chapter

Question 1

it remains the one of the most useful charts for ascertaining current weather conditions just above the surface of the earth for a large geographic region. These maps are called

Answer 1

surface analysis

Question 2

surface analysis charts if they contain…………………………… and……………………………..

Answer 2

fronts and analyzed pressure fields

Question 3

surface analysis charts if they contain fronts and analyzed pressure fields, with the solid lines representing

Answer 3

isobars.

Question 4

The word “synoptic “ is derived from

Answer 4

syn meaning the same or together and “optic” meaning visible

Question 5

The weather data from each reporting station are plotted around these circles on these base maps in a particular systematic fashion

Answer 5

station model

Question 6

air temperature and dewpoint temperature are reported in

Answer 6

whole (or integer) Fahrenheit degrees

Question 7

the current near-surface air temperature and dewpoint temperature are reported in whole (or integer) Fahrenheit degrees. These temperatures are measured by instruments located in a standard instrument shelter at a height of approximately

Answer 7

5 feet above the ground

Question 8

The value of the dewpoint may never exceed

Answer 8

the air temperature

Question 9

wind speed and wind direction , are represented on the map by a combination of

Answer 9

a wind arrow shaft and wind barbs around the station model

Question 10

These wind data are obtained from

Answer 10

a standard “anemometer height” of approximately 30 feet above the ground

Question 11

the orientation of these wind arrows on the map indicates the wind direction to the

Answer 11

nearest 10 degrees

Question 12

the orientation of these wind arrows on the map indicates the wind direction to the nearest 10 degrees, measured …………….. from …………………………………

Answer 12

clockwise from true north

Question 13

By meteorological convention, the winds are named for the direction ………………………which they are blowing. Hence, a south wind is from ………………………………

Answer 13

from

the south

Question 14

The number and length of the barbs on the tail of the arrow indicate the near-surface wind speed in

Answer 14

knots

Question 15

nautical miles per hour, which are ……………………………..than the familiar statute miles per hour

Answer 15

15% larger

Question 16

The current sea level corrected air pressure is plotted on the map to the upper right of the station model. The numeric pressure entries are in units of

Answer 16

tenths of millibars

Question 17

The barometric pressure measured by a barometer at the station is………………………………………………..to eliminate the variations in reported pressure due to the …………………………………….of the station.

Answer 17

adjusted (or corrected) to sea level conditions

altitude

Question 18

The amount of shading inside the station location circle is used

Answer 18

to depict sky cover, or the total fraction

Question 19

usually refers to the sequence of operations involved with the organization of the plotted information on the weather map.

Answer 19

weather analysis

Question 20

a major part of the analysis phase involves drawing

Answer 20

isopleths

Question 21

lines connecting points of equal values

Answer 21

isopleths

Question 22

While weather elements, such as temperature and pressure, are observed only at particular locations, we can assume that these elements are continuously distributed in the horizontal direction

Answer 22

meteorological field

Question 23

Many of the surface analysis charts may contain……………………….to depict the features of the horizontal pressure field at …………………..

Answer 23

thin solid lines

mean sea level

Question 24

H is colored

Answer 24

blue

Question 25

L is drawn in

Answer 25

red

Question 26

A trough of low pressure that contains

Answer 26

significant weather phenomena

Question 27

A trough of low pressure that contains significant weather phenomena (such as precipitation and distinct wind shifts) may be identified on the map by a

Answer 27

thick brown dashed line running along the axis of the trough

Question 28

temperature isopleth name:

Answer 28

Isotherms

Question 29

Dew point isopleth name

Answer 29

Isodrosotherms

Question 30

pressure isopleth name

Answer 30

Isobars

Question 31

pressure change isopleth name

Answer 31

Isallobars

Question 32

Wind speed isopleth name

Answer 32

Isotachs (Isovel)

Question 33

Wind direction isopleth name

Answer 33

Isogon

Question 34

Rainfall isopleth name

Answer 34

Isohyet

Question 35

cloud amount isopleth name

Answer 35

Isoneph

Question 36

Blue color:

Answer 36

snow and cold fronts

Question 37

Red color:

Answer 37

Stratus cloud and warm fronts

Question 38

yellow:

Answer 38

fog

Question 39

brown

Answer 39

stratocumulus cloud

Question 40

purple:

Answer 40

occluded front

Question 41

black

Answer 41

troughs

Question 42

green

Answer 42

rain/drizzle

Question 43

The standard unit of pressure is millibars (mb or hectopascals-hPa) of which sea level is around

Answer 43

1015 mb

Question 44

Because gravity decreases slightly with height, a modified type of height called ……………………………………is used that takes the variation of ………………………into account

Answer 44

“geopotential height”

gravity

Question 45

most meteorological heights are strictly in units of

Answer 45

geopotential meters