How do you report prevailing visibility at US stations and overseas...
The driving mechanism that is mainly responsible for the earth's...
The distinguishing feature of any tornadic activity is
What air mass forms over land only during the summer?
In regards to types of pressure systems, a heat low is a
If you throw a ball towards a stationary target from the window of a...
Where are the greatest velocities located in relation to the...
A thunderstorm officially ends
"Jet fingers"
Above 13 miles, the radiation from the sun breaks down the oxygen in...
An increase of mass in a column of air will cause the surface pressure...
A low-pressure system undergoing cyclogenesis is said to be
When the central pressure of an anticyclone is rising, you can infer...
Unstable waves are classified as
What air mass classification signifies a stable, continental polar air...
For observing purposes, five hydrometers are considered to be...
It is winter. A cPk air mass is moving over the Great Lakes. In this...
What causes the surface low to deepen during the self-development...
Which force is described as any center-seeking force?
To properly report the visibility for more than one sector, you would...
For a runway visual range (RVR) report of R22/1000V1600FT, what is the...
What type of precipitation might you observe with clear skies?
The primary cause of surface pressure changes for a dynamic low is net
How many degrees centigrade does the temperature decrease per 1,000...
What air mass classification signifies an unstable, maritime tropical...
Which orographic cloud resembles an almond or a fish?
A change in wind direction of 45° (or more) that takes place in...
What causes a surface high to build during the self-development...
Coriolis force (CoF) is created by
The damper effect is comprised of upper-level
Advection transfers temperature
What factors must a region possess in order to facilitate air mass...
Which process is most responsible for the slow formation of air masses...
Which low cloud type and classification is identified by the presence...
The best way to distinguish stratocumulus from altocumulus clouds is...
"Clouds or obscuring phenomena that have bases at the same...
Wind observing equipment is oriented to
The two atmospheric gases most responsible for the absorption of...
In the life cycle of a low, the system will evolve into a cold...
After warm air with an unstable wave is pushed aloft and cuts off from...
The stratosphere is characterized by
Which force is the "equal and opposite reaction" to the center-seeking...
The areas of low pressure that correspond to the belt of low pressure...
An unstable wave cyclone is one where the amplitude
In a cold occlusion, the coldest air is found
What is the reference level for all pressure values?
What color balloon would you use to determine the ceiling heights of...
Continental tropical air masses are usually associated with
Horizontal divergence within an air mass will
As air converges at the surface and toward the center of a layer,...
Which statement best describes water vapor in the atmosphere?
How many stages are there in the life cycle of a low?
The width of the jet stream core is approximately equal to the
Using average surface frontal slopes, how far ahead of the surface...
As an air mass is heated from below, there will be increased
Anticyclogenesis typically occurs at, and just downstream from,...
With the passage of a cold front in the Northern Hemisphere, the...
The force that is responsible for starting the horizontal movement of...
A high-pressure system undergoes anticyclolysis when the clockwise...
In relation to the jet core, the greatest vertical wind shear is...
Centrifugal force (CeF) will increase when there is a decrease in
When an inactive front passes your station, the dew points will
A warm barotropic high is a type of pressure system that
In the chimney effect, the maximum upward vertical wind motion will be...
The simplest method for locating the 500 millibar frontal zone is to
The frontolytic processes are most effective
A thunderstorm is present and occurring at your station. In addition,...
Which high cloud classification is also referred to as a mackerel sky?
Which heat transfer process involves the transfer of energy by...
When frozen precipitation is expected, you would
In relation to the jet core, the greatest horizontal wind shear is...
The rate that an air mass modifies depends on the
A low dissipates after proceeding through its entire life cycle which...
Air mass stability characteristics often depend on the temperature...
How would you classify a stable air mass that formed over land in the...
What pressure value is the basis for determining all other pressure...
In comparison to an active cold front, an inactive cold front is...
Frontogenesis requires two adjacent air masses with
The temperature to which a given parcel of air must be cooled, with...
Surface pressure changes are largely controlled by
The cold conveyor belt originates in the low levels that are located
Cirrus clouds in the form of an anvil are classified as
Which high cloud can occasionally be so transparent that the only...
You are preparing to use a convective cloud height table to determine...
Which is primarily responsible for low-level divergence acting as a...
The difference in cloud classification between L1 and L7 is
Blowing spray is reported only at sea stations near large bodies of...
Converging contours downstream of the jet stream will cause the jet to
The balance of forces needed for gradient cyclonic circulation is...
In a cold occlusion, which type of front, if any, is found aloft?
When only high and middle clouds are associated with a warm front, the
The temperature an air parcel would have if it were cooled...
The average slope of a cold front is
Which air mass involves most of the wintertime storms for the North...
In the baroclinic instability process,
When using Petterssen's rule, the factors needed for cyclogenesis are...
The weather characteristics of a particular month in a given locality...
You would classify precipitation as intermittent if it
A corona is often present at night with
A warm frontal occlusion occurs when the cool air