If the path of a cyclone indicates
1-41.
1-42.
1-43.
1-44.
its future movement will run into a
stationary anticyclone over the
eastern Pacific Ocean, which of the
following conditions may occur?
1.
Its speed will increase, and
its path will curve northward
paralleling the isobars of the
high
2.
Its speed will decrease, and it
will become quasi-stationary
and probably dissipate
3.
Its speed will decrease, and
its path will curve northward,
paralleling the isobars of the
high
4.
Its speed will decrease, and
its path will be perpendicular
to the isobars of the high
Anticyclone centers tend to move
toward which of the following
areas?
1.
Toward the area of greatest
pressure rises
2.
Toward the area of greatest
pressure falls
3.
Toward the area of maximum
low-level convergence
4.
Toward the warm sector isobars
Warm unoccluded lows move in the
general direction of the current in
the warm air.
What general
statement is valid regarding their
paths and speed?
1.
They usually have straight
paths, and their speed is
approximately the same as that
of the cold front
2.
They usually have straight
paths, and their speed is
somewhat faster than that of
the warm air
3.
They usually have straight
paths, and their speed is about
the same as that of the warm
air
4.
They usually have straight
paths, and their speed is
somewhat slower than that of
the warm air
Which pressure systems should be
considered first when the steering
method is used?
1.
Warm highs and cold lows
2.
Warm highs and warm lows
3.
Cold highs and warm lows
4.
Cold highs and cold lows
1-45.
Assume you are using the steering
method to forecast the movement of
surface systems in relation to the
upper level flow.
Where possible,
what upper level(s) should you use?
1.
Use the 700-hPa level only
2.
Use the 500-hPa level only
3.
Integrate the results of the
500- and 300-hPa levels
4.
Integrate the results of the
movement and speed from the
700- and 500-hPa levels
1-46.
Assume you are forecasting the
movement and speed of a surface
low.
The upper level winds for the
700-hPa stratum are northwesterly
at 20 knots.
YOU should forecast
this low to move in what manner?
1.
In an unknown direction, at a
speed of 14 knots
2.
In an unknown direction, at a
speed of 20 knots
3.
Southeastward at 20 knots
4.
Southeastward at 14 knots
1-47.
When the 500-hPa chart is used for
steering a surface system, the
orientation of the contours
determines the direction of motion.
What factor should be used to
compute the speed?
1.
50% of the forecast upstream
winds for the 24-hr period
2.
50% of the forecast downstream
winds for the 24-hr speed
3.
70% of the forecast downstream
winds for the 24-hr speed
4.
70% of the forecast upstream
winds for the 24-hr speed
1-48.
Warm, unoccluded lows tend to move
in what direction in relation to
the steering current aloft?
1.
Slightly to the left of it
2.
Slightly to the right of it
3.
At right angles to it
4.
Parallel to it
1-49.
Assume that in an unoccluded low
the thickness gradient and the mean
wind flow are both strong.
In what
direction should you expect the low
to move?
1.
Closer to the direction of the
mean wind flow than the thermal
wind
2.
Closer to the direction of the
thermal wind than the mean flow
3. Midway between the direction of
the mean flow and the direction
of the thickness contours
6