The National tribune., 1889-11-14
THE WEATHER.
Notable Occurrences for the Week Ending Eov. 0
1881.

1889.
by LIEUT.. J. p. FINLEY, U. 9. SIGNAL SERVICE.
correspondence invited, suggestions desired,
and information cheerfuly furnished. Every Of
fort employed to make this Bureau OF practical use
TO the readers of THE NATIONAL TRIBUNE. All
communications should be addressed-W Weather,
THE NATIONAL TRIBUNE Office. Washington. ID. O. !
Lows, OR AREAS OF WARM. MOIST AIR, CLOUDY
WEATHER, WITH GENERAL RAIN OR SNOW
AND HIGH WINDS.
Five such areas affected the weather Of the
United States One continued from last week,
one came from Southern California and three
from the Northwest Territory. Average pro-
gressive velocity eastward 20 miles per hour.
Average duration four days.
HIGHS, OR AREAS OF COLD, DRY AIR AND GEN.
ERALLY CLEAR WEATHER, WITH MODERATE
WINDS.
Five such areas affected the weather of the
United States One continued from last week,
one came from the California Coast and three
came from the North Pacific Coast. Aver
age progressive velocity eastward % miles per
hour. Average duration about four days.
1emperdture.-The maximum fall in "a hours
(34o) occurred at Chicago, ILL.,. on the 4th.
The maximum rise (24o) occurred at Pueblo,
Colo, on the 3D.; Fort Custer. Mont, and Bis
marck and Fort Sully, OAK, on the 9th, and at
Denver. Colo, on the 18th. The maximum
1897 occurred at Key West and Point Jupiter,
Fla, on the Goth. The minimum (6o below
zero) occurred at Cheyenne, Wyo., on the 5th.
Precipitation Rain or snow has boon report
cd from evory State and Territory except
Idaho, California and Nevada. The heaviest
lover one inch in "a hours) was reported from
Florida, Texas Louisiana, Missouri, Ohio and
Tennessee. The maximum amount in "a
hours (2.52 inches) occurred ut Shreveport, La,
on the 9th and 7th.
Ripers-The maximum rise al inches) oc-
- ID. A. W.
maximum fall (22 inches) occurred at Pitts
burg, Pa, on the 9TH.
Existing Conditions.-The principal low Is CEN
trail in eastern New England, but Of slight
energy. Another Low il joining 1t from tho
Upper Lake region. The principal high is cen-
trial In the Mississippi Valley. Another 10 APP
preaching from British Columbia. Occasional
light rain or snow in the Middle Atlantic
States. Lower Lake region and New England.
Elsewhere generally fair weather.
Facts 10 be Remembered.--In the evenings of
Autumn and Spring condensed vapor arising
from river 10 regarded az q sure indication OF
coming frost. This condition Of atmospheric
change develops from the fact that the air Ia
colder than the water, and therefore the evapo-
ration from the surface Of the latter Is almost
Immediately condensed, aud appears as low
clouds or fogs. This cold air must come from q
high near st hand, and therefore there is the
prospect Of clear, still weather, which, being
conducive to radiation, gives rise to the condi-
tons which produce frost. When fires burn
faster than usual, and with blue f1ame, frosty
weather may BIO expected. This condition Is
caused by the reduced temperature of the outer
air making better draft in the chimney. In
Winter, when the sound Of the breakers on
shore is unusually distinct, frost is indicated.
These last two prognostcs are explained by the
fact that the atmosphere within q high or anti
cyclone Ii very dense and Quot. The places
where fog does not form the sky will often DO
clear at night, whence the saying
Clear moon,
Frost soon.
In Winter, when the moons horns are sharp
and we'll defined, frost Is expected.
The wind In an anticyclone or high system
blows In the direction OF motion, but slightly
outward, and as the anticyclono or high is
nearly always OF slow movement tho wind
blows from the same quarter for several days
together. When the wind turns from north
east TO east, and continues two days without
rain, and docs not turn south the third day nor
rain the third day, 10 Ia likely to continue
northeast for eight or nine days oil fair, and
then como 10 the south again. Hence tho say
ing
III the wind IL northeast three days without rain,
Eight days win pass before south wind again.
Within the area of high the wind is usually
very light in force and ID Ia said TO be Fign OF
continued good weather whom the wind so
changes during the day as TO follow tho sun.
This veoFinE with the SUM-" rs IL 10 called, ID
the ordinary diuFnal variation Of the wind,
which In this country Is very obvious with the
shallow gradients Of an anticyelone or hiOA