DADE Weather & Meteorology Flashcards

What is the definition of a thunderstorm's squall line as relevant to dispatch planning?

Answer: A narrow band of active thunderstorms along or ahead of a cold front

A squall line is a narrow band of active thunderstorms that typically forms ahead of or along a cold front and requires routing around for dispatch.

What does a negative temperature deviation from ISA indicate for aircraft performance planning?

Answer: Improved engine performance and shorter takeoff distances

When outside air temperature is colder than ISA standard, air density is higher, which improves engine performance and shortens takeoff distances.

Which meteorological condition creates the most significant density altitude concern for dispatch at high-elevation airports?

Answer: High temperatures combined with high humidity and high elevation

High temperature combined with high humidity and high elevation elevation significantly reduces air density, creating high density altitude and degraded aircraft performance.

What is the significance of a PIREP reporting moderate rime icing at a specific altitude for dispatch?

Answer: It provides real-time icing conditions useful for route planning and altitude selection

PIREPs reporting icing provide actual in-flight conditions that help dispatchers and pilots select altitudes and routes to avoid hazardous icing.

What ceiling and visibility values define visual meteorological conditions (VMC) in the US?

Answer: Ceiling at or above 3,000 feet and visibility 5 miles or greater

Basic VMC requires a ceiling at or above 3,000 feet AGL and visibility of 5 miles or greater for most controlled airspace operations.

How should a dispatcher account for headwinds when filing an IFR flight plan fuel load?

Answer: Headwinds increase flight time and fuel consumption requiring additional fuel

Headwinds reduce groundspeed, increasing flight time and fuel burn, so dispatchers must add extra fuel when significant headwinds are forecast.