weather test 4

The large thermally driven convection cell that is created by towering cumulus clouds is the

hadley cell

The intertropical convergence zone ITCZ is a region where 

air is rising 

In terms of the three cell model of the general circulation, areas of surface low pressure should be found at 

the equator and 60 degrees latitude

The majority of the US lies within which wind belt

Westerlies

The worlds deserts are found at 30 degrees latitude because

of the sinking air of the subtropical highs

What causes the downdraft in the mature stage of a single cell thunderstorm

Falling precipitation

which of the following is considered to be a boundary between two different air masses

stationary front

The greatest contrast in both temperature and moisture will occur along the boundary separating which air masses

Maritime tropical and continental polar

What can happen when gust fronts from multiple thunderstorms merge

Mezoscale convective system

What type of air mass would be responsible for hot, muggy summer weather in the midwest

maritime tropical 

What type of air mass would be responsible for persistent cold, damp weather with drizzle along the east coast of north america

maritime polar 

If an observer sees cirrus clouds, followed later by cirro stratus, and then alto stratus they are witnessing the approach of a ______ front

warm

A wind shift from south or southwest to northwest is commonly associated with the passage of a ________ front.

cold

When an active cold front overtakes a warm front ________

Accluded front

Along the boundary between cP and mT air masses, ________ is often found.

front

Which of the following is NOT a condition under which air mass wind shear occurs

Answer that does not say inversion 

Low level wind shear tends to _____ a warm frontal passage and _____ a cold frontal passage.

be 6 hours after and 1-3 hours after

The main difference between a downburst and a microburst is:

size

When comparing an average cold front to an average warm front, which of the following is NOT correct?

Any answer that does not say cold dry north/northwest OR hot moist south/southwest

Turbulence within thunderstorms is most intense

Boundary from downdraft to updraft

The magnitude of turbulence depends on:

Difference in wind speeds turbulence

Low level turbulence includes

Low level wind sheer, air mass, thunder storms, and downbursts

What type of weather front would be responsible for the following weather forecast? "Increasing high cloudiness and cold this morning. Clouds increasing and lowering this afternoon with a chance of snow or rain tonight. Precipitation ending tomorrow morning. Turning much warmer. Winds light easterly today becoming southeasterly tonight and southwesterly tomorrow.”

Warm frontal transition 

Relief from thermal turbulence can be found above

the convection 

A small thunderstorm cloud with virga falling out of its base and blowing dust at the ground could warn of severe hazard to an airplane because:

microburst or a downburst

Which fog forms when warm, moist air moves horizontally over a colder surface like cold ground or water

steam fog

Which fog forms when cold, dry air moves over a warm, wet surface such as a lake or after rain?

frontal fog

In winter, thunderstorms are most likely to form along

cold fronts

A sea or land breeze is caused by

Thermal difference between land and sea

When a cold front passes through an area, which set of changes is most likely to occur?

Warm most air with southwest wind to cold dry air with wind from the northwest

What type of fog forms as moist, stable air moves upwards along terrain?

Terrain fog

Thunderstorms which produce tornadoes:

Supercell thunderstorm, thunderstorm with a tilted updraft down draft pair, looking for words like super cell and up draft downdraft pair

What actions should a pilot take when encountering a microburst on approach

As soon as i start rising above the glide slope pull stick back sharply and put full power 

All thunderstorms require:

Moisture and unstable air 

Flying thorough a downburst a pilot can expect:

increased airspeed and lift, strong headwind, followed by sudden downdraft and loss of airspeed and lift

A bow echo (shaped like an bow on radar) is dangerous and can cause tornadoes

true

What does AO2 signify in a METAR

Precipitation discrimination and an automated report

Do urban heat islands generate surface highs or surface lows?

Surface lows

The coldest temperatures would most likely at position (1, 2, 3, 4) (circle the correct answer)

4

Falling pressure would probably be observed at (1, 2, 3, 4) (circle all that apply)

2

Heavy snow would most likely be observed at (1, 2, 3, 4) (circle the correct answer)

3

Which type of thunderstorm forms when strong directional wind shear creating a rotating updraft?

Supercell

A warm front has more severe weather than a cold front when it is passing

false

What is the difference between a single-cell and a supercell thunderstorm?

tilted updraft downdraft pair

Which stage of an air mass thunderstorm is marked by precipitation falling to the ground?

mature phase

Where does Clear Air Turbulence Occur?

at or near jet streams

What is the life cycle of a single cell thunderstorm?

cummulance, mature, dissipating

What type of front typically occurs behind a squall line?

cold front

What are the characteristics of a continental polar air mass in the summer?

dry and cool not as cold

In a low pressure system convergence occurs

at the surface

What are the characteristics of a Severe Thunderstorm?

Surface winds gusting 50 knots or higher. · Hail of 3/4 inch diameter surface or larger. · Tornadoes. · Line, embedded, or area thunderstorms

What are the types of cooling fogs?

Advection, Frontal, Steam

What causes the downdraft in the mature stage of a single cell thunderstorm?

rain

The wind speed generally increases with height above earth’s surface because

friction disappears

_______ ice is the most dangerous type because it forms as water droplets impact an aircraft, freeze slowly and spread over the aircraft components

clear