Questions weather Flashcards

1
Q

Ambient lapse rate

A

rate of decrease in temperature with altitude. Stability can be determined

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2
Q

unstable cold airmass moving to warm area.

A

Cumuliform clouds, turbulence and good visibility

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3
Q

Unstable air means

A

Cumuliform clouds,
showery precipitation,
turbulnace,
good visibility

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4
Q

Lenticular altocumulus clouds

A

created by on the crest of waves created by the barrier in the wind flow.
very Strong turbulence

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5
Q

Jet stream

A

high altitude, may be marked by cirri form clouds

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6
Q

Small or huge temp. change in stratosphere (above the stratosphere)

A

small

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7
Q

Form of advection fog

example

A

Moist air moves over colder ground to water

for example: an air mass moving inland from the coast in winter

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8
Q

Temperature inversion

A

is standard lapse rate and stable air

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9
Q

Wind necessary for which type of fog

A

advection and upslope

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10
Q

Why at 5000 ft wind is from southwest but surface is from south

A

Coriolis force deflected by surface friction

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11
Q

4 families of clouds

A

High, Middle , Low and extensive vertical development

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12
Q

cumulus clouds indicate

A

good visibility, turbulence at and below level clouds

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13
Q

feature associated to tropopause

A

abrupt change in lapse rate and hight is 20000 to 65000

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14
Q

Wind speed of jet stream

A

50 knots

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15
Q

unstable airmass is forced to ascend a mountain slope

A

clouds with extensive vertical development

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16
Q

flying and encountered wet snow, it means

A

temperature is above freezing, sublimation is happening, and snow is melting

17
Q

warm rain fall though cool air near the surface and fog happens in

A

cold frontal

18
Q

Average hight of the troposphere in the middle latitude

A

37000

19
Q

The layers of of atmosphere from the earth’s surface

A

troposphere, stratosfere, mesosphere

20
Q

frontal system and clouds, pressure and wind

A

Clouds: make gradual or abrupt
Clouds: not all frontal systems
Wind: change in direction, speed

21
Q

inversion

A

Increase in temperature with altitude

often happens near the ground on clear cool night with light wind

22
Q

Cumulonimbus vs towering cumulus. Which one has the greatest turbulence

A

cumulonimbus

23
Q

Lentocular clouds in mountainous areas means

A

turbulence

24
Q

frontal waves normally form on

A

slow moving cold fronts or stationary fronts.

25
Q

Convective turbulence almost always present

A

During warm summer afternoon when winds are light

26
Q

temperature inversion Why and expect?

A

increase temperature with altitude
clear night and wind is light
lowest few thousands feet above the ground. wind shears will be seen and generates turbulence

27
Q

Dry Adiabatic lapse rate is

A

3 Celsius every 1000ft

28
Q

Radiation fog

A

Warm, moist air over low flatland areas on calm nights

29
Q

weather conditions when there is a low level temp. inversion

A

smooth air, low visibility due to haze, fog, low clouds

30
Q

Growth rate of precipitation

A

upward currents

31
Q

strength and location of jet stream

A

strong in winter and shifts farther south un winter.

weaker in north in the summer time

32
Q

Clouds, fog and dew always will form

A

water vapor condenses