Meteorology · Marine Warnings — Small Craft Advisory
A Small Craft Advisory issued by the U.S. National Weather Service warns of:
- AWinds of hurricane force
- BSustained winds or seas hazardous to small vessels (commonly winds about 18–33 kt, or dangerous sea/wave conditions)✓ Correct
- COnly thunderstorms with no wind
- DFog with no wind hazard
Explanation
A Small Craft Advisory flags winds (typically roughly 18–33 kt, varying by region) or hazardous seas that threaten small craft. Above this, a Gale Warning covers 34–47 kt, a Storm Warning 48–63 kt, and a Hurricane Force Warning 64 kt and above. Operators weigh advisories against their vessel's limits.
Authority: NWS marine warnings
Practice the full Meteorology bank
Free spaced-repetition quizzing across 2550 USCG exam questions — it schedules your reviews so the ones you miss come back until they stick.
Related Meteorology questions
- Atmosphere & Pressure
Standard atmospheric pressure at sea level is approximately:
- Atmosphere & Pressure
One millibar (mb) is equal to:
- Atmosphere & Pressure
A barometer that is falling rapidly most likely indicates:
- Atmosphere & Pressure
On a surface weather chart, isobars spaced very close together indicate:
- Wind
By convention, a wind is named for:
- Wind
In the Northern Hemisphere, the Coriolis effect deflects moving air: