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Flashcards in JX102 Deck (28)
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1

What properties are used to locate and classify fronts?

Temperature, dew point, pressure, wind

2

What parameters of an air mass are generally uniform when measured across a horizontal plane?

Temperature and moisture

3

How will the winds shift during a cold front passage?

SW to NW

4

Squall lines generally develop where?

50 - 300 miles ahead of the cold front

5

How far ahead of a warm front can the associated cloud system reach?

500 to 700 miles

6

When encountering a stationary front, you can expect a ______° wind shift since surface winds tend to blow parallel on both sides of the front.

180

7

When flying through an occluded front, you can expect weather associated with ______ fronts.

both cold and warm

8

The most severe weather with respect to an occluded front is generally located ______ NM south to ______ NM north of the frontal intersection.

100; 300

9

A(n) ______ front usually has no clouds or precipitation.

inactive

10

The area that encompasses the weather located on either side of a front is called the ______.

frontal zone

11

Every front is located in a _______.

low-pressure trough

12

What kind of frontal system is depicted by the purple symbols in this graphic?

Occluded front

13

Which frontal system has a steeper slope?

A cold front

14

A line of violent thunderstorms that forms ahead of a cold front are known as ______.

squall line

15

How does the wind normally shift with the passage of a warm front?

SE to SW

16

What type of weather is usually associated with a stationary front?

Weather similar to a warm front, but usually less intense

17

What classifies an air mass?

An air mass is a large body of air that has essentially uniform temperature and moisture conditions in a horizontal plane.

18

What type of air will have a greater potential for producing clouds and precipitation (dry/moist)?

Moist air

19

What indicates stability of an air mass?

Temperature!
Warm air masses bring stable conditions, while cold air masses are inherently unstable.

20

Where is the most severe weather located in relation to a front?

Most active weather is focused along and either side of the surface front and the frontal zone

21

How are fronts named?

Fronts are named according to their associated temperature change.
For example, if the temperature is warmer after frontal passage, it is a warm front.

22

Three characteristics of fronts are:

1. Fronts are always located in a trough of low pressure.
2. Cold fronts generally move faster than warm fronts
3. Frontal passage usually is accompanied by a 90° shift in wind direction

23

What is a good indicators of frontal intensity?

The amount and rate of temperature change

24

Stratiform clouds will usually produce what type of precipitation?

Steady precipitation and little or no turbulence

25

Cumuli clouds will usually produce what type of precipitation?

Showery precipitation and turbulence

26

The speed of frontal movement affects the weather associated with it. Faster moving fronts are generally accompanied by a narrow band of more ______ weather

Servere

27

The greater the contrast in the temperature and moisture between the two air masses, the greater....?

the greater the possibility of weather associated with a front, particularly severe weather.q

28

What is associated with an inactive front?

No clouds and precipitation. Inactive fronts are also called dry fronts.