86 
PACIFIC SCIENCE, Vol. II, April, 1948 
fences, and are therefore different for each of 
the seasonal graphs. 
Inspection of Figure 3B shows that no 8-hour 
period had a significantly low or high number 
of occurrences in either the winter or fall 
periods. In spring and summer, the lower sig¬ 
nificance limits were just reached but no highly 
significant groups were found 
On the other hand, at Leilehua, Figure 3C, 
highly significant maxima were reached in the 
hours 1100 to 1900 in winter, 1000 to 1800 in 
summer, and 2200 to 0600 in fall. The low 
significance line was reached in the 1000 to 
1800 period in spring. None of the 8-hour 
groups of Leilehua showed a highly significant 
minimum number of occurrences. 
Comparing the two stations, it appears that 
Kawaihapai has much more uniform distribu¬ 
tion of rainfall occurrences throughout the day 
than Leilehua. The former shows no consistent 
tendency for rain in any part of the day. Lei¬ 
lehua, however, has a strong and significant 
tendency to receive a maximum number of rain¬ 
fall occurrences in the afternoon during all 
seasons except fall. 
The other stations were analyzed in a similar 
manner, and the results are summarized in the 
following table. In explanation of Table 1, 
Kawailoa Girls’ School, for example, showed a 
highly significant rainfall maximum between 
the hours of 2300 and 0700 in spring. At that 
season a highly significant deficiency of rain¬ 
fall occurred between the hours of 1500 and 
2300. In summer a rainfall maximum occurred 
between the hours of 2200 and 0600, while no 
8-hour period showed a highly significant defi¬ 
ciency. Winter and fall had no 8-hour periods 
which showed a large enough or a small enough 
number of rain occurrences to reach the high 
significance limits. 
TABLE 1. HOURS OF RAINFALL MAXIMUM AND MINIMUM AT VARIOUS STATIONS 
STATION 
DISTANCE 
FROM 
CREST 
ELEVATION 
OF CREST 
ELEVATION 
OF STATION 
HOURS OF HIGHLY SIGNIFICANT NUMBER OF RAIN OCCURRENCES 
Rain occurrences 
Winter 
Spring 
Summer 
Fall 
Kawailoa ] 
Girls’ [ 
School J 
miles 
3.0* 
feet 
3,000 
feet 
300 
(Maximum number 
(Minimum number 
None 
None 
2300-0700 
1500-2300 
2200-0600 
None 
None 
None 
Waimea 
4.4 
1,000 
360 
| Maximum number 
\ Minimum number 
None 
None 
2100-0500 
1300-2100 
2100-0500 
0500-1300 
2200-0600 
None 
Honolulu 
5.2 
2,500 
50 
(Maximum number 
(Minimum number 
0000-0800 
0800-1600 
0000-0800 
0800-1600 
0000-0800 
0800-1600 
2300-0700 
0700-1500 
Opaeula ) 
No. 8 j 
6.0 
1,800 
690 
(Maximum number 
(Minimum number 
2300-0700 
None 
None 
None 
2300-0700 
None 
None 
None 
Leilehua 
10.7+ 
2,800 
920 
(Maximum number 
(Minimum number 
1100-1900 
None 
None 
None 
1000-1800 
None 
2200-0600 
None 
Kawaihapai 
13.3+ 
1,000 
200 
(Maximum number 
(Minimum number 
None 
None 
None 
None 
None 
None 
None 
None 
No. 537 ) 
Lanai J 
2.7 
2,000 
1,450 
(Maximum number 
(Minimum number 
None 
None 
None 
None 
1400-2200 
0600-1400 
0900-1700 
None 
No. 5519 ] 
Lanai ) 
3.7 
2,750 
1,350 
(Maximum number 
(Minimum number 
None 
1600-2400 
1000-1800 
None 
1100-1900 
1900-0300 
0400-1200 
None 
* On windward side of Koolau Range, 
t Situated 2 to 3 miles windward of Waianae Range. 
