The Opelousas courier., 1895-12-21

ihe Tracks Of Most Of fheM Lead to thu
St. Lnwreice River.

the Tracks of Most Of Them Lead to tho
st. Lawrence River.
One of the chief interests, ASIDE
from the values they have in respect
Is f~breshstfhe, fl the study Of charts
If storm tracks, CONSISTS In comparing
them month with month. in order 1o
observe the changes that take place
vii, fHs PROGRESS OF, the seasons. IL
was shown oil tbs Atspss map that
the summer storms, In the majJfity OF
cases, originate in three places: in Al
berta, Colorado, and the West Indies.
On the other hand, III September the
chart indicates that they arise IN al
least sig places. We have n set OF
storms generating in Alberta, at which
thift+-eig1t were observed In ten years;
there wefa ElkSsi Eotsd that entered
the North Pacific coast ct the United
s.ates; next five were observed to com
mence their astsrity oh the northern
plateau of the Rocky tacnntain dis
triet, also sever developed over the
Isolated plates. OF Colorado; five ap.
peared on the west coas: IF the guilt o.
Mexico; finally seven tropical ilt'rri-
canes came in from the West Indies.
These all pursued their paths to the
guif tt st. liza wtenee. in the neighbor-
hood of which they 1gft tbs Aeld OF OBJ
seryation. The Alberta storttis Fin
along the northern boundary Of the
United States ii. SIS northwest, cross
the lake region, and advance the
st. Lawrence valley, reaching the gulf
in about three days. 1t will be OBJ
served t!.At thee@ tracks have a strong
tendency TO loop down ne;aa' the l..eein-
ming Of their paths over the ROCKY
mountain slope into North and South
Dakota, whence they the main
track i'll the heighborhood Of Lake
Superior: The North Pacific storms,
those ifoH W.5mibg and Idaho, as
well as the Colorado staEnisi III twen-
ty-fouIr hours find themselves oil the
main track in The lake region. whence
they go to the gulf OF St. Lawrence.
These four groups belong very cied-ls
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-fvs. %lhitiutes, except where 1t 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 gem
Grafton, because the air of this belf
must flow off on both sides, south as
we'll 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.
ience over the Atlantic states; also, we
have the West Indian storms, which
are developed further east, in the calm
awhile in the westerly tropical cur.
rent. recurve Oh the western edge OF
the great Atlantic anti-cycione, mug.
cling the periphery OF the same, and
also skirt the Atlantic coast, unless by
the obstruction 81 a high baromete,
they enter the gulf states before they
recurve. The krratic movements Of
the west gulf and the east gulf storms
consist in their effort to break through
the high-pr1ssure belt. 1t is during
this passageAwhen they are most Wig
orersly fed, Ssest they attain the de-
strultive violence so often noted in
the 1outhern states. Washington Sta..