030 - Meteorology PPL (A) | ATPL Exam Question Bank

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What change in wind direction can be anticipated during the passage of a polar front low over Central Europe?

A
Veering wind during passage of the warm front, veering wind during passage of the cold front.
B
Backing wind during passage of the warm front, backing wind during passage of the cold front.
C
Veering wind during passage of the warm front, backing wind during passage of the cold front.
D
Backing wind during passage of the warm front, veering wind during passage of the cold front.

Refer to figure.

Changes on the Passage of a Warm Front
Temperature and dew point	Visibility	Surface Pressure	Cloud and Precipitation	Wind
Temperature increases as cold sector air is replaced by warm sector air and dew point increases.	Visibility steadily decreases as the front approaches, then at the front itself except frontal fog.	Falls as area of low-pressure approaches then steadies in the warm sector.	Cloud base lowers and cloud thickens with steadily increasing precipitation.	Backs initially then veers at the front with a steady increase in speed.

Changes on the Passage of a Cold Front
Temperature and dew point	Visibility	Surface Pressure	Cloud and Precipitation	Wind
Temperature and dew point falls as warm sector air is replaced by cold sector air.	Just ahead of the cold front, and as it passes, visibility will be poor, but after the cold front, visibility will improve except within the showers behind.	Falls as front approaches, then rises as front passes.	Embedded cumulonimbus just ahead of the front then after the front passes, cloud base rises and the clouds thin. Isolated cumulus behind the front.	Backs just before the front, then veers sharply at the front and increases in speed. After the front has passed the wind will decrease and back.

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