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WX0503a · Clouds, Fog & Beaufort Scale (Written)

7 questions · 0 multiple choice · 7 written · ASA 109 Marine Weather — Clouds, Fog & Beaufort Scale (Written)

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Q1
Explain why low clouds do not move in the same direction the surface wind does, and does this depend on hemisphere.
Q2
Give several examples of the Beaufort Wind scale that are easy to remember and useful frequently.
Q3
What is the basic difference between stratus type clouds overhead versus cumulus type clouds, and how does that impact our sailing?
Q4
Explain why some types of fog can come with 30 knots of wind and won’t “burn off” while other types of fog can only be formed in very light air and burns off by midday—and how to tell the difference.
Q5
Why certain cloud patterns cause oscillating wind shifts large enough to jibe on.
Q6
Why is it that official fog forecasts in some areas can be reliable even when wind forecasts on the same day have been totally wrong?
Q7
How do we judge the severity of approaching bad weather from the nature of high clouds that precede them over existing fair weather?