front is drawn with a solid red line. There is typically a noticeable temperature change from one side of the warm front to the other

Explanation:

Um...cool. That's a cool system.