Exam #2 Lab Test
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
