Tornadoes Flashcards

1
Q

A rapidly rotating column of air that blows around a small area of intense, low pressure with a circulation that reaches the ground

A

Tornado

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2
Q

tornadoes form

A

In association with cumulonimbus clouds
Form when mT air masses and cP air masses, interact
Form after a meso cycle phone is produced

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3
Q

vertical cylinder of rotating air that develops in the updraft of a severe thunderstorm

A

Mesocyclone

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4
Q

Different wind speeds, or directions at different heights in the atmosphere

A

Windshear

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5
Q

Differences in wind, speed or direction produce rolling motion about a horizontal axis

A

Mesocyclone stage one

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6
Q

Strong updrafts tilt the horizontally, rotating air vertically

A

Mesocyclone stage two

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7
Q

vertically rotating column of air, Tightens and spin faster

A

Mesocyclone stage three

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8
Q

Area of rotating clouds that extends we need a thunderstorm from which a funnel may form

A

Wall cloud

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9
Q

Tornado that hasn’t made contact with the ground

A

Funnel cloud

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10
Q

tornado frequency

A

Tornadoes most common in Spring April to June
Contrast between mT and cP air masses, strongest
Tornadoes most common in late afternoon

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11
Q

Month with most tornadoes

A

May

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12
Q

Month with most tornado days

A

June

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13
Q

Texas, Oklahoma, Kansas, Nebraska
States that experience more frequent tornadoes

A

Tornado alley

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14
Q

Mississippi, Alabama, Louisiana, Arkansas, Tennessee
Gulf coast states that experience more frequent destructive tornadoes

A

Dixie alley

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15
Q

dimensions of a typical tornado

A

Diameter 500 to 2000 feet
Path length 1 to 4 miles
duration 10 minutes
Speed of storm 30 mph
Speed of wind 65 mph to 310 mph
Direction southwest to northeast ahead of cold front

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16
Q

based on damage indicators
Used to estimate the strength of a tornadoes winds

A

enhanced fujita scale

17
Q

what percent of tornadoes are EF 0-1

A

69%

18
Q

what percent of tornadoes are EF4 -5

A

2%

19
Q

Where to predict tornadoes

A

Norman Oklahoma

20
Q

Conditions are favorable for tornado formation

A

Tornado watch

21
Q

Tornado seen or detected by radar

A

Tornado warning

22
Q

hook shaped on radar image, indicating tornadic rotation

A

Hook echo