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Using Buys Ballot's Law in the northern hemisphere, if you stand with the wind on your back, where is the centre of low pressure?

Q: Using Buys Ballot's Law in the northern hemisphere, if you stand with the wind on your back, where is the centre of low pressure?

To your left and slightly ahead Buys Ballot's Law: in the northern hemisphere, stand with the wind on your back — low pressure is to your left (with a slight correction forward due to surface friction, roughly 10–15°). Useful for quick tactical weather assessment at sea.

A. To your left and slightly ahead

B. To your right

C. Behind you

D. Directly ahead of you

What wind speed range and sea description corresponds to Beaufort Force 6?

A. 17–21 knots; fresh breeze; moderate waves, many white horses

B. 28–33 knots; near gale; sea heaps up, streaks of foam

C. 34–40 knots; gale; moderately high waves of greater length

D. 22–27 knots; strong breeze; large waves begin to form, white foam crests extensive

As a warm front passes your position, in what order do conditions typically change?

A. Cirrus cloud → thickening alto/stratus → steady rain → clearing → warmer, humid, possibly foggy conditions in the warm sector

B. Fog → drizzle → clearing → cold front

C. Cumulus builds → heavy showers → rapid clearance → cold and clear

D. Wind backs sharply, brief squall, then long clear period

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