Meteorology · Tropical Cyclones — Early Signs
Which combination of observations is an early warning that a tropical cyclone may lie within several hundred miles?
- AA long, low swell from an unusual direction, high cirrus, and a barometer falling below its diurnal range✓ Correct
- BRising pressure, clear skies, and light offshore winds
- CSteam fog and falling sea temperature
- DA sudden wind shift with a sharp cold front
Explanation
Telltale early signs include a long low swell radiating from the storm, increasing high cirrus, an unusually colored sky, and a barometer that falls below its normal daily (diurnal) variation. Heeding these supports early evasive routing.
Authority: Bowditch (Pub. No. 9), signs of a tropical cyclone; WMO
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