Ottumwa tri-weekly courier., 1908-08-18
MANY CHANGES
ARE PREDICTED
DISTURBANCES WILL CROSS THE
CENTRAL VALLEY II
TO 10. III
COOL WAVE IN NORTH
Following is the Weather Forecast up
Until the oath as Given by
w. T. Foster of Wash
ington.

A wave Of very low temperature is
scheduled to cross the continent,
starting today and lasting until the
18th, by weather forecaster w. T. Fos-
ter, of Washington, D. G. This wave
will be followed by warm wave
which will cross the central valley
about the 18th and will be followed
by another cool wave about the 22d.
Disturbances are predicted for the
10th to 21st. AS this storm will be in
the south, an unusually high tempera-
ture will prevail in the southern
states. Following is a complete fore
cast of the weather between the pres
ent time and the oath, as given by w.
7. Foster:
Washington, D. G., Aug. 15.-Last
bulletins gave forecasts of disturb
ance to cross continent by way of
northern states II to 15, warm wave
10 to IA, cool wave 13 to IL. Next dis
turbance will pass through the south
ern states and will reach Pacific
coast about II, cross Pacific slope by
close of IS, great central valleys 10
to 21,eastern states 20. Warm wave
W 49, SAooo l. oSiuS olopC dboul SlSGII
central valleys 10, eastern states 81.
about 20, great central valleys %, east.
ern states "a.
AS this storm will keep well to the
south, the warm wave will not have
much effect on the northern states,
consequently temperatures will aver
age unusually high in the southern
states for the week ending 23, and un-
usually low in the northern states
and Canada for the week ending 10.
Not much rain in the northern states
states during week ending 26 and not
not much rain in the southern states
15 to 26. The storm described above
is not expected to be of great force
nor will it be of any unusual interest
beyond the descriptions given above.
Immediately following Is, the storms
will be severe on Pacific slope and In
the countries lying east Of meridian
80. A wave Of very low temperatures
will cross continent Is to II.
The Red river of the north and the
Mississippi river, together with their
tributaries, constitute the central line
Of the great central valleys which
will divide into two parts by a line
along parallel 81 and will call them
north central and south central val
leys. They will extend westward to
the Rockies and eastward to the Allie
ghenies, except in Canada the north
central valleys will extend eastward
to Meridian 80. The Atlantic slope
will be divided into northern and
southern Atlantic states On the Pa
cific slope l will only forecast for
north Of San Francisco This will
make five divisions and my improved
system will enable me to make fore
casts for each division separately and
more in detail.
Long Rangers.
A contest between long range
weather forecasters Is on and I want
to emphatically assert that no sue
cessful method of long range forecast
ing will ever be found that is not
based on 40 or more years of daily
weather records.
The man who calls himself scientific
and refuses to recognize the daily
weather records, covering longer
period than is covered by the weather
bureau records, as the very best for
experimental and practical weather
work, is deluded and his efforts will
come to naught.
little thinking ought to convince
any really scientific mind that no
other method-sun spots. sun heat,
magnetism, either solar or terrestrial,
suns rotation. nor anything else away
from the locality for which forecasts
are to be made, can possibly be made
basis for long range weather fore
casts.
Last disturbances Of August will
reach Pacific coast about %. cross
Pacific slope by close OF "a, great cen
trail valleys 25 to 27, eastern states
%. Warm wave will cross Pacific
slope about %, great central valleys
rs, eastern states 81. Cool wave will
cross Pacific slope about 26, great cen
tral valleys %. eastern states 80.
This will be a large disturbance
and will affect north and south about
the same time. 1t will cause severe
storms. Particulars of it will be
given in next bulletin.