WX301 Exam 3 UPDATED ACTUAL
Questions and CORRECT Answers
Globally, where are TS are most common? - CORRECT ANSWER✔✔- over tropical land
masses
to get a TS what three conditions are needed? - CORRECT ANSWER✔✔- unstable air, a
lifting mechanism and low level moisture
over tropical oceans, most TS occur at what time? - CORRECT ANSWER✔✔- before dawn
An air mass thunderstorm has mostly updrafts and surface winds flowing toward the storm
until which stage? - CORRECT ANSWER✔✔- Cumulus
In Iowa, what time day are TS most common? - CORRECT ANSWER✔✔- around sunset
In the US which state has the most TS? In which season do they occur? - CORRECT
ANSWER✔✔- Florida, Summer
How long does an air mass thunderstorm usually last? - CORRECT ANSWER✔✔- 30-60
minutes
Near a dissipating air mass thunderstorm with precipitation, is the horizontal surface air flow
near the TS flowing toward or away from the storm? - CORRECT ANSWER✔✔- Away
from the TS
What is the exact translation for Cumulonimbus? - CORRECT ANSWER✔✔- Heaped rain-
producing clouds
What is the best way to be alerted of a TS within 50 miles at night? - CORRECT
ANSWER✔✔- Frequent lightning
, Over the desert southwest, what time of the day is a TS most common? - CORRECT
ANSWER✔✔- Mid-afternoon
What is the outer edge of an expanding cold air below a thunderstorm called? - CORRECT
ANSWER✔✔- The out-flow boundery
What kind of front is at the outer edge of the expanding cold air? - CORRECT
ANSWER✔✔- Gust front
For a multi-cell TS with low-level flow from the south, where do new cells usually form? -
CORRECT ANSWER✔✔- South of the mature cell
What percentage of all TS do super-cell TS usually comprise? - CORRECT ANSWER✔✔-
1&
Where in the US, what time of day, and in which months, is super-cell convection most
common? - CORRECT ANSWER✔✔- Over the great planes, in the late afternoon/evening,
between April-June
What is a shelf cloud? Where does it form? - CORRECT ANSWER✔✔- A shelf cloud is a
cloud that forms above the gust front, in front of the updraft south of a multi-cell TS
What do multi cell and super cell TS have more of than an air mass TS? - CORRECT
ANSWER✔✔- More vertical wind shear
What does a super cell TS have that a multi cell TS does not have? - CORRECT
ANSWER✔✔- rotation
For a TS to form over the great plains, what are the winds at 5,000 AGL? - CORRECT
ANSWER✔✔- 190/45
Severe convection is most likely when the atmosphere is warm and ___ near the surface, and
cold and ___ aloft, with _____ vertical wind shear - CORRECT ANSWER✔✔- moist, dry,
strong
Questions and CORRECT Answers
Globally, where are TS are most common? - CORRECT ANSWER✔✔- over tropical land
masses
to get a TS what three conditions are needed? - CORRECT ANSWER✔✔- unstable air, a
lifting mechanism and low level moisture
over tropical oceans, most TS occur at what time? - CORRECT ANSWER✔✔- before dawn
An air mass thunderstorm has mostly updrafts and surface winds flowing toward the storm
until which stage? - CORRECT ANSWER✔✔- Cumulus
In Iowa, what time day are TS most common? - CORRECT ANSWER✔✔- around sunset
In the US which state has the most TS? In which season do they occur? - CORRECT
ANSWER✔✔- Florida, Summer
How long does an air mass thunderstorm usually last? - CORRECT ANSWER✔✔- 30-60
minutes
Near a dissipating air mass thunderstorm with precipitation, is the horizontal surface air flow
near the TS flowing toward or away from the storm? - CORRECT ANSWER✔✔- Away
from the TS
What is the exact translation for Cumulonimbus? - CORRECT ANSWER✔✔- Heaped rain-
producing clouds
What is the best way to be alerted of a TS within 50 miles at night? - CORRECT
ANSWER✔✔- Frequent lightning
, Over the desert southwest, what time of the day is a TS most common? - CORRECT
ANSWER✔✔- Mid-afternoon
What is the outer edge of an expanding cold air below a thunderstorm called? - CORRECT
ANSWER✔✔- The out-flow boundery
What kind of front is at the outer edge of the expanding cold air? - CORRECT
ANSWER✔✔- Gust front
For a multi-cell TS with low-level flow from the south, where do new cells usually form? -
CORRECT ANSWER✔✔- South of the mature cell
What percentage of all TS do super-cell TS usually comprise? - CORRECT ANSWER✔✔-
1&
Where in the US, what time of day, and in which months, is super-cell convection most
common? - CORRECT ANSWER✔✔- Over the great planes, in the late afternoon/evening,
between April-June
What is a shelf cloud? Where does it form? - CORRECT ANSWER✔✔- A shelf cloud is a
cloud that forms above the gust front, in front of the updraft south of a multi-cell TS
What do multi cell and super cell TS have more of than an air mass TS? - CORRECT
ANSWER✔✔- More vertical wind shear
What does a super cell TS have that a multi cell TS does not have? - CORRECT
ANSWER✔✔- rotation
For a TS to form over the great plains, what are the winds at 5,000 AGL? - CORRECT
ANSWER✔✔- 190/45
Severe convection is most likely when the atmosphere is warm and ___ near the surface, and
cold and ___ aloft, with _____ vertical wind shear - CORRECT ANSWER✔✔- moist, dry,
strong
