Deseret evening news. [volume] (Great Salt Lake City [Utah]) 1867-1920, 1906-07-06
Il is a Small Land Cyclone That
Originates in Upper Layers
0 liz.
STORMS ALWAYS WHlRL.
RI. nesert WmrMind, Ocean Storm,
land Tornado and Local Storm, MI
Due 70 the same Cause.

yesterday, the teacher explained tha'
's. popular idea Of a storm, as Of
,thar natural facts obtained by OBJ
ovation. lacks dehuiteness. Obserya-
soo is the key the suggestion that
-.y lead 10 the scientific fact or truth
ns, lies back Of Il, Thus. we are ac-
..r6m,d to say that warm air rises.
sbn. science says that the cold air
.1k. and displaccs tho light air. Sci
,ro, shows that unless there Is a
st.afsr didercnco than l.6 degrees
tstween any layer Of air and the air
s00 feet above &C. the air Will not
s,oye further than 500 feet. since air
-1.is nc degrees IN rising 300 feet But
snv excess over that difference be-
tween layers 900 feet apart in vertical
distance furnishes the condition of
unstable equilibrium and brings about
uch a disturbance of the air that o.
/, called storm
STORMS ALREADY DESCRIBED
The desert whirl has broad base
ldue 10 the very hot surface air
sometimcs $50 dcgraes-not more
than five feet high but does not rise
'ar IN air because Of the restricted land
area that can present q perfectly fiat
surface 10 the suns rays ID may be
q tiny whirl OF dust, or q considerable
dust storm; but 10 usually occurs only
80 or near midday. and IN the after
noon It dies away Il is q dry storm.
The oceanic cyclone may cover an
immense AREAS fan as the sea lies
CLASSY still-but the surface tempcra-
lure seldom exceeds 80 degrees Yet
.his air. being saturated. contains po-
,ntially more heat than the desert
cir az l50. The warm sea air may
form a thick stratum of almost indie
fUIte height, because the Invisible
Npor Of water eyaporated from the
,eeau surface hy the suns rays is 1873
lines lighter than The air. and VIII
t.1use Itself 20 any height until it
reaches its dew point and condcnses,
which Il may not reach for hundreds
m feet; and n iu rising 300 feet IL
a0es not cool more than l.G degrees,
Doe air itself will rise as well as the
Npor But as soon as the yapQr con-
jenscs back into clouds or rain each
pound that does 50, gives of 1000
degrees of heat thereby sustaining the
warmth lost boy rising. These storms
ere thus self-feeders, and may last a
long time.
THE TORNADO
Imagine. now, that the heated strait
con Of air De- Ga some way displaced
Or a body by the cold air flowing un-
1a,ueath and lifting it When this
occurs il heated air that contains
nuch moisture, important differences
from cyclones aud desert whirls Will
follow. % The area cf disturbance
ViI be small. because no great body
~ air Is likely TO be- so lifted az A
whole. (2) there VIII be a free space
without the friction Of land or sea IN
vleh the cyclone motion may develop
gWmous speed. CD the shape Of the
Willing storm-mass viii Doe that of q
pD long and narrow funnel instead
% very wide and short one as IN
hs ,yclone. t4J the % rnado. beinE a
gcl0ne within The general influence
20 cylioniC forces-plrhaps "a cyclone
within ID cyclone. will turn lu the same
general dircction-to The right ln the
northern hemisphere Doves law,
sud V.ll sweep % Is parabolic curve
with Cos turning point iu that part
no the continent tIeNas, Kansas lll-
tC.E eic), 10 which The trade wind
movement has carried Co.
JUST WHAT HAPPENS.
i there is cold air above as well as
below the warm and moist stratum.
ta warm air. feeling about for a point
% escape through Us cold cover soon
hn1s or makes q vent whence 10 may
escape upwards. and the entire
warm mass "a mile or more iI dame
,.r ans often more than 1000 feet n
thickness, begins the rotary motion bee
fore explained Unlike the cyclone.
which may feed itself indefinitely The
tornado must cease as soon as the or-
ginal mass OF air escapes upward.
There being no land or water friction.
.ne Incoming currents may attain a
great velocity. Moreover. when a body
IS drawn toward the center about which
7, swings, rs velocity win increase as
much az its distance from the center
'ctcases Hence. in a tornado. ain
9th velocity Of 20 feet per second az
.he circumference may fly around az
iN ieei per second in the center But
such rapidly Increases the centrifugal
.'.cc 90 an amount proportionate 20 the
'llIfe OF the Increased velocity. and
..Ii Do forG.0 IH Ha
.e'.r ~ the whirling mass. into which
foJe ''''
DESCRIPTION OF ToRNADoEs.
tomatoes ore a form Of storms very
'.l.... o,. t.G,.l 1f-aal. ..II. Ial..t
ADVANCE They are whirls IN the all. a
IiI.. above the ground, into which the
ilildee winds are thrown With great
'.'.lIl. lncy are most numerous Boo
N4'saS Missouri, and Illinois. and
'l ur 80 an months and al nearly
10 h'l-s of the day. but more ftcQuert-
T. me afternoons 0f June and the adj
ilns months Their advance Is near
'''His % the northeast al about so
.'..' al hour The tornado is seen as
I'lN tunnel shaped mass hung over
'.N Clouds. ana emitting a roaring
'''4 as it comes near The Wh'fllnk
l'.ha is seen 20 swing from side 10
'.l,, ald 90 rise and fall. various OBJ.
.f slatched ft0m the ground may be
. Using ana tuning 81 rs cddies.
a'.ilns Pine trees appear like bushes
tll barn doors like shingles At GER
.a- height these are thrown out and
ai 20 tho ground. Iron chains. large
EeIns and heavy carts are carried
icy in these Whirls. People have
eiimcs been carried many feet. ana
'slonally dropped unhuri The eX-
'nadon given for sandWhirls m the
fails 20 explain tlc excessive
.r oi tornad1es. The explanation
..'.l above shows why the cyclone
.''s out one town. bounds over an
-'f IN its path without hauning 10.
demolishes a third .n the same