The Bismarck tribune. [volume] (Bismarck, N.D.) 1916-current, 1925-04-27
NORTH DAKOTA
WINDS BRING
GOOD CROPS
Iipht and Strong BreeZes
Part Of Natural Resources
OF State
Extension Division,
nf North Dakota.

Weather Bureau.
First westerly wirds.
These blow from west to east IKE "A
uast stream several miles in Deepen
and hundreds Of miles in width, Ihey
are "A part Of the general ana Per.
mauent atmospheric circulation q
the planet AS they are allecte"
by the annual migration OF the sun
they blow more generally from the
southwest in summer ana the Ho' u"
vest in winter. They are oar most
common winds. w
Serond-Cyclonic winds. We have
piyen the term "cyclone" bad rcpn-
tation by using it Interchangeable?
with tornado" In reality ry
clone is a wind or winls blowing IN
toward a centre in a spiral way, the
wind swinging round from right to
left as the whole formation, - about
n thousand miles in diameter ;ld-
yances eastward. A cyclone taxes
its name from its slow rotary motion
and instead Of being destructive OF
life and property, the warm, moist
light air it brings with 1T, is highly
beneficial giving US practically all
Of our rain and snow.
Third .--Anti-cyclonic winds These
winds blow outward from the centre
in spiral way, the wind swinging
round from left to right as the Tor
nation advances eastward. Ihese
winds are responsible for our bright,
clear, sunny days which are prop.
tiously known as growing weather
Fonrth.-Warm wave or sirocco.
Sirocco is the Arabian word meaning
the rising of the sun and so is given
to this wind from the southeast 1t
is a warm moist wind that in sum
mer brings several hot sultry days
with hazy partly cloudcovered sky
followed b. a rain or cooling north
west wind, and in winter occasion
allv brings thaW. o.,
Fifth,-Cold wave and blizzard. A
cold, dry, northwest wind is respon-
sible for a cold wave which is mark
ed by clearing sky and sharp
drop of twenty degrees in twenty
four hours with minimum below
zero in winter and in spring and
autumn with minimum OF SIX de-
grees. If the wind is strong and
snow continues to fall after the
wind has gone to the northwest, a
blizzard is said to be in progress.
The cold wave refers to the sharp
drop in temperature only; the blz-
zard includes both the cold wind and
cattle on the open ranges but as
they occur only during the winter,
do no harm to vegetation.
Sixth, -Chinook or foehn. This is
a warm dry wind coming across the
mountains from the high plateaus
of the west. 1t makes its appearance
suddenly as rule, and the temper
ature rises rapidly. The snow dis
appears, due to the dryness OF the
air. The word "foehn" comes from
Switzerland where the wind was first
noted. In some valleys there the
foehn blows from 1880 days until
everything becomes so dry that all
fires are extinguished to prevent
great fires. In western North Da-
kota, however, the Chinook is well
coined because it clears the snow
from the cattle ranges and brings re-
Lief from the wintry weather.
breeze. On clear, warm, summer
DAYS this breeze comes up about
noon and always dies down with
the setting sun. 1t is particularly
prairie wind. During these sum-
mer days layers of air near the
ground become heated and expand
as they rise To take the place Of
this rising warm air. cooler air rush
es in from above, bringing with it
the higher wind velocity of the upper
atmosphere.
Eighth, -Thunderstorms. T hes e
storms occur everywhere and are
accompanied by variety of winds.
At first gentle breeze blows di-
rectly towards the storm. Then
from the blue-drab sauall cloud be-
meath the giant thunderhead, comes
violent outrushing squall wind,
known as the thunder squall, blow
ing directly from the storm. (Hail-
storms which sometimes accompany
thunderstorms are also formed in
this Whirling squall cloud and usual
lv begin to fall when the squall
strikes.)
Thunder rolls, lightning flashes,
and rain descends in torrents. After
"a time, the wind dies down but con-
tinues from the west or northwest.
An hour or two later both wind and
rain cease and the clouds hz.eak up
In little time the temperature
rises, and gentle breeze.-the pre-
vailing westerly,-comes out of the
west or southwest. Everything and
everyone is refreshed.
Ninth,-Tornadoes. The tornado
is the most violent of all storms and
occurs most frequently in the Mis-
sissippi Valley. It has a rotary mo-
ton like the cyclone. but instead
of thousand miles, it's diameter is
only about thousand feet, and the
speed with which the air moves to-
ward the centR is as swift as that
of a rifle bullet. Its most distinguish
ing feature is the pendant, funnel
shaped cloud which carries complete
destruction with it,
North Dakota is not as frequently
visited by tOrnadoes as states fur
Their south and east. During the
thirty-three years a. weather obser-
walton in this state, but few des-
tructive tornadoes, have been report
ed.
Tenth, - Whirirvinds. These are
probably miniature and harmb sss
form OF tornado and usually fol low
dry period. hen the surface lay.
er OF air is heated to a very high
temperature an the amount Of mois
ture in the air is SO small tn at thu
violent rise and expansion Of Thu
hot air brings on q small spira
whirling. A.s it sweeps over tn,
country. it catches up dust an,
leaves in a slender colurnu.
ElRvenths-outhw hot winds
Little can, be, said Of tlhes dry, hot
winds which, blow acfoss the uppe
Mississippi and Missou ri Valley
tnom the Southwest ,occag ionally dur
ing Sn eY cessive irouth of summer
4, As my be seen, North Dakota ha
her g4ot. winds and her. bad wind:
The good winds, it won Id seem, ar
those particularly typical of tn
pfairies, the bad ones, those share
by other states and countries.
The benefits derived from tn
. GREATER than the i'll effects suffere