PITTSBURGH (KDKA) — Oftentimes in weathercasts, you'll hear KDKA-TV's First Alert meteorologists mention the relative humidity and dew point, but what are these two terms and what do they mean?

Over the past couple of days, you may have noticed our NBC5 First Warning Weather Team mention the term “dew point” or “humidity” in a weathercast. But what exactly is a dew point ...