FAA Private Pilot Helicopter (PRH)WeatherEasy
A pilot's preflight weather briefing indicates a warm front approaching the route of flight. Which condition is most characteristic of the weather ahead of the front prior to its passage?
- ALow ceilings, poor visibility, and steady precipitation
- BRapidly rising temperatures and improving visibility
- CGusty surface winds shifting abruptly to the west
- DCumulonimbus clouds with severe turbulence and rapid clearing
Show answer & explanationAnswer & explanation
Correct answer: A. Low ceilings, poor visibility, and steady precipitation
Warm fronts are associated with gradually lowering stratiform cloud decks, extensive precipitation, and reduced visibility ahead of the surface front due to the shallow slope of warm air overriding cooler air. Rapid clearing and cumuliform buildups with wind shifts are more typical of a cold front passage.
Why the other options are wrong
- B. Temperatures rise only after frontal passage, not ahead of it.
- C. Wind shifts to the west typically occur after cold front passage.
- D. Cumulonimbus and rapid clearing are cold front characteristics.
Warm Front Weather
A warm front occurs where warm air advances over retreating cooler air, producing a shallow slope that generates widespread stratiform clouds and precipitation ahead of the surface boundary.
- Gradual cloud lowering: cirrus to stratus
- Steady precipitation and poor visibility ahead of passage
- Temperature and dew point rise, winds shift after passage
Memory trick: Warm front = slow soak, cold front = sudden slam