FAA Instrument Flight Instructor (FII)WeatherMedium
A pilot is briefed that a fast-moving cold front will cross the route of flight within the hour. Which of the following weather characteristics should the pilot expect during the frontal passage?
- AWidespread advection fog forming ahead of the front with little change in wind direction
- BPersistent low stratus clouds and drizzle for an extended period before slow clearing
- CA narrow band of showery precipitation, possible thunderstorms, and rapid clearing after passage
- DA wide band of steady, light precipitation lasting several hours with gradually lowering ceilings
Show answer & explanationAnswer & explanation
Correct answer: C. A narrow band of showery precipitation, possible thunderstorms, and rapid clearing after passage
Fast-moving cold fronts produce a narrow band of intense, showery weather including possible thunderstorms and gusty winds, but clearing occurs rapidly after passage due to the steep frontal slope and quick movement. Warm fronts, in contrast, typically produce widespread stratiform clouds and steady precipitation over a broader area for a longer duration ahead of the front.
Why the other options are wrong
- A. Advection fog is unrelated to frontal passage mechanics and doesn't characterize cold front weather.
- B. Persistent stratus and drizzle are typical of warm front or stationary front conditions, not fast cold fronts.
- D. This describes a warm front, which has a shallow slope producing widespread steady precipitation.
Cold Front Weather Characteristics
Fast-moving cold fronts produce a narrow band of intense, showery precipitation, possible thunderstorms, and gusty winds, with rapid clearing after passage due to the steep frontal slope.
- Steep slope leads to narrow band of severe weather
- Often produces thunderstorms and gusty winds
- Rapid clearing follows frontal passage
Memory trick: Cold fronts hit 'Hard and Fast' then clear quickly.