ATC weather systems cannot detect the presence or absence of ___.

• A. Icing
• B. Turbulence
• C. Visibility
• D. Clouds

Answer: (D)

ATC weather systems are designed to relay conditions that affect flight safety, but they don’t directly detect every atmospheric feature. Clouds can exist without producing precipitation, and radar systems primarily detect reflected energy from hydrometeors (precipitation) rather than simply cloud cover. Therefore, cloud presence isn’t something ATC can determine directly through its own sensors; information about clouds comes from pilot reports, METARs, and satellite imagery rather than from radar returns.

Icing and turbulence are things pilots report or are forecasted, and visibility is measured by ground sensors at airports and reported in METARs. These are conditions ATC can and does convey, but clouds aren’t directly detectable by the typical ATC weather equipment.