Weather Fronts

When a cold air mass meets a warm air mass and they don’t mix, what is formed at the boundary between them?

• A storm

• A front

• A jet stream

• A low pressure system

What weather conditions are typically associated with the passage of a warm front?

• Rapidly clearing skies and strong winds.

• light to moderate precipitation, and poor visibility.

• Intense thunderstorms, hail, and potential tornadoes.

• Prolonged periods of stable, clear weather.

After a warm front passes, the skies usually become clear and sunny, and temperatures rise as warm air moves in.

Based on this description, what likely happens to the air pressure in the area?

• Air pressure increases because clear skies are linked to high pressure.

• Air pressure decreases because warm air makes pressure lower.

• Air pressure stays the same because fronts don’t affect pressure.

• Air pressure rapidly drops as clouds move out.

Which of the following weather phenomena can be associated with a cold front, especially depending on its intensity?

• Light drizzle and improving visibility.

• Prolonged periods of fog and stratiform clouds.

• Lightning, thunder, hail, and tornadoes.

• Steady, continuous rain over a wide area.

After a cold front moves through, heavy rain or thunderstorms usually end, and the skies clear up as a cool, dry air mass takes over.

Based on this description, what likely happens to the temperature and air pressure in the area?

• Temperature rises and air pressure decreases.

• Temperature rises and air pressure increases.

• Temperature drops and air pressure decreases.

• Temperature drops and air pressure increases.

A stationary front forms when a warm air mass and a cold air mass meet but neither one moves the other.

What kind of weather conditions are most likely to occur in an area experiencing a stationary front?

• Clear skies and rising air pressure because one air mass pushes the other away

• Rapid temperature changes and strong winds as the air masses mix quickly

• Days of cloudy skies and steady rain or drizzle because the front stays in place

• Hot, dry weather with high pressure and sinking air

What is the primary characteristic of a stationary front?

• A warm air mass rapidly displacing a cold air mass.

• A cold air mass quickly pushing warm air upwards.

• Two air masses with roughly equal opposing forces, leading to prolonged weather.

• A fast-moving cold front catching up to a slower warm front.

How does an occluded front typically form?

• A warm front and a cold front moving in parallel directions.

• A faster-moving cold front catching up to and merging with a slower-moving warm front.

• Two air masses of equal strength meeting and remaining static.

• A single air mass cooling rapidly over a large area.

As a pilot approaches an occluded front, they often see a wide band of clouds and steady precipitation because warm, moist air is being lifted above cooler air masses.

In a cold occlusion, the pilot would pass through colder, denser air behind the front, while in a warm occlusion, the air behind the front is cooler but not the coldest.

True or False:

From a pilot’s point of view, a cold occluded front brings a sharper temperature drop and more turbulence than a warm occluded front.

• True

• False