Weather Awareness Flashcards

What does a rapidly falling barometer reading indicate for boaters?

Answer: A storm or bad weather is likely approaching

A rapidly falling barometer indicates decreasing atmospheric pressure, which is a reliable sign that a storm or deteriorating weather is on the way.

Which cloud type is associated with thunderstorm development and should prompt boaters to seek shelter?

Answer: Cumulonimbus

Cumulonimbus clouds are tall, anvil-shaped thunderstorm clouds that signal dangerous lightning, strong winds, and heavy rain.

What is the general rule about how quickly a squall line can reach a boater after it is spotted on the horizon?

Answer: It can arrive within minutes depending on wind speed

Squall lines can move extremely fast — sometimes exceeding 60 mph — so they can reach a boater within minutes after being spotted.

On Alabama waterways, afternoon thunderstorms are most common during which season?

Answer: Summer

Summer heat causes intense daytime heating that triggers frequent afternoon thunderstorms, making them most common during summer months in Alabama.

If you are caught on open water when lightning begins, which action reduces your risk?

Answer: Get low in the boat and stay away from metal objects

Getting low in the boat and avoiding metal objects minimizes your profile and reduces the risk of being struck by lightning.

What wind speed generally indicates small craft advisory conditions?

Answer: 18–33 knots

Small craft advisories are issued when sustained winds reach 18–33 knots, which can create hazardous conditions for small boats.

What should a boater do if the sky suddenly turns a greenish or yellowish color?

Answer: Head to shore immediately as severe weather may be imminent

A greenish or yellowish sky can indicate a severe thunderstorm or tornado is nearby, requiring immediate return to shore.