Meteorology · Tropical Cyclones — Dangerous Semicircle
In a Northern Hemisphere tropical cyclone, the 'dangerous semicircle' is the half where:
- AThe eye, where it is calm
- BThe left side, where winds are weakest
- CThe right side (relative to the storm's track), where wind speed and the storm's motion combine and seas tend to carry a vessel into the path✓ Correct
- DThe trailing semicircle behind the center
Explanation
In the NH the right-hand semicircle (relative to track) is dangerous: the cyclonic wind and the storm's forward motion add, winds are stronger, and the wind tends to drive a vessel ahead of and into the storm's path. The left side is the 'navigable' semicircle.
Authority: Bowditch (Pub. No. 9), tropical cyclone avoidance; WMO
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