Weather 4

Question 1

What information is provided by the Radar Summary Chart that is not shown on other
weather charts?

Answer 1

Lines and cells of hazardous thunderstorms

Question 2

What weather phenomenon is implied within an area enclosed by red scalloped lines on a U.S.
High-Level Significant Weather Prognostic Chart?

Answer 2

Moderate or severe icing

Moderate or Severe Turbulence

Question 3

The U.S. High-Level Significant Weather Prognostic Chart forecasts significant weather for
what airspace?

Answer 3

25,000 feet to 63,000 feet.

Question 4

What is the upper limit of the Low Level Significant Weather Prognostic Chart?

Answer 4

24,000 feet.

Question 5

A freezing level panel of the composite moisture stability chart is an analysis of

Answer 5

observed freezing level data from upper air observations

Question 6

The difference found by subtracting the temperature of a parcel of air theoretically lifted from
the surface to 500 millibars and the existing temperature at 500 millibars is called the

Answer 6

lifted index

Question 7

Hatching on a Constant Pressure Analysis Chart indicates

Answer 7

windspeed 70 knots to 110 knots.

Question 8

What flight planning information can a pilot derive from Constant Pressure Analysis Charts?

Answer 8

Winds and temperatures aloft.

Question 9

From which of the following can the observed temperature, wind, and temperature, wind and temperature/dew-point spread be determined as a specific altitude?

Answer 9

Constant Pressure Analysis Charts

Question 10

The minimum vertical wind shear value critical for probable moderate or greater turbulence is

Answer 10

6 knots per 1,000 feet.

Question 11

When turbulence causes changes in altitude and/or attitude, but aircraft control remains positive, that should be reported as

Answer 11

moderate

Question 12

Turbulence that is encountered above 15,000 feet AGL not associated with cumuliform
cloudiness, including thunderstorms, should be reported as

Answer 12

clear air turbulence

Question 13

Which type of jetstream can be expected to cause the greater turbulence?

Answer 13

A curving jetsam associated with a deep low-pressure trough

Question 14

A strong wind shear can be expected

Answer 14

on the low-pressure side of a jetstream core where the speed at the core is stronger than 110
knots.

Question 15

The Low Level Wind Shear Alert System (LLWAS) provides wind data and software process to
detect the presence of a

Answer 15

change in wind direction and/or speed within a very short distance above the airport.

Question 16

One of the most dangerous features of mountain waves is the turbulent areas in and

Answer 16

below rotor clouds

Question 17

Weather Advisory broadcasts, including Severe Weather Forecast Alerts (AWW), Convective SIGMETs, and SIGMETs, are provided by

Answer 17

Air Route Traffic Control Centers (ARTCC)

Question 18

Frost covering the upper surface of an airplane wing Usually will cause

Answer 18

the airplane to stall at an angle of attack that is lower than normal

Question 19

The National Convective Weather Forecast is a supplement to but does not substitute for, the
report and forecast information contained in

Answer 19

Convective Sigmets

Question 20

Obtaining a weather briefing for a cross country flight. you receive what levels of convective activity in the convective outlook

Answer 20

Slight, Moderate and High

Question 21

You are planning a cross-country flight across the United States. The flighl will be divided into
several segments. For flight planning, time enroute fuel requirements and air circulation are essential. In which direction does the air circulate around a low in the Northern Hemisphere?

Answer 21

ln the Northern Hemisphere, the air in an area around a low is deflected to the right and
circulates counterclockwise

Question 22

Read MT 570 AT 159/65

Answer 22

The maximum tops of the cells Is Is 57,000 feet located 65 NM southeast of the station,

Question 23

KOKC 1934
LN STRW++/+ 86/40
164160 199/115 15W C2425 MT 570 AT 159/65 2 INCH HAIL

Answer 23

KOKC at 19342,

area of echos 8/10 coverage, very heavy rain showers,
area defined by 86 degrees at 40NM, 164 degrees at 60NM, and 199 degrees at 115NM,
area 15NM wide, movement from 240 degrees at 25 knots, maximum tops 57,000 feet located at 159
degrees at 65NM, and 2 inch hail.

Question 24

How Jong is the forecast of a Convective SIG MET valid for?

Answer 24

2 hours

Question 25

Decode

UA/OV SUX 18025/TM1340/TP PA34/ SK OVC 025/WX FV04SM RA HZ/WV 23015KT/TB LGT/RM LGT Rain

Answer 25

SK: Sky Condition
Overcast 2500
Later top at 4500
BKN 7300
TOP085 Later top at 8.500
SKC: Sky clear

Question 26

What weather phenomenon is implied within an area enclosed by bold yellow dashed lines on a
U.S. High-Level Significant Weather Prognostic Chart? [

Answer 26

Moderate or severe turbulence and icing

Question 27

You are planning a trip for the followlng day. Which weather chart would be most appropriate
for determining frontal locations along your intended route at the time of your flight?

Answer 27

Significant Weather Prognostic Chart

Question 28

What weather phenomenon is implied within an area enclosed by a bold green solid line of a
U.S. Mid-level Significant Weather Prognostic Chart?

Answer 28

Jet stream axis.

Question 29

FEW020 WS010/31022KT

Answer 29

Wind shear is reported at 1,000 feet AGL from 310 at 22 knots

Question 30

On a flight from east to west in the northern hemisphere, where a high pressure system exists
north of your route, the most favorable winds would exist

Answer 30

to the south of the high pressure system