FEBRUARY, 191 1. blONTHLY WEATHER REVIEW. 275
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..............
.............
......... ........
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Eureka.. 15s Red Bluff 1SR
Sarrament.o.. 19;
tjan Franriwo
1
1i9
San Jose I IS3
Frpsno ................ 1 '223
On February 36 light, snow fell in Stin Francisco, t i n t 1 the
liilis antl mountains in the vicinity were covered.
C'onditions during February, 191 1, were entirely tlif-
ferent from those of Fehrunry, 1$)10, nitli regard t o
sno\vf all.
At the close of the month there was :in :il)untlnnt hiip1)ly
of water in sight. The ticcuiiiulntetl tlepth of snuu cm
the groiintl at Suminit w:is 215 inc~lies. \\ hilr at the smie
(late last year there were hut 72 inche-, antl thc. year
before that tiboiit 160 inches. The niem tlepth of h n o w
on the groiin(1 at this level, basetl upon recortl- coveriiig
many years, is SO invhes. It will tliereiore 1)e seen that
there is nearly three times AS much snow on the grvuntl
as in n noriiitil senson.
SUNSHINE.
The following table gives the hours of sunshine antl
percent tiges of possible :
~~
..... S:m Luis fltiispn. lljJ
LosAng?lt.s ........... 30; I
Ran Dipyo.. 193 I ., Mount Tanirtlpais.. ... 1.56 51
Alturas -1 .. Santa l'ruz.. ..........
..........
00
-u ............... ......
I .---.--- I -
Per cent Prr rriit
Stations.
~
Hours.
1
o f t o p ' 1 i
EARTHQUAKES.
Eartliqunkes were recortletl on tlie Wl'iec*liert -eisiiio-
graphs at Stiiita Clara College, nntl rel'ortetl 1)y the Rev.
Jerome S. Ricml. S. J.. ti.: follons: Feliruiiry i, 5 :I B :O X
n. in. to .5:21:42; origin, 103 kiluiiieters northwest 1 )~-
west. February IS, 11:X):IX a. m. t o 11:55; origin,
far away on ocean 1)ottom. Rl;inj- sninll treiiiors (Itiring
the hIacecloniu cliidre, February 19. Lo.: Gnto-, Fe1)-
ruary 7, .5:1F) a. in., Rlr. Irving H. Snj-tler rrlmrts a liqlii
shock, cluration five secontls, recorihl liy (*lock : but t1ii.c
is only sensitive to more pronoiincrd vilnxtion-, .:o tlint t,he total tliiration was prohalily eight or nilit1 .:emnd.:. ,4 lesser shock \vns tlioiiglit, by some to hnre occurreil nbout
3 a. ni. sanie (late.
L i s L41alii~>s, 2~1;
Hollister, 7th; Boulder C'rerk, 7th; Long T'alley. 13th;
('amphell, 7th: Point Loma, 2t1, Wh, 1 3 t l i , 15tli, 19th,
33~1, 25th, 27t,h, and 88th.
Other reports of enrtlirlunkeh were:
stage at Snn Joaquin Bridge on the 1st) of 22.5 feet,
which is the highest ever before recorded in the 1iist)ory
of the ril-er. At the close of Jnnuary heavy and tlaniag-
ing floods were in progress along the San Joaquin between
llentlot R ant1 Stockton Chnnnel, along Mormon Slough,
nntl over n large area of country contiguous to the junc-
tion of tlie C'osiinines ant1 hlokelurnne Rivers, and it
lins been ehtiniiit et1 that over 300,000 acres were inun-
clntetl in tlir hections mentioned above between January
30 :inti February 4 n n r l that damage aggregating $300,000
result etl.
W'nrnings ishued hy the Weather Bureau were clis-
seiiiiiiaterl througliout all sections flooded well in advance
of the floods an(1 resulted in the estimated saving of over
$300,000 \WJrth of property.
NOTE UPON THE WEATHER AT REDLANDS, CAL.
By Nr. WM. BTOWE DEYOL.
A new tem1)ernture record mlts esttddished for Feb-
ru:iry, tlie iiienn for that month in 1911 being the lowest,
since the station \\-as opened. The mean was 47.8', or
5.S" 1)elow the nornial for Febniitry, the next lowest
nionthly iiienn being 4S.1". in 1903.
In 1003 there was a niuch greater range of temperature
ant1 the low Iiiean W :I ~ t h e to 2% large number of cold nights..
During the ]iresent month the t ernperature was more
uniform nncl there were fewer colcl nights. Only once
tluring the month did the temperature fall tis low as 32'.
There was, howeyer, not a single clay when the mean
tenilwature escee(let1 54'.
The total precipitation for the month, 3.18 inches, was
more than 50 per cent in excess of the normal, and, with
one exception, w'its the greatest recorded in 13 years.
Rain fell on 13 (lays nntl snow on two occasions. The fall
of h i l o w on tlie 15th coiitinuetl for more than an hour, and
rem:iinecl on the grcmnd thereafter about half an hour.
On the Zith light snow fell, but, melted iiiiniediately on
reaching tlie groiintl.
There were man- light but no killing frosts during the
montli. The iiieaii relative hiimidity was not. excessive.
The dew point :it tlie hour of reading the instruments in
the niternoon averagecl "3" lower than the observed tem-
perature. The least cliflerence between the observed tem-
perature and the dew point WAS 3" and the greatest 51'.
NOTES ON THE RIVERS OF THE SACRAMENTO AND
BAN JOAQUIN WATERSHEDS DURING FEBRUARY,
1911.
Sacra rnenfo mi fclak cd-The Sti c ramen t o River nht )r e
Monroeville areragetl over 1 foot below the usual Feb-
ruary stage, and in many of the upper reaches was the
lowest on record for the season. This wis especially so
during the last, decade.
From Colusa to the mouth of the river tlie Sncrnniento
was above the average, genernlly with nienacing st ages
during the first few tlnys of the month.
The American, Feather, i d Tulia Riverh were well
up to the average, with some claiiiaging freshets in many
of the smaller forks.
San, Joaqwin u~atershed.-All streaiii.: in this witerslied
averaged above the Febirinry normal, esjwcirtlly tlie
San Joaquin below the mouth of the Stnnislaus, with a
By N. R TATLOR. Local Forecaster
WORK OF THE WEATHER BUREAU IN PROTECTING
FRUIT; E SPECIALLY FROST PROTECTION.
By ALEXANDER G . MCADIE.
The following paper was read before the seventh
annunl meeting of the Western Fruit Jobbers' Associa-
tion, held at Sncrnmento, C'al., Febriiary 15 to IS, 1911.
(The paper was illustrated, and touched upon various
lines of Weather Biireau work, but only that portion
bearing upon frost protection is here given.)
C'aliforiiia in 1!)10 produced more gold than any other State or Terri-
tory in the Union. Califorilk in the same year produced 75,OOO.OOO barrels of crude oil, or nearly half the amount produced in the United
Statefl. Eut both itenis 'ire uf less interest to us who are gathered here thoii this other fact, that California produced in 1910 a fruit crop worth approximately $50.000.000. of which deciduous fruits were worth about
$SO,000.000 and citrus fruits dJollt $20,000,000; these values being
based upmi data in the annual number of the California Fruit Grower. Now, the guld and tlie oil outInit may or may not increase during the
coiuiiig years, h i t the fruit crop is in large measure under human con- trol, and there is erei-y likelihood of a rapid increase in its value.