Which weather phenomenon can a SIGMET NOT be associated with?

Which weather phenomenon can a SIGMET NOT be associated with?

• A. Severe icing
• B. A thunderstorm
• C. Non-convective turbulence
• D. Routine air temperature fluctuations

Answer: (D)

A SIGMET, or Significant Meteorological Information, is a notice utilized by pilots to alert them about significant weather phenomena that could impact flight safety. These phenomena include severe turbulence, thunderstorms, icing, and other hazardous conditions that are often not depicted on standard weather maps. The correct answer highlights that routine air temperature fluctuations do not warrant a SIGMET. This is because SIGMETs are specifically designed for significant and hazardous weather conditions that pose risks to aviation, rather than typical variations in air temperature that pilots regularly encounter. Routine air temperature changes are considered normal weather patterns and do not typically affect flight safety to the extent required for a SIGMET. In contrast, severe icing, thunderstorms, and non-convective turbulence are all serious weather hazards that can lead to dangerous flying conditions, making them significant enough to be included in SIGMET reports. Thus, a SIGMET is not issued for regular temperature fluctuations because they are mundane and manageable factors for aviation operations.

A SIGMET, or Significant Meteorological Information, is a notice utilized by pilots to alert them about significant weather phenomena that could impact flight safety. These phenomena include severe turbulence, thunderstorms, icing, and other hazardous conditions that are often not depicted on standard weather maps.

The correct answer highlights that routine air temperature fluctuations do not warrant a SIGMET. This is because SIGMETs are specifically designed for significant and hazardous weather conditions that pose risks to aviation, rather than typical variations in air temperature that pilots regularly encounter. Routine air temperature changes are considered normal weather patterns and do not typically affect flight safety to the extent required for a SIGMET.

In contrast, severe icing, thunderstorms, and non-convective turbulence are all serious weather hazards that can lead to dangerous flying conditions, making them significant enough to be included in SIGMET reports. Thus, a SIGMET is not issued for regular temperature fluctuations because they are mundane and manageable factors for aviation operations.