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Meteorology and Weather Flashcards

6 cards from real USCG practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 6 Meteorology and Weather flashcards as text

  1. A tropical cyclone in the Atlantic or eastern Pacific with sustained winds of 74 mph or greater is classified as?

    Answer: A hurricane

    A tropical cyclone in the Atlantic or eastern Pacific is called a hurricane when sustained winds reach 74 mph (64 knots) or greater.

  2. What is the 'dangerous semicircle' of a hurricane in the Northern Hemisphere?

    Answer: The right side of the storm's path

    The right semicircle of a Northern Hemisphere hurricane is considered dangerous because storm winds add to the forward speed of the storm, increasing wave heights and surge.

  3. What does GMDSS weather broadcast format NAVTEX provide to mariners?

    Answer: Printed text weather forecasts and navigational warnings

    NAVTEX broadcasts meteorological warnings, navigational warnings, and search-and-rescue information as printed text via a dedicated 518 kHz frequency.

  4. Sea fog most commonly forms when?

    Answer: Air and sea temperatures are nearly equal and humidity is high

    Sea fog forms when warm, humid air is chilled to its dew point upon contact with a cooler sea surface, which most often occurs when air and sea temperatures are close.

  5. What is a 'gale warning' issued for?

    Answer: Winds 34–47 knots

    The National Weather Service issues a gale warning when sustained winds of 34 to 47 knots are expected in marine areas.

  6. Which cloud type is associated with thunderstorms and severe weather?

    Answer: Cumulonimbus

    Cumulonimbus clouds are towering convective clouds that produce thunderstorms, heavy rain, hail, lightning, and sometimes tornadoes.

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Sources & references

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  1. dco.uscg.mil — Test delivery, registration deadline, passing score, exam information · verified Oct 2026
  2. ecfr.gov — Eligibility, score validity, retake policy, test dates, renewal, fees · verified Oct 2026