FAA Commercial Pilot Airplane (CAX)WeatherHard
A pilot is conducting a preflight briefing and notes a SIGMET for 'EMBD TS' within a specific area. What does this indicate for flight planning?
- AThunderstorms occurring in clusters, but easily avoidable.
- BThunderstorms embedded within other cloud layers and obscured from view, indicating extreme caution.
- CThunderstorms that are dissipating and pose minimal threat.
- DIsolated thunderstorms with tops below 10,000 feet AGL.
Show answer & explanationAnswer & explanation
Correct answer: B. Thunderstorms embedded within other cloud layers and obscured from view, indicating extreme caution.
A SIGMET for 'EMBD TS' (Embedded Thunderstorms) indicates thunderstorms that are obscured by other cloud formations and cannot be seen. This condition is particularly hazardous because pilots may not be able to visually identify and avoid the storms, making inadvertent entry into severe turbulence, strong updrafts/downdrafts, and hail much more likely. Extreme caution and often re-routing are required.
Why the other options are wrong
- A. Embedded thunderstorms are specifically difficult to avoid because they are hidden.
- C. Dissipating thunderstorms are usually indicated by different terminology or lack of a SIGMET.
- D. This describes less severe, isolated activity, not 'EMBD TS'.
Embedded Thunderstorms
Thunderstorms that are hidden within other cloud layers, making them impossible to see from the cockpit.
- Extremely dangerous for pilots due to lack of visual cues.
- Often associated with widespread areas of instrument meteorological conditions (IMC).
- Requires significant deviation or ground-based radar for avoidance.
Memory trick: Embedded means hidden, a storm unseen, a danger unfurled, a treacherous scene.