Question

part b
base your answers to questions 9 through 11 on the weather map, which shows a mid-latitude cyclone passing through new york state. the locations of fronts a and b, air masses x and y, as well as the city of saratoga springs, ny, are marked on the map.

1. how is the weather in saratoga springs likely to change over the next few hours?

(1) rain will end, followed by warm, dry weather.
(2) rain will end, followed by warm, moist weather.
(3) rain will end, followed by cool, dry weather.
(4) rain will end, followed by cool, moist weather.

1. air mass x is most likely

(1) cp.
(2) ct.
(3) mp.
(4) mt.

1. which diagram below best shows how front a should be drawn?

base your answers to questions 12 and 13 on the weather station model below.

1. what is the wind speed at this location?

(1) 15 knots
(2) 25 knots
(3) 15 miles per hour
(4) 25 miles per hour

1. what is the atmospheric pressure at this location?

(1) 21 millibars
(2) 82 millibars
(3) 1002.1 millibars
(4) 1021 millibars

base your answers to questions 14 through 16 on the diagram below that shows the prevailing wind regions of earth.

Explanation:

Question 9:

Saratoga Springs is near Front B (a cold front, as it's part of a mid-latitude cyclone moving east). After a cold front passes, rain ends, and cool, dry air (from a polar air mass) moves in.

Question 10:

Air mass X is a continental polar (cP) air mass: it originates over cold, dry land in northern Canada/US, matching the location west of New York State.

Question 11:

Front A is a warm front (curved, trailing the cold front in a mid-latitude cyclone). Warm fronts are drawn with semicircles pointing toward the direction the front is moving, on the side of the front's line facing the cooler air.

Question 12:

On a weather station model, each full feather represents 10 knots, each half feather 5 knots. The model has two full feathers + one half feather = 25 knots. Weather station models use knots for wind speed.

Question 13:

Atmospheric pressure on a station model: the number "021" represents the last three digits, with a leading 10 added (since pressure is near 1000 mb). So pressure is $1000 + 21 = 1021$ millibars.

Answer:

1. (3) Rain will end, followed by cool, dry weather.
2. (1) cP.
3. (2) [The diagram with semicircles along the curved front line]
4. (2) 25 knots
5. (4) 1021 millibars