CPC Weather Interpretation & Meteorology for Controllers

Question 1

What is a SIGMET and when is it issued?

Accepted Answer

A non-convective weather advisory for severe or extreme conditions affecting all aircraft

Answer

A SIGMET (Significant Meteorological Information) is issued for non-convective phenomena such as severe turbulence, severe icing, or volcanic ash that may affect all aircraft.

Question 2

A Convective SIGMET is automatically issued when a thunderstorm cell contains hail at the surface of at least:

Accepted Answer

3/4 inch diameter

Answer

Convective SIGMETs are issued for surface hail of 3/4 inch or greater diameter, among other convective criteria.

Question 3

What weather phenomenon is most commonly associated with clear-air turbulence (CAT)?

Accepted Answer

Jet stream boundaries and wind shear

Answer

Clear-air turbulence most frequently occurs near jet stream boundaries where strong horizontal and vertical wind shear exists.

Question 4

When a pilot reports a ceiling of 800 feet and visibility of 1.5 miles, the conditions are classified as:

Accepted Answer

IFR

Answer

IFR conditions are defined as a ceiling below 1,000 feet and/or visibility less than 3 miles; this report meets both IFR thresholds.

Question 5

Which weather product provides a 24–48 hour forecast of enroute conditions including turbulence, icing, and freezing levels?

Accepted Answer

FA (Area Forecast)

Answer

The Area Forecast (FA) provides an 18-hour forecast plus a 12-hour outlook for clouds, weather, and conditions over a large region.

(CPC) Certified Professional Controller Practice Test

(CPC) Certified Professional Controller Practice Test

CPC Weather Interpretation & Meteorology for Controllers