Arizona republican. [volume] (Phoenix, Ariz.) 1890-1930, 1907-05-22
WEEKLY WEATHER BULLETIN.
For the Week Ending May 20, 1907.
GENERAL SUMMARY.


Partly cloudy to cloudy weather,
with light rain and snow over the
northern counties late on Monday the
| 18th, and cloudiness generally, with
| light showers over the central counties
on Friday, were the most noteworthy
features OF the weather for the week
From Tuesday to Thursday, and on
Saturday and Sunday. the weather was
, clear. The early part of the week was
windy, accompanied by severe sand
storms. A maximum wind velocity of
80 miles per hour, from the west, was
recorded at Yuma, on the 18th. The
prevailing wind-directions and the
average wind-velocities were as fol-
lows: For the northern counties. west,
6 miles per hour; central counties.
southwest, miles per hour. and for
the southern counties. southwest, 6
miles per hour. There were 5 clear
days, partly cloudy and 1 cloudy day.
The total weekly amounts of precipi-
tation were as follows: At Flagstaff,
col inch, a deficiency of O.49 inch;
Phoenix trace, or normal; Yuma. 600
inch. or normal. At Phoenix. the
weekly mean humidity was "a per
NAL for May. and the same as that
of the preceding week. The average
OF the daylight humidity was 10 per
cent; the average of the night hui
Nudity was 81 per cent. The greatest
humidity was 81 per cent on the 18th.
and the least humidity was per cent.
on the 18th
Temperatures remained abnormally
low until Wednesday. The maximum
for the week occurred generally on
Thursday. On Friday. Saturday and
Sunday. normal thermal conditions
prevailed. over the northern counties
the minimum temperatures fell below
the freezing point almost nightly. ac-
companied by damaging frost. Light
frost formed at a few stations in the
central counties on the morning of the
18th. The weekly mean temperature
for the Territory was 81 degrees. or
degrees below the normal for May.
over the northern section. the weekly
mean temperature was As degrees. be
ing a deficiency of 3 degrees; over the
central section. - degrees. being de-
ficiency OF degrees; over the south
EN- counties. ~ degrees, being a de-
ficiency of > degrees. The extreme
ranges in temperature were as follows:
Al Flagstaff, the maximum tempera-
ture was 40 degrees. on the 10th; the
minimum temperature was ~ degrees
on the cath. At Phoenix, the maxi
mum temperature was IS degrees, on
the 18th: the minimum temperature
was 80 degrees on the 18th. At Yuma,
the maximum temperature was 9S de-
hsa 10 mi
perature was "a degrees. on the 18th.
over the northern counties the night
temperatures ranged from "A degrees
to "A degrees: over the central coun-
ties from a degrees to 6S degrees. and
over the southern counties from &c
degrees to 20 degrees.
But small depths of snow remain
upon the southern exposures Of the
mountain ranges. below the 5000 foot
level The peaks and canyons of the
Bradshaw. San Francisco. Mogollon.
White Mountain and Mount Graham
ranges are still covered with snow to
the depth Of feet To feet. There are
good flows of water in the Colorado.
the Little Colorado. the Salt. ella and
Verde rivers. while in the Hassayam-
pa. the Aqua Fria and San Pedro riv-
ers. continuous flows have ceased,
leaving only small and narrow pools
of surface water. which are either
evaporating rapidly. or else feeding
numerous underground flows. Owing
TO the entire absence of precipitation.
irrigation was pursued more frequent
ly than during any other period of
this season. The main canals carried
more than the usual flows of water.
The schedule for water service was.
likewise. prolonged far beyond the
usual time for serving. The present
visible supply of water will most like
IN last until the seasonal summer rains
set in.