SUMMARY FOR THE MONTH OF 
191 2 - 
Data for pressure dry aud wet thermometers, dew-point, humidity, vapor pressure, and mean cloudiness are in 75th meridian time. All other data are in 
the standard of time in local use. 
Mean. 
8 a. m. 
8 p. m. 
Monthly. 
( 9 ) 
2-7 
Corrected mean_ 
Dry - . 
8 a. m. 
a 
di 
00 
(8+8)-=-2 
(g) 
8 a. m. 
8 p. m. 
(S^L 
PRESSURE. 
(Correction to reduce to a 24-hour mean . 
) 
STATION. 
Highest. 
w 
Date. 
:z- 
Lowest. 
w 
Date. 
Absolute 
range. 
2-f" /, 
REDUCED. 
Mean. 
At). 2^3 
8 p. m. 
Corrected mean- 2-0 S~ 
Monthly. 
( 9 ) 
Highest. 
(ft) 
J^.7 1 / 
3,500-ft_ 
Date. 
Lowest. 
W 
Date. 
10,000-ft. 
Absolute 
range. 
/• o 7 
TEMPERATURE. 
MEAN. 
W ET. 
8 a. m. 
2-/.y 
8 p. m. 
Monthly. 
(g) 
Max. 
A57 Y 2-0.Q 
Min. 
Monthly. 
(g) 
Dew-point. 
Monthly. 
iff) 
Relative Humidity. 
8 a. m. 
± 
8 p.m. 
Monthly. 
(g) 
Vapor Pressure. 
8 a. m. 
II -2 
8 p. m. 
Monthly. 
( 9 ) 
Sea- 3,500- 
level. ft. 
(g)! (g) 
10 , 000 - 
ft. 
(g) 
High- 
est. 
(0 
6 
Date. 
(i) 
<31 
Lowest. 
to 
2 - 
NUMBER OF D 
AYS WITH— U) 
Maximum. 
Minimum. 
32° 
or below. 
90° 
or above. 
32° 
or below. 
Zero 
or below. 
1 // 
o 
^7 
o 
Date. 
(*') 
Absolute 
range. 
& o 
Greatest 
daily range. 
Date. 
Least daily 
range. 
Date. 
(•) 
to 
(i) 
(0 
/c *' 
WIND. 
Total movement 
(mid. to mid.). 
6 7 >2' 
~e> 
Average 
hourly 
velocity. 
f-7 
Prevailing 
direction. 
Ip) 
Maximum 
velocity. 
(r) 
J 
Direction. 
(r) 
Date. 
(r) 
Number of Times Wind Observed from the- 
N. 
2 
NE. 
/ g 
E. 
<7 
SE. 
s. 
sw. 
w. 
NW. 
Calm. 
/ 
7 
7 
WEATHER. 
Mean Cloudiness. 
Sunshine. 
Number of Days. 
8 a. m. 
8 p. m. 
Monthly. 
(0 
Percentage of 
possible. 
Clear. 
Partly cloudy. 
Cloudy. 
7./ 
*~.7 
oJT 
/7 . 
7 
Number of Days with Precipitation (Mid. to Mid.). 
Clear. 
(») 
Partly cloudy. 
(«) 
Cloudy. 
(«) 
7 
MISCELLANEOUS PHENOMENA. 
DATES OP —(MIDNIGHT TO MIDNIGHT). 
Frosts. 
Thunderstorms. 
(»> 
Winds. 
(40 miles or over.) 
Solar 
Halos. 
Lunar 
Halos. 
Light. 
Heavy. 
Killing. 
—- 
-— 
- 
tc *r 
7-/6 
Fog. 
Light. 
Dense. 
Haze. 
Light. 
Dense. 
Smoke. 
Light. 
Dense. 
< . 
Hail. 
Aurora. 
PRECIPITATION (in inches and hundredths), (m) 
TOTAL 
AMOUNT. 
Greatest 
Amount in 24 
Consecutive 
Hours. 
EXCESSIVE. 
NUMBER OF DAYS WITH—(Min. to Mid.). 
2.50 Inches in 24 Hours. 
(0 * 
1 Inch per Hour. 
(1) 
Trace. 
.01 
or more. 
.04 
or more. 
.25 
or more. 
1.00 
or more. 
Total. 
Am’t. 
Date. 
(*) 
Am’t. 
Duration. 
h. m. 
Date. : 
») i 
Am’t. 
Duration. 
h. m. 
Date. 
w 
P./rO 
'2-0 * 
£ r /“ 
_— 
— 
-— 
■ -- 
•— 
7 
tT 
& 
d? 
/ 
SNOW. 
Snow. 
Total 
Depth. 
(O) 
Average 
Depth at 
End of 
Month. 
Trace 
or 
more. 
.01 or 
more 
melted. 
/ f 
7 
/vnr 
(w) Maximum precipitation in 5 minutes_, date 
EXCESSIVE. 
f 
Date. 
Total Duration. 
From— 
To— 
Total 
am’t of 
precipi¬ 
tation. 
Excessive Rate. 
Began— 
a—<?. 
Ended— 
Am’t 
before 
excess¬ 
ive 
began. 
Accumulated Depths during Excessive Rate, for Consecutive Periods of Time indicated below. 
5 
min. 
10 
min. 
15 
min. 
20 
min. 
25 
min. 
30 
min. 
35 
min. 
40 
min. 
45 
min. 
50 
min. 
(50 
min. 
80 
min. 
100 
min. 
120 
min. 
the duration is the time precipitation was actually recorded. 
8-154 
Weather Bureau. 
