Ottumwa tri-weekly courier. [volume] (Ottumwa, Iowa) 1903-1916, 1907-09-03
WITH ADVENT OF AUTUMN COOL
Err WEATHER WILL PREDoMlN-
ATE IMMEDIATELY
+ ROSTs AND STORM
Crops May be in Danger After Sep
TENDER 4-Foster Has Force OF
Clerks Compiling .crop-W
Calculations for Next Year.

AS if to exercise to the fullest ex-
tent her powers while her season
reigns, Madame Summer has held the
mercury little short of record marks
during the last few days. But with
the fret day of autumn September l,
a noticeable drop will begin and cool
er weather will bring comfort and re-
lief. This cool wave will reach its
lowest mark about September 4. Ac
Icompanying it are possible frosts and
rains. Fosters complete prediction
for the coming week is as follows:
Washington, D. G., Aug. 31.-Last
bulletin gave forecasts OF disturb
ances to cross continent 80 to Sept
8, warm wave 20 to Sept. 2. cool wave
Sept to s. Next disturbance will
reach Pacific coast about Sept 4,
cross west of Rockies country by close
of 5, great central valleys to s, east.
ern states 9. Warm wave will cross
west of Rockies about 4, great central
valleys 6, eastern states 8. Cool wave
will cross west of Rockies about Z,
great central valleys 8, eastern states
| IL.
This disturbance will follow great
fall in temperatures and will bring a
moderate warm wave, but On most
parts of the continent temperatures
will average below normal and fire.
quent showers may be expected as
this disturbance passes eastward.
Drouth in Texas.
The center of the August drouth
was about 800 miles further south
west than l had calculated and it is
now seen that the central parts OF
the drouth was not far from centra
Texas. On account of this error ths
line between the expected norther:
excessive rains and the expected
drouth In southern part of the corr
section, was further southwestwarf
than calculated.
/ Frost May be Expected.
This leaves the frost king mastel
of the situation. Where the droutt
prevailed killing frosts may not bt
feared before Sept. 20. Both furth :,
north, where rains have been exces
sive and the crops are not mature
the early frosts now become a danger
Gus element in the cropweather ques
ton
There are four periods to be watch
ed and feared, Sept. 4, 10, 16, and q
Killing frosts are expected to reac'
parts Of Canada and some northern
sections of the states not far fror
Sept. 4, along meridian 90; littl
earlier west of that line and littl
later east of it. After that each s,lt
cessive frost date given is expecte
to send killing frosts further south
The last one, about Sept. 81, reachin
northern parts of the cotton belt.
We are now able to approximat
, the dates and location of the locs
drouths, excessive rains and frost
and we are rapidly approaching thu
perfection in the calculations that wi
a enable us to be much more success
: full in forecasting these three impo
tant features of the weather.
Cool Wave Coming.
About August 81, expect the HI
wave of the disturbance to be nes
meridian go. On that meridian, an
d a little later further east. expect a
Il extensive cool wave not long ate
s Sept. 1. The fall in temperature WI
5 be great, reaching Its lowest on tn,
J. line not far from Sept. 4.
l expect the southwestern drouth
II be broken within the week who's
a. central Uay VIII US Sept. anu III
D week will be momentous period {
Q to killing frosts in the northern STATE
q and the spring wheat Of Canada.
= The storms about and immediate
"a following Sept. will be Of great
+ than average force or intensity al
!, will affect the whole continent. B
), my readers must not understand Il
: word storm to mean anything d
i. structive. We; say rain storm, he
t. storm, snow storm, etc. without il
II plying anything dangerous. use Il
G. shorter term, storm, for conyentene
b. When l expect dangerous storm "
se will have no reason for misunde
Id standing my meaning.
l now have a good force Of cler
le at work on the weather records al
II the calculations of the 1908 wealth
OF forecasts. With past experience,
IN newed health, and better facilities
Ut hope for great improvements over
=. past efforts.