The Law of Storms: The various phenomena by which their approach can be ascertained with certainty, and practical directions to mariners for the avoidance of their fury, compiled from various sourcesRoss, John
Science
The Law of Storms: The various phenomena by which their approach can be ascertained with certainty, and practical directions to mariners for the avoidance of their fury, compiled from various sources
Ross, John
Storms
The relations of the winds to the margin in the Southern Hemisphere,
will be exactly the reverse of their relation in the Northern. Thus: It
is the southern margin of the storm south of the Equator, that exhibits
an easterly; the western margin a southerly; the northern margin a
westerly, and the eastern margin a northerly wind. Hence, each portion
of the hurricane having its appropriate wind, there results, according
to the law of the rotation of revolving gales, a very simple rule for
determining the bearing of the center of the storm from the ship, viz:
Look to the wind’s eye and set its bearing by compass, the _eighth_
point to the right thereof when in the Northern Hemisphere; but to the
left of the wind’s direction when in the Southern Hemisphere, will be
the bearing of the storm’s center. Thus, in the Northern Hemisphere,
from an easterly wind, which characterizes the northern margin of the
storm, its center will bear south; from a northerly wind the center
will bear east; from a westerly wind it will bear north, and from a
southerly wind, west. But in the Southern Hemisphere, from an easterly
wind, the center of the storm bears north; from a southerly wind the
center bears east; from a westerly wind, south; and from a northerly
wind, west.
The above rule is perfectly clear and definite; but as it is especially
important to avoid the center of the storm,—its most dangerous
part,—the following table shows at a glance its relative bearing in
each Hemisphere.
═════════════════════════════════╦══════════════════════════════════
IN THE NORTHERN HEMISPHERE. ║ IN THE SOUTHERN HEMISPHERE.
─────────────┬───────────────────╫─────────────┬────────────────────
If the wind │ The center of the ║ If the wind │ The center of the
be— │ storm will bear ║ be— │ storm will bear
│ from the ship— ║ │ from the ship—
─────────────┼───────────────────╫─────────────┼────────────────────
North. │ East. ║ North. │ West.
N by E │ E by S ║ N by E │ W by N
NNE │ ESE ║ NNE │ WNW
NE by N │ SE by E ║ NE by N │ NW by W
NE │ SE ║ NE │ NW
NE by E │ SE by S ║ NE by E │ NW by N
ENE │ SSE ║ ENE │ NNW
E by N │ S by E ║ E by N │ N by W
East. │ South. ║ East. │ North.
E by S │ S by W ║ E by S │ N by E
ESE │ SSW ║ ESE │ NNE
SE by E │ SW by S ║ SE by E │ NE by N
SE │ SW ║ SE │ NE
SE by S │ SW by W ║ SE by S │ NE by E
SSE │ WSW ║ SSE │ ENE
S by E │ W by S ║ S by E │ E by N
South. │ West. ║ South. │ East.
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