Station Model Lab Answer Key PDF Details

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Form NameStation Model Lab Answer Key
Form Length6 pages
Fillable?No
Fillable fields0
Avg. time to fill out1 min 30 sec
Other namesweather station model lab answer key, station models lab answer key, station model answer key, station model lab answer key

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Name ___________________________

Station Model Lab

Period _____ Date _________________

 

At commercial airports throughout the country the weather is observed, measured and recorded. In New York State alone there are over a dozen observation sites. These stations record: temperature, dew point, cloud cover, visibility, height of cloud base, amount of precipitation, wind speed and wind direction to name a few. The measurements made every hour at every station around the world. This is a very large amount of data, which can be very useful in predicting the weather.

The challenge is that a large amount of data needs to be communicated

to every weather station in the US. Because of the lack of space on weather maps, the weather information needs to be coded. In order to do this the information needs to be highly organized and standard throughout country. By using station models the data can be represented by a symbol or number, and it’s meaning is easily understood by where the symbol or number is placed on the station model.

Through this lab you will learn to understand station models used in meteorology by coding and decoding a variety of stations.

WEATHER MAP INFORMATION

STATION MODEL

Temperature (°F)

Amount of cloud cover

Barometric

(approximately 3/4 covered)

Pressure (1011.2 mb)

 

Precipitation

Type31 112

Visibility (mi)

½ **

+12

 

 

 

26 .25

Dew Point (°F)

Wind Direction

From the Southwest

Wind speed

Whole feather =10 knots

Half feather = 5 knots

Total

= 15 knots

Barometer Trend (a increasing 1.2 mb rise in the past 3 hours)

Precipitation

(inches in the past 6hrs)

Station Model Lab

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©HGB 3/27/2000

Procedures

Air Pressure: when coding air pressure on a station model, use the following rule:

a.if the air pressure on the station model is 500 or more, place a 9 in front of this number. Also put a decimal point in front of the last number EX: 588-- 958.8 millibars

b.if the air pressure number on the station model is less than 500 add a 10 in front of the number. Also put a decimal point in front of the last number EX: 091=1009.1 millibars

Past Pressure: When calculating the air pressure for three hours previous use the following rule:

a.if the station model displays a + some number there was an increase in the barometric pressure. Place a decimal between the 2 digits and subtract the number from the current air pressure to get the pressure from 3 hours ago. EX +12= 1.2 mb increase so the past pressure is lower by 1.2 mb.

b.if the station model displays a - some number the was an decrease in the barometric pressure. Place a decimal between the 2 digits and add the number to the current air

pressure to get the pressure from 3 hours ago. EX -24= 2.4 mb decrease so the past pressure is higher by 1.2 mb.

c.

Temperature and Dew point: Are always reported in degrees Fahrenheit (°F) these may need to be converted to degrees Celsius (°C) using the ESRT

Wind direction is measured by where the wind originates. The stick of the station models points in the direction of where the wind comes from. The flags on the stick approximate the speed of the wind, a short flag: 5 knots, a long flag 10 knots and triangle is 50 knots. A knot equals 1.85km/hr or 1.2 mph

Cloud cover is determined by how much of the visible sky is filled with clouds. It is usually done in estimates of 10th’s. AN obstructed view is when the observer, for some reason, could not see the sky… like at night.

Cloud Cover Symbols

Clear

1/10

1/4

4/10

1/2

6/10

3/4

9/10

Overcast

Obstructed

Sky

Cover

Cover

Cover

Cover

Cover

Cover

Cover

Sky

View

Precipitation may fall to the earth in many different forms. The form is indicated by a symbol shown below. The water equivalent (the water or melted form of the precipitation) for the last three hours is reported in the station model using inches.

Precipitation Symbols:

 

,

 

 

 

 

 

*

 

 

 

Rain Showers

Hail

Snow

Drizzle

Sleet

Fog

Thunderstorm

Station Model Lab

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©HGB 3/27/2000

Part 1

Using the station models below, decode the weather conditions and record the information displayed in the following table:

Station 1

65

=

64

 

Station 2

998

84

-30

 

 

 

 

 

 

 

 

 

0.2

60

011

+01

Station 3

40 001

,+10

38 1.5

Station 5

28

*

25

Station 4

70

65

012 -22

982

-93 0.3

Weather Element Station 1 Station 2 Station 3 Station 4 Station 5

Temperature (°C)

Temperature (°F)

Barometric

Pressure (mb)

Precipitation

Type

Percent of Sky

covered by

clouds

Wind Direction

Wind Speed

(Knots)

The pressure three

Hours ago? (nb)

Station Model Lab

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©HGB 3/27/2000

Part 2:

In the chart below, you find meteorological data that was taken at several different New York State airports. Use this data to create station models for each city listed in the table.

City

Temp

Dew

Wind

 

Air Press.

Sky

Present

°F

point

Direction

 

Speed

Weather

 

 

 

 

 

 

 

 

 

 

 

 

 

Rochester

69

58

SW

 

16

1016.9

50%

none

 

 

 

 

 

 

 

 

 

Buffalo

60

45

NE

 

5

1030.1

10%

none

 

 

 

 

 

 

 

 

 

Syracuse

70

69

SW

 

20

998.2

25%

drizzle

 

 

 

 

 

 

 

 

 

New York

72

72

W

 

30

986.4

100%

thunder

 

Storm

 

 

 

 

 

 

 

 

Binghamton

71

69

NW

 

35

999.1

90%

sleet

 

 

 

 

 

 

 

 

 

Albany

32

32

S

 

10

1000.0

overcast

snow

 

 

 

 

 

 

 

 

 

RochesterBuffalo

Syracuse

New York

BinghamtonAlbany

Station Model Lab

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©HGB 3/27/2000

Conclusion:

Study the weather stations shown to the right Write the letter (or letters) of the weather station(s) next to each description of weather conditions.

a.

Wind NW at 40 miles per hour :

_________________

b.

Wind SE at 15 miles per hour :

_________________

c.

Overcast :

_________________

d.

Clear sky :

_________________

e.

Thunderstorm:

_________________

f.

Closest to the warm front :

_________________

g.

Closest to the cold front :

_________________

Shade the area of the mT air mass in the diagram below:

X

Station Model Lab

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©HGB 3/27/2000

Matching Questions

On the blank line, write the letter of the item in Column B that is most closely related to the item in column A.

Column A

Column B

 

______1. Large sections of troposphere with

 

a. warm front

same temperature and humidity

 

b. winter storm

______2. Boundary between two air masses not

 

c. occluded front

moving in relation to each other.

 

d. hurricane

______3. Warm air mass overtakes cold air mass

 

e. stationary front

______4.

Cold air mass overtakes warm air mass

 

f. cold front

______5.

Brief local storm with thunder and lightning

 

g. air mass

______6.

Severe, narrow storm with fast, swirling winds

h. tornado

______7.

Large, tropical cyclone with heavy rains and winds

i. thunderstorm

______8. severe storm with precipitation of snow and ice

Station Model Lab

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©HGB 3/27/2000

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