Thunderstorms Page: 9 of 17
iv, 12 p. : ill. ; 27 cm.View a full description of this pamphlet.
Extracted Text
The following text was automatically extracted from the image on this page using optical character recognition software:
ANSWERS: c. frontal slopes
a. Isolated thunderstorm clouds
FRAME 6
Thunderstorms do not manifest the same characteristics throughout their
existence. They develop through stages wiich are divided into:
1. cumulus stage
2. mature stage
3. dissipating or "anvil" stage
In the cumulus stage, air movement is in the form of
updrafts. Water droplets grow in size and raindrops
form.
In the mature stage, air movement occurs as updrafts
and downdrafts which increase in severity as this stage
j , develops. Freezing rain falls and is carried back
through the cloud forming hailstones. These increase
L t \ i in size as they are carried up and down the cloud in the
circulation pattern. Turbulence increases and resulting
winds are characterized by "shear" action. (Abrupt
)it J^ \ changes in direction due to existence of updrafts and
downdrafts.)
NVIL HEAD In the dissipating stage, air movement is in
f>,~ ^the form of downdrafts. The cloud loses its
moisture as rain and dissipates.
Hazards to aircraft in flight are associated
I < P J) with all stages of thunderstorm development,
but are most pronounced in the mature stage.
It is in this stage where "shear" action is
^"B^^^h7~ ~encountered, hailstones are present, and
turbulence is greatest. These factors can overstress an aircraft and cause
structural damage within a very short period of time.
The cumulus stage of thunderstorm development has:
(S updrafts
downdrafts
c. all of the above
Aircraft damage can occur in:
a. mature stage
b. dissipating stage
9 all stages4
Upcoming Pages
Here’s what’s next.
Search Inside
This pamphlet can be searched. Note: Results may vary based on the legibility of text within the document.
Tools / Downloads
Get a copy of this page or view the extracted text.
Citing and Sharing
Basic information for referencing this web page. We also provide extended guidance on usage rights, references, copying or embedding.
Reference the current page of this Pamphlet.
Turgeon; Sukalski; Burdick, R. L. & McKinney, S. A. Thunderstorms, pamphlet, January 1970; Texas. (https://texashistory.unt.edu/ark:/67531/metapth46569/m1/9/: accessed April 26, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting Boyce Ditto Public Library.