When the temperature and dew point are close to the same number, what can you expect?

When the temperature and dew point are close to the same number, what can you expect?

• A. Fog/Air saturation
• B. Sunny skies
• C. Moderate turbulence
• D. Clear conditions

Answer: (A)

When temperature and the dew point are close, the air is almost saturated with moisture, so relative humidity is very high. The dew point is the temperature at which air becomes saturated and condensation begins. If the air near the surface cools to that dew point, water vapor condenses into tiny droplets, forming fog (or dew on surfaces). So this situation signals air saturation and likely fog, which reduces visibility. Sunny skies or clear conditions require much lower humidity, and turbulence isn’t directly caused by air being near saturation.

When temperature and the dew point are close, the air is almost saturated with moisture, so relative humidity is very high. The dew point is the temperature at which air becomes saturated and condensation begins. If the air near the surface cools to that dew point, water vapor condenses into tiny droplets, forming fog (or dew on surfaces). So this situation signals air saturation and likely fog, which reduces visibility. Sunny skies or clear conditions require much lower humidity, and turbulence isn’t directly caused by air being near saturation.