In the short-range weather forecasts of this chapter, we assumed that the pressure systems and fronts were ____.
a. moving at a constant rate
b. accelerating along a random curve
c. stable and unchanging
d. moving towards zero
e. exactly identical
Q. 2An ensemble forecast goes further and further into the future, the forecast lines can become scrambled. Such a chart is often referred to as a
a. spaghetti plot.
b. chaos chart.
c. multilinear plot.
d. filament chart.
e. shifting plot.
Q. 3
If you wanted to make a persistence forecast of minimum and maximum temperatures for a particular city, which type of chart would be most helpful?
a. surface chart
b. meteogram
c. 500 mb chart
d. adiabatic chart
e. Doppler radar display
Q. 4A comma cloud is
a. an organized band of clouds that looks like a comma on a satellite photograph.
b. a large cumulonimbus cloud whose anvil is in the shape of a comma.
c. a high wispy cirrus cloud that takes on the shape of a comma.
d. the spiraling arms of a hurricane.
e. a band of high cirrus clouds blown by the jet stream.
Q. 5Which below is least likely to be a condition associated with an omega high?
a. It is in the shape of the Greek letter omega.
b. It is known as a blocking high.
c. It forms when the flow aloft is zonal.
d. It tends to persist in the same geographic area for many days.
e. It keeps troughs in their positions.
Q. 6Lines connecting points of equal pressure change are called
a. isobars.
b. isograds.
c. contours.
d. isotherms.
e. isallobars.
Q. 7Very short-range forecasts often utilize which of the following forecast methods?
a. steady-state or trend method
b. pattern recognition method
c. ensemble method
d. both the steady-state (trend method) and ensemble methods
e. both the steady-state (trend method) and pattern recognition methods
Q. 8Modern computer forecasting models have increasingly smaller grid spacing. This presents which of the following problems?
a. Mesoscale weather features can be predicted.
b. Small-scale weather features can be resolved by the models.
c. Many more computations are needed.
d. The vast amount of information makes it difficult to make a prediction.
e. It takes too long to make a prediction.
Q. 9Suppose there are two cloud layers above you. The lower cloud layer is moving from a westerly direction, while the higher cloud layer is moving from a northwesterly direction. From this observation you conclude that the wind is ____ with height and ____ advection is occurring between the cloud layers.
a. backing; cold
b. backing; warm
c. veering; cold
d. veering; warm
e. backing; no
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