Fundamentals of Weather Flashcards

1
Q

What is the jet stream?

A

Narrow, high-speed, meandering river of wind, usually west to east

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2
Q

What speeds does the jet stream have?

A

Summer 30-100 knots

Winter 100-200 knots

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3
Q

What is the freezing level?

A

Altitude where temperature is 0 Centigrade

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4
Q

What is a temperature inversion?

A

When temperature increases with altitude

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5
Q

Does warmer or colder air hold more moisture?

A

Warmer air holds more moisture

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6
Q

What is a dew point?

A

Temperature at which air would become saturated by water vapor already in air

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7
Q

What is a convective current?

A

Air movements (usually vertical) caused by uneven heating of Earth’s surface

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8
Q

What causes wind movement?

A

Flow of air from high pressure to low pressure

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9
Q

Which has better flying conditions, high or low pressure?

A

High pressure - denser air, less precipitation

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10
Q

What is a weather front?

A

Interface between two air masses of different temperatures

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11
Q

Name and identify 4 types of fronts

A

Cold front - advancing cold air mass
Warm front - advancing warm air mass
Stationary front - little or no movement
Occluded front - cold air overtaking warm air

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12
Q

What 2 weather changes are common with fronts?

A

Wind changes, Pressure changes

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13
Q

What does nimbo or nimbus type cloud mean?

A

Precipitation cloud

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14
Q

What are the high feathery clouds called?

A

Cirrus

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15
Q

What is dangerous about Stratus and Nimbostratus clouds?

A

Hazardous icing conditions

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16
Q

What is hazardous about many varieties of Cumulus clouds?

A

Turbulence

17
Q

What is associated with Cumulonimbus Mammatus clouds?

A

Severe thunderstorms

18
Q

What is precipitation

A

Falling water in any form that reaches the ground