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Private/commerical > Weather > Flashcards

Weather Flashcards

1
Q

High pressure air

A

Dry descending air down word and outward that moves clockwise

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2
Q

Low pressure air

A

Move upwards and then words counterclockwise typically brings poor weather

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3
Q

Troposphere

A

is where most weather occurs

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4
Q

Standards of weather

A
  1. 92 inches of mercury

1013. 2 millibars

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5
Q

Mechanical turbulence

A

Caused by air moving around
Buildings
Windshear

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6
Q

Low level windshear

A

Sudden change in wind speed and direction

Caused by changing fronts
thunderstorms
Temperature inversion

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7
Q

Microburst

A

Severe lower level windshear

Last for 5 to 15 minutes and 5000 ft./min. winds

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8
Q

Radiation fog

A

CAlM nights no wind
Ground is cold air is warm
Dissipates quickly

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9
Q

Advection fog

A

Warm moist air moves on cold surface

Needs wind for fuel and last many days

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10
Q

Upslope fog

A

Warm moist air up mountain

Requires wind for fuel last many days

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11
Q

Steam fog

A

Warm moist air evaporates to cool dry air

Coffee fog

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12
Q

Stable air mass

A

Stratus clouds poor visibility steady precipitation

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13
Q

Unstable air mass

A

Cumulus clouds good visibility shower and precipitation

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14
Q

Cold front

A

Cold air replaces warm air
Moves faster than warm air and is steeper
Brings storms and gusty wins

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15
Q

Warm front

A

Slow and warm slide up and over cold air

Low ceiling and poor visibility

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16
Q

Stationary fronts

A

Slowly dying Front
last a couple days
mix of warm and cold front

17
Q

Occluded front

A

Warm and cold front moving together

Points of intersection is worst area for weather

18
Q

Thunderstorms

A

Avoided by 20 miles minimum
Requires lifting action
moisture in air and unstable lapse rate

19
Q

Cumulus stage

A

Updrafts of wind

20
Q

Mature stage

A

Rain touches the ground most violentStage

21
Q

Dissipating stage

A

Microbursts and rain

22
Q

Rime ice

A

Forms on leading edge as water freezes on impact

23
Q

Clear ice

A

Most dangerous and disturbs airflow

Moves back and freezes on upper surface

24
Q

Mixed ice

A

Combination of Rime ice and clear ice

Private/commerical (25 decks)

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