Exam #2 Lab Test

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on the 500 mb map

-13

If this air rises as saturated air... curved blue saturated adiabatic lapse

-25

Continue the ascent to 500 mb

-27

If this air rises as unsaturated dry air..... straight green dry adiabatic lapse rate line

-35

Between 16Z 15 Feb to 02Z 16 Feb, the air pressure change was approx _____ mb.

-5

the dewpoint at 500 mb

-57

as the ontario low decayed and moved ne

-6.7

At 02Z 16 February

1008

Pittsburgh sits between two distinct air masses. Temperatures to the west were mostly in the _____ F, while the other

0s to 20s .... 30s to 40s

Two arrows on the column circle are along the direction

1 and 5

Throughout this saturated portion of the ascent

100%

the relative humidity

100%

Because temp and dewpoint were close in proximity

100% fewer

The air pressure for Pittsburgh, PA was 105, meaning the air pressure was _______mb, well above the values in the Plains.

105.5

Using figure 5a-6, over florida, the atmosphere exerted a pressure of 200 mb at an altitude of approx _______m above sea level.

12,200

While the dewpoint changed most dramatically, so did the temperature.

13

Focus on the other four wind arrows for positions

2

Assume that all the water that condensed during the ascent was immediately lost as precipitation from the parcel

27

doppler radar only detects motion

3

For the two arrows partly away from the radar, add half length

4

the wind at midland odessa

45

by the time of fig 7a-2, 11 hrs after

50

Imagine you are piloting a plane flying from Florida to New York.

500

the air mass on the western flank of the atlantic anticlyclone

50s

The true altitude of the plan over New York is about ______m.

5500

recalling that the heights plotted at individual stations on

5720

Still comparing the two dewpoint temp profiles

Dallas ft worth

Compare the two dewpoint temp profiles

Denver

Directly below the first graph, above the middle graph, on the meteogram are sky cover

North

Conversely, if you fly from den to dallas while maintaining an altitude of 31,000 ft

gradually increase

Becoming saturated at 800 mb

equal to

The height contour pattern

a deep trough

Compare the altitudes of pressure levels from the two soundings. At _____ the pressure was slightly higher altitudes

all of the above

the observed wind direction at fargo

at an angle

The observed wind direction at LR was

at an angle to

Radar shading indicate precipitation

both a and b

Comparing the two temperature profiles, the atmosphere from 700 mb to about 250 mb was cooler above which station?

both stations

the horizontal pressure gradient

central and northern plains

the air flow at fargo

clockwise and inward

The temp and dewpoint curves below 450mb were _____

closer together

The cloud in the bottle disappears when the temp increase by _____.

compression

Most clouds in the atmosphere form in a similar way.

condenses

Air forced to rise above detroit would

cool by expansion

the thin blue arrow prespsents the ____ force

coriolois

consider the LR conditions

counter clockwise and inward

Wind directions in the several state area around the L were generally

counterclockwise

with you r cards again in the same position

curved

now imagine yourslef above the north pole

curves to the left

now imagine yourslef at the south pole

curves to the right

The air pressure in millibars

decreased

The cloud formed when the pressure acting on the saturated air lowered and the temp _____.

decreased

The top graph has three lines. The dewpoint _____ as the low pressure and fronts approached ....

decreased

Air pressure in the atmosphere always decreases when altitude increases because air pressure is determined by the weight of the overlying air.

decreases... increases

cold dry air is

denser than

Furthermore, the radar returns in eastern Michigan

did

The sky cover from detroit north to ontario

did

Where radar indicated precipitation along the front

did

this sky cover condition confirmed that saturated air

did

From one location to another

diff

the green and red radical velocity

do

Compare the lines of equal pressure you drew on Figure 5a-5 and Figure 5a-6

downward

Low pressure areas tend to have clouds because there the air experiences motion in the upward direction.

downward

The constant pressure surface in the atmosphere is the level where air pressure is the same.

downward

As this air rises, assume it becomes saturated at 800 mb.

dry

add a smaller arrow

east

comparing fig 7a-1 and fig 7a-2

east

draw a second arrow from fargo

east

the force acting on the wind flow at LR

east northeast

Figure 5A-1 shows one tall red block and one short blue block side by side on their square bases on the flat horizontal surface of a table T. Because both block weigh the same and their bases are the same size, the block exert _______ pressure on table T.

equal

In figure 5A-4, the pressure exerted on the table by the red stack is _______ to the pressure exerted on the table by the blue stack.

equal

The pressure exerted on the table by the red stack is _______ to the pressure exerted on the table by the blue stack.

equal

ascending unsaturated air

expands

As the cold front passes your location, the temperature would ______.

fall

As the cold front moves toward and passes your location, the air pressure would _____.

fall then rise

fig 8a-5 also shows that

faster

Which of the following weather types was NOT reported in Figure 5b-2?

freezing rain

because these were surface winds

friction

Another identical block is added to each stack.

greater

From figure 5b-1 and figure 5b-2, you can conclude that the low pressure system _____ passed through Pittsburgh.

had already

You flew along a constant pressure surface which is at a ______ altitude in warm air than in cold air.

high

The temp curve in dalls ft worth

high level clouds

As you approach Dallas-ft. Worth, your airplane would be at a ____ altitude than indicated by your air pressure altimeter when you were over Denver.

higher

The temperature and dewpoints in Denver begin much higher on the chart than Dallas-Ft. Worth because Denver, is at much _____ elevation

higher

Because of the slope of the equal pressure lines

higher than

This parcel's final temp is

higher than

This temperature is ____ the temperature achieved by the unsaturated parcel that

higher than

this arrow represents the diection of

horizontal pressure

In both fig 6b-1 and fig 6b-2

immediately along ... cooler

the wind direction form the station model

in the opp

Compressing the air by squeezing the bottle forced the temp of the air inside the bottle to _____.

increase... decrease

Starting at the table T and moving upward in Figure 5a-4, the difference in downward pressure on imaginary surfaces 1 and 2 exerted by the overlying portions of the two stacks _______.

increases

warmer air rising above a front expands

increases

the frictional force added to the pressue gradient

inward

On imaginary surface 2, the downward pressure exerted by the blue block is _____ the pressure exerted by the red blocks.

one-third

using the 500 mb station values

jackson

the effect of earths rotation on

left...right

Begin once again with an unsaturated air parcel at 17

less than

The relative humidity of this air parcel is now ___ what it was when it began

less than

If condensation occurred during the ascent from 800 to 500

lost

_____ pressure

low

Recall from investigation 5a the profiles for florida and new york over a similar latitude range

lower

point d shows the effect of friction on moving air

lower

At 500 mb, the temperature of the unsaturated air parcel is _____

lower than

Relying on the pressure altimeter, you fly toward New York along a constant pressure level with an indicated altitude of 5800m

lower than

on fig 8a-1 draw an arrow

lowest

In fig 7a-3 yellow to dark red generally

matches

from table 8a-2

midland odessa

from the table

midland odessa

both the detroit and lexington ky reported

mist and fog

Figure 5a-5 is a side view of the two stacks of pressure blocks, the same blocks seen in the previous figure.

more

This comparison demonstrates that rising unsaturated clear air cools_____

more

in fig 7a-2

more

At upper levels, wind directions are also related to the ocntours

more parallel

the spacing of isobers

nebraska and iowa

LR, AR was still under the influence

north

in fig 7b-2b

north northeast

the area of radical precipitation blowing

north northwest

The plottled pressure at fargo

northwest

as further eidence

opposite of

the detroit station model showed the cloud cover as

overcast

from point c and onward

parallel

the gray area of 0 doppler wind speed occurs where the radar beam is

perpendicular

the moving air parcel follows

pressure gradient

What were the weather conditions at Pittsburgh

rain

in fig 7a-3 the extended line of blues

rainy

The change from the initial parcel temp to the final parcel temp

releases

On fig 8a-3 consider an air parcel

right

As the air parcel continues to rise above 800 mb

saturated

From near the 450 mb pressure level upward into the tropopause

saturated

On the stive diagram the black cures represent

saturated

In the _______ stack, the pressure decreases more rapidly with height.

short, more dense blue

The atmosphere above Long Island, NY

slightly inclined

the friction force at fargo

south

imagine a straight arrow from the pittsburgh

southwest

From 16Z 15 February to 02Z 16 Feb

steadily falling

orient the cards as shown in fig 8a-2aii

straight

you drew a line on a path both straight and curved at the same time

straight...curved

The winds circulating around

the same

On imaginary surface 1 in figure 5a-4, the pressure exerted by the overlying blue block is ______ the pressure exerted by the overlaying red blocks.

three-fourths

The green arrows depict air motions

true

The red arrows depict air motions

true

in position 3 the dopple wind

true

The short block occupies half of the volume as the tall block while containing an equal mass. Because density is a measurement of mass per unit volume, the blue block is _______ as dense as the red block.

twice

In Figure 5A-2, the amount of pressure exerted on table T by each stack is _______ amount of pressure on the table exerted by each single block.

twice the

Dallas - Ft. Worth, TX is situated just north of post - Tropical Cyclone Beta

warmer and drier

In fig 6b-1

was likely to be

In the top graph, from the beginning to the end, there ____ a direct association.....

was.... was

As the low pressure aproached during this 24-hr period, winds were generally _____, indicating a less steep gradient in air pressure.

weak

The reflectivity in fig 7b-2a

were not

Prevailing upper level winds blow

western


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