meteorology 2 Flashcards

1
Q

how is the data measured

A

surface measurements

weather balloons

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2
Q

how often do they gather weather data

A

every 6 hours

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3
Q

taken in degrees and dew point
taken in the shade
no wind
6feet above grass

A

temp and dew point

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4
Q
usually in millibars 
pressure is abbreviated 
1013.2 on the model becomes 132
998.2 on the model becomes 982can also be in inches of mercury 
29.92 is sea level
A

pressure

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5
Q

large chunk of air that acquires characteristics of location
temp
moisture

A

air masses

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6
Q

warm

A

tropical

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7
Q

cold

A

polar

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8
Q

dry

A

continental

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9
Q

moist

A

maritime

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10
Q

boundary between 2 different air masses
air masses collide and the weather can change dramatically
fronts are always attached to low pressure, never high pressure

A

front

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11
Q

types of fronts

A

cold fronts
warm fronts
stationary

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12
Q
pressure rises 
temp drops 
winds shift to the north 
rain 
cumulonimbus clouds
A

cold fronts

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13
Q
pressure drops 
temp increases 
winds shift to the south 
rain is produced 
Stratiform clouds 
cirrus, altostratus, stratus and nimbostratus
A

warm front

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14
Q

neither cold nor warm air is advancing
soaking rains produced
nimbostratus clouds

A

stationary front

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15
Q

show the pressures across the country by using isobars
show the pressure
usually in inches or millibars
every point along isobars the exact same pressure

A

pressure maps

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16
Q

the change in pressure between isobar lines
common interval is 4 or 5 millibars or .10 inches
isobars never cross or touch

A

isobars interval

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17
Q

clear skies above the high pressure
winds move in a clockwise direction
cool air is sinking from upper atmosphere
pressure values decrease away from pressure center
no fronts

A

high pressure

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18
Q

an educated prediction of the future weather
based on observation
climate
General trends
our weather systems move from west to east
move about 1/3 of US in 24 hours

A

forecast

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19
Q

cloudy skies
warmer temps
lower pressures
winds rotate counter-clockwise

A

low pressure

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20
Q

clear skies
lower temps
higher pressure
winds rotate clockwise

A

high pressure

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21
Q
rain 
cloudy skies 
warmer temps 
lower pressure 
higher dew points 
south winds
A

warm fronts

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22
Q

typical cyclone
area of very Low pressure
winds rotate in a counter clockwise direction
originate off the west coast of Africa as thunderstorms

A

hurricane

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23
Q
over warm water - typical 80°
high humidity 
low wind shear 
rain bands 
eye wall 
eye
A

formation

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24
Q

wind moving in different directions

A

wind shear

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25
when is storm season in the Atlantic
June 1st- November 30th
26
produce rain during hurricane
rain bands
27
the fastest winds, surrounds eye
eye wall
28
2 types of cyclones
tropical depression | tropical storm
29
74-95 mph
category 1
30
96-110 mph
category 2
31
111-130 mph
category 3
32
131-155 mph
category 4
33
156 and up
category 5
34
how wide across can hurricanes be
1000 miles
35
where do the US hurricanes start
the west coast of Africa
36
why are there no hurricanes in California
water is too cold
37
``` thunderstorms off the coast of Africa tropical wave disturbance in the atmosphere intensify over warm water rising air condenses producing additional winds ```
hurricane origin
38
low pressure is pushed by south east trade winds move east to west can intensify or weaken depends upon surface water temp
hurricane path
39
main components of hurricane
eye wall | rain bands
40
fastest sustained winds
eye wall
41
flood of water on land caused by low pressure enhanced by high winds right side of hurricane produces highest amount
Storm surge
42
trees, buildings and cars can be damaged)
high winds
43
Storm surge rain the most damaging component of the hurricane wide spread
flooding
44
watches and warnings
evacuation
45
walls that prevent flooding
levees
46
cumulonimbus clouds must have lightning and thunder severe/ strong storms have hail, high wind speeds, tornadoes
thunderstorms
47
form when a cold air mass collides with a warm air mass cold front cold air causes the warm air to rise quickly forming cumulonimbus clouds can last for several hours
frontal storms
48
single storm and no fronts | air parcel rises because it is warmer than the surrounding air
air mass thunderstorms
49
water falling to earth | condensation nuclei "dust"
precipitation
50
super cooled water evaporates | deposited onto ice crystals
cold cloud/ ice process
51
discharge of electricity | balances out the large difference in charges that forms during a thunderstorm
lightning
52
cloud to cloud
most common
53
cloud to ground
common
54
ground to cloud
least common
55
what do weather maps show
``` temp dew point Sky/clouds wind speed and direction pressure current weather ```
56
strong low pressure system cold front and warm front strong thunderstorms wall cloud
tornado formation
57
area which has the right conditions to create tornadoes | located between cold front and warm front
larkos triangle
58
based on damage assessment correlates to wind speed EF0-EF5 EF6 is theoretically possible
enhanced Fujita scale
59
EF0
light
60
EF1
moderate
61
EF2
considerable
62
EF3
severe
63
EF4
devastating
64
EF5
incredible
65
what percent of tornadoes are weak
74%
66
what percent of deaths are caused by F4 and F5 tornadoes
67%
67
tornadoes that form on water
water spout
68
not a tornado | damage is not in a circular motion glide a tornado might be
microburst
69
conditions are right for a tornado people are warned that they are in the path of a storm larkos triangle start preparing to take shelter
tornado watch
70
a wall cloud has been spotted a tornado has been seek seek immediate shelter
tornado warning