WX301 exam 3 Questions and Answers
100% Pass
Globally, where are TS are most common? - ✔✔over tropical land masses
to get a TS what three conditions are needed? - ✔✔unstable air, a lifting mechanism and
low level moisture
over tropical oceans, most TS occur at what time? - ✔✔before dawn
An air mass thunderstorm has mostly updrafts and surface winds flowing toward the
storm until which stage? - ✔✔Cumulus
In Iowa, what time day are TS most common? - ✔✔around sunset
In the US which state has the most TS? In which season do they occur? - ✔✔Florida,
Summer
How long does an air mass thunderstorm usually last? - ✔✔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? - ✔✔Away from the TS
What is the exact translation for Cumulonimbus? - ✔✔Heaped rain-producing clouds
What is the best way to be alerted of a TS within 50 miles at night? - ✔✔Frequent
lightning
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, Over the desert southwest, what time of the day is a TS most common? - ✔✔Mid-
afternoon
What is the outer edge of an expanding cold air below a thunderstorm called? - ✔✔The
out-flow boundery
What kind of front is at the outer edge of the expanding cold air? - ✔✔Gust front
For a multi-cell TS with low-level flow from the south, where do new cells usually
form? - ✔✔South of the mature cell
What percentage of all TS do super-cell TS usually comprise? - ✔✔1&
Where in the US, what time of day, and in which months, is super-cell convection most
common? - ✔✔Over the great planes, in the late afternoon/evening, between April-June
What is a shelf cloud? Where does it form? - ✔✔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? - ✔✔More
vertical wind shear
What does a super cell TS have that a multi cell TS does not have? - ✔✔rotation
For a TS to form over the great plains, what are the winds at 5,000 AGL? - ✔✔190/45
Severe convection is most likely when the atmosphere is warm and ___ near the surface,
and cold and ___ aloft, with _____ vertical wind shear - ✔✔moist, dry, strong
In what sector are super-cell TS most common? Where are super-cell TS in relation to a
cold front? - ✔✔In the warm sector, East of a cold front
In which direction will a super-cell TS move if it is embedded in an average
tropospheric flow from 230 degrees? - ✔✔The east
COPYRIGHT © 2025 BY BRITTIE DONALD, ALL RIGHTS RESERVED 2
100% Pass
Globally, where are TS are most common? - ✔✔over tropical land masses
to get a TS what three conditions are needed? - ✔✔unstable air, a lifting mechanism and
low level moisture
over tropical oceans, most TS occur at what time? - ✔✔before dawn
An air mass thunderstorm has mostly updrafts and surface winds flowing toward the
storm until which stage? - ✔✔Cumulus
In Iowa, what time day are TS most common? - ✔✔around sunset
In the US which state has the most TS? In which season do they occur? - ✔✔Florida,
Summer
How long does an air mass thunderstorm usually last? - ✔✔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? - ✔✔Away from the TS
What is the exact translation for Cumulonimbus? - ✔✔Heaped rain-producing clouds
What is the best way to be alerted of a TS within 50 miles at night? - ✔✔Frequent
lightning
COPYRIGHT © 2025 BY BRITTIE DONALD, ALL RIGHTS RESERVED 1
, Over the desert southwest, what time of the day is a TS most common? - ✔✔Mid-
afternoon
What is the outer edge of an expanding cold air below a thunderstorm called? - ✔✔The
out-flow boundery
What kind of front is at the outer edge of the expanding cold air? - ✔✔Gust front
For a multi-cell TS with low-level flow from the south, where do new cells usually
form? - ✔✔South of the mature cell
What percentage of all TS do super-cell TS usually comprise? - ✔✔1&
Where in the US, what time of day, and in which months, is super-cell convection most
common? - ✔✔Over the great planes, in the late afternoon/evening, between April-June
What is a shelf cloud? Where does it form? - ✔✔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? - ✔✔More
vertical wind shear
What does a super cell TS have that a multi cell TS does not have? - ✔✔rotation
For a TS to form over the great plains, what are the winds at 5,000 AGL? - ✔✔190/45
Severe convection is most likely when the atmosphere is warm and ___ near the surface,
and cold and ___ aloft, with _____ vertical wind shear - ✔✔moist, dry, strong
In what sector are super-cell TS most common? Where are super-cell TS in relation to a
cold front? - ✔✔In the warm sector, East of a cold front
In which direction will a super-cell TS move if it is embedded in an average
tropospheric flow from 230 degrees? - ✔✔The east
COPYRIGHT © 2025 BY BRITTIE DONALD, ALL RIGHTS RESERVED 2
