Arizona republican., 1907-07-26
WEEKLY WEATHER BULLETIN.
For the Week Ending July %, 1907.
= GENERAL SUMMARY.

4
The temperature increased slowly
till Thursday, when the maximum
temperature for the week occurred.
From Friday to Sunday, there was a
slow decrease. Light frost formed over
several localities of the northern coun-
ties on Tuesday morning. The night
temperatures over the northern coun-
ties ranged from SO degrees to So de-
grees; over the central counties from
"a degrees to SO degrees; over the
southern counties from So degrees to
81 degrees. For the northern section.
the weekly mean temperature was 60
degrees, being a deficiency of de-
grees; for the central counties. IS de-
grees. being a deficiency of 2 degrees;
/ for the southern counties. Sc degrees,
being a deficiency of degrees. The
/ extreme ranges in temperature were
as follows: At Flagstaff, the maxi
mum temperature was 50 degrees. on
! the 18th; the minimum temperature
/ was 80 degrees. on the 10th. At Phoe-
nix, the maximum temperature was
106 degrees, on the 18th; the mini
mum temperature was 6S degrees, on
the 10th. At Yuma, the maximum
temperature was 1O6 degrees, on the
18th; the minimum temperature was
6S degrees. on the 18th.
| Light and scattered showers &C.
CURED in the southern section on
Thursday, and in the northern and
central sections on Friday, Sat-
urday and Sunday. An excess
sive rainfall of Loo inches, In
two ard half hours. was
measured at Seligman. on the 18th.
Western Pima, southern Maricopa,
Yuma and Mohave counties were rain
less. The week gave three clear days
and four partly cloudy days. The
Isunshine was slightly excessive. High
winds were recorded as follows:
Flagstaff. 80 miles per hour. from the
east. on the 18th; Phoenix. SO miles
per hour, from the east, on the 21st
The wind-movement was less than
that of the preceding week. The pre-
ivailing wind directions and the aver
age wind velocities were as follows
! For the northern section, the prevail
ing wind direction was northwest, and
the average hourly wind velocity, s
miles per hour; central section. west,
JIG miles per hour: southern section,
southwest. miles per hour. The to-
tai weekly amounts Of precipitation
were as follows: At Flagstaff. 0.50
inch, being an excess of 005 inch;
Phoenix, 0.32 inch, being def
cheney of 0.1O inch: Yuma, 600
inch, being a deficiency Of 600
inch. At Phoenix. the weekly
mean humidity was &c per cent. or s
per cent less than the normal for Jtly.
and IL per cent less than the mean
!, humidity of the preceding week. The
average of the daylight humidity was
Is per cent: the average of the night
. humidity was SO per cent. The great
est humidity was Sc per cent. on the
: 21st; the least was per cent, on the
18th.
A few patches of snow still remain
over the higher peaks of the San
t Francisco. the Mogollon and Mt. Gra-
ham ranges. The rainfall over the
upper catchment basins of the ella
Salt, San Pedro. Verde and Little Col
orado rivers have produced no appre-
, cable run-off. There is n small in
crea Sc in the volume OF water in the up
Little Colorado rivers. resulting from
the rains of the previous week. The
river beds of the lower San Pedro, the
Aqua Fria, lower Hassayampa. the
e Bill Williams Fork, the lower Salt, and
J lower ella are almost dry. The water
= holes upon the cattle ranges are great
n ily in need of replenishment. The Col
] orado river at Fort Mohave is reced-
r ing rapidly. while at Yuma the dept
remains abnormally high. Compared
with the corresponding week of the
summer of 1906, the volume of water
( is somewhat less. AS yet. the volume
v of water in the rivers at the intakes
e of the larger canals, in the centra
and eastern sections. is of sufficien
depth to assure maximum flows with
t in the smaller canals. cross-cut canal
: and laterals. Water was served, unde
. full head and flow, without Interrupt
= ton, thruout the entire week, within
the canal zones.