Viewed from above in the Northern Hemisphere, surface winds about about a subtropical high blow
clockwise and outward
Viewed from above in the Southern Hemisphere, surface winds about a subtropical high blow
counterclockwise and outward
Over a broad region about the center of a subtropical high, the horizontal air pressure graident is relatively---- and winds are ---------.
weak, light or calm
The tropical deserts of the world are found at latitudes near 30 degrees latitude because
of the sinking air associated with the subtropical highs.
Viewed from aboce in the Nothern Hemisphere, winds above the atmospheric boundary layer blow
clockwise and parallel to isobars.
A front is a narrow zone of transition between air masses that contrast in
temperature, humidity, or density.
In the Northern Hemisphere, with the shift from winter to summer, the semi-permanent subtropical highs shift
In the Northern Hemisphere, with the shift from summer to winter, the semi-permanent subtropical anticyclones shift
Which one of the following westerly wave patterns favors the maximum north-south exchange of air masses?
Across the United States, temperature contrasts are generally greatest during a --------------- circulation pattern in the westerlies.
In the Midwest, drough is most likely with a ------- circulation pattern in the westerlies.
A synoptic-scale cyclone is most likey to develop to on the ------- side of an upper-air trough.
In an essentially straight jet streak viewed from above, the strongest horizontal divergence takes place in the-------quadrant.
In the Northern Hemisphere, Ekman transport of surface ocean waters is about ------- of the surface wind direction.
90 degress to the left of
brings cold bottom water to the ocean surface, is the long-term average condition off the northwest coast of South America, is suppressed during El Nino, supports important fisheries.
An extreme and persistent El Nino
may be accompanied by weather extremes in various parts of the world.
During "neutral" condition, sea surface temperatures are highest in the ----- tropical Pacific.
In equal volumes, which one of the following air masses exerts the highest surface air pressure.
In summer, at the same pressure, maritime tropical air is-------continental tropical air.
less dense than
Of the following air masses, which one exhibits the greatest temperature changes between winter and summer
A front is a narrow zone of transition between between air masses that contrast in
temperature, vapor pressure, or density
As a warm front approaches, clouds appear in which one of the following sequences:
cirrus, alostratus, stratus
The cloud and precipitation shield associated with a cold front typicaly is------- the cloud and precipitaion shild associated with a warm front.
The type of front formed when the leading edge of cold air merges with a warm front is known as
an occluded front.
Surface air pressure drops when horizontal divergence aloft----------- horizontal convergence at the surface.
is greater than
In a mature extra tropical cyclone, fog, and drizzle are most likely to develop
in the cold air just ahead of the surface warm front.
If a weather station reports a wind shift from northeast to north and then northwest and a steady rain turning to snow flurries, the low center is most likey moving
from southwest to northeast, east of the station.
Precipitation tends to be steady and persistent in the --------sector of a mature extra tropical cyclone.
The coldest sector of a matue extra tropical cyclone is usually ------------ of the cyclone center.
The warmest sector of a mature extra tropical cyclone is usually ----------of the cyclone center.
The warmest air associated with a mature extra tropical cyclone is usually located
southeast of the low center.
What is the surface wind direction in the northwest sector of a mature extra tropical cyclone?
Major winter storms that most directly affect central Indiana follow the ------------- cyclone track.
Viewed from above, the surface wind circulation about an Alberta-type cyclone is
counterclockwise and inward
If the surface wind veers from east to southeast to south, Baltimore usually experiences
warm air advection.
A surface wind that backs the time indicates that you are situated on the ------side of the track of an extra tropical cyclone.
The relatively warm side of the track of an extra tropical cyclone
to the right of the system's forward motion.
Contrasting air masses are brought together to form fronts by the surface winds about the centers of ------------- pressure.
An intense extra-tropical cyclones tracks up the Mississippi River Valley and passes well to the west of Chicago. As the cold front sweeps through Chicago, the wind shifts from the south to the
When land and water are exposed to the same intensity of solar radiaiton, the land warms------ the water.
The time of year when a lake breeze is most likey to develop along the Lake Michigan shoreline is
The chinook wind blows done the leeward slopes of the mountain ranges and is characteristically
warm and dry.
are not warm at he moist adiabatic rate, do not flow downhill under the influence of gravity, does not occur only on the windward slopes of a mountain range.
As a chinook wind is drawn down the leeward slopes of a mountain range,
the saturation vapor pressure increases.
A dust devil
may resemble a small tornado, is not linked to a cloud, typically causes little or not property damage.