Audubon Republican. [volume] (Audubon, Iowa) 1894-1925, 1895-10-31
AMERICAN STORMS.
Tho Tracks of Most of Them Lead to the
st. Lawrence River.

st. Lawrence River.
One Of the chief interests, aside
from the values they have in respect
to forecasting. in the study of charts
of storm tracks, consists in comparing
them month with month, in order to
observe the changes that take place
with the progress of the seasons. 1t
was shown on the August map that
the summer storms, In the majority of
cases, originate in three places: in All
berta, Colorado. and the West Indies
On the other hand, in September the
chart indicates that they arise in at
least six places. We have one set of
storms generating in Alberta, at which
thirty-eight were observed in ten years;
there were eleven noted that entered
States; next five were observed to COM
mence their activity on the northern
plateau of the Rocky mountain dis
trict; also seven developed over the
isolated plateau Of Colorado; five APP
peared on the west coast of the gulf of
Mexico; finally seven tropical hurri-
canes came in from the West Indies.
These all pursued their paths to the
gulf of st. Lawrence, in the neighbor-
hood of which they left the field of OBJ
servation. The Alberta storms run
along the northern boundary Of the
United States in the northwest, cross
the lake region, and advance down the
St Lawrence valley, reaching the gulf
in about three days. 1t will be OBJ
served that these tracks have a strong
tendency to loop down near the Begin
ming of their paths over the Rocky
mountain slope into North and South
Dakota, whence they recover the main
track in the neighborhood of Lake
Superior. The North Pacific storms
those from Wyoming and Idaho, as
well as the Colorado storms, in TWEEN
ty-four hours find themselves on the
main track in the lake region, whence
they go to the gulf of St. Lawrence.
These four groups belong very clearly
to one family, and have their rise on
the northward side of the great high
pressure belt that extends around the
globe in about latitude thirty degrees,
thirty-flve minutes, except where it is
DETECTED by the continents. In the
United States this belt leaves the
Atlantic coast near South Carolina,
but it enters this country in northern
California or Oregon, nearly ten de-
grees further north. The detection
thus observed is no doubt largely due
to the elevations of the Rocky noun
tain districts.
On the southern side of the high belt
we find another system of storm gen.
GRAFTON, because the air of this belt
must flow off on both sides, south rs
well as north, though the quantity re-
turned to the southwark is less than
that to the northward. Thus, we find
the five gulf of Mexico storms, which
usually advance to the gulf of st. Law
renee over the Atlantic states; also, we
have the West Indian storms, which
are developed further east, in the calm
zone of the Doldrums, move westward
awhile in the westerly tropical cur
rent, recurve on the western edge OF
the great Atlantic anti-cyclone, hug
ging the periphery of the same, and
also skirt the Atlantic coast, unless by
the obstruction of high barometer
they enter the gulf states before they
recurve. The erratic movements of
the west gulf and the east gulf storms
consist in their effort to break through
the high-pressure belt. 1t is during
this passage, when they are most Wig
~orously fed, that they attain the de-
structive violence so often noted in
the southern states. -WashingtonS Star.