F 7
18. Floods.-The railway embankment at Shatin was washed away by floods on April 20.
The heaviest rainfall occurred at the Observatory as follows:-
Period 1931 Amount Duration Greatest fall in 1 hour d. h. inches. h. Amount inches. Time April... 19 16 to 22 22 4.19 99 0.97 April...19 21 May... 20 5:21 to 20 17 4.14 36 0.83 May...20 2 June... 26 12 7:17 to 15 16 6.56 32 0.39 June...26 6 July... 15 1 19 2-71 to 14 9 4.18 33 0.95 July...15 14 Aug... 1 18 1:01 to 4 4.99 55 2.55 Aug. 1 18 Aug... 13 7 0:51 to 16 0 8.29 62 0.66 Aug....13 7 Aug... 16 18 3:30 to 2.03 2.03 6 0.82 Aug....16 18 Sept.. 2 2 8 23 to 20 16 2.8 22 0.51 Sept. 2 21 Dec... 9 4 13 to 9 4 4.07 17 0.63 Dec. 9 4The greatest fall in one minute was 0.83 inch at 12h. 12m. on May 31.
19 Typhoons.-The tracks of 19 typhoons which occurred in the Far East during the year 1931 are given in the Monthly Meteorological Bulletin for December.
20. A typhoon passing about 30 miles to the S.W. of Hong Kong, on August 1, produced a gust velocity at the Observatory of 136 m.p.h. from E.N.E. at 11h. 47m. The lowest barometer reading, reduced to sea-level and standard gravity, was 29.134 inches at 17h. on the 16th. A second, passing about 60 miles to the east of the Observatory, produced a strong gale at Gap Rock but only a fresh breeze at the Observatory. A third, passing between Gap Rock and Hong Kong on September 2, produced a gust velocity at the Observatory of 94 m.p.h. from S. by E. at 21h. 00m. The lowest barometer reading, reduced to sea-level and standard gravity, was 29.186 inches at 14h. 55m.
IV. PUBLICATIONS.
21. Daily Weather Report and Map.-A weather map of the Far East, for 6 a.m. of the 120 meridian time, is constructed daily and lithographed at the Observatory. Isotherms have been included since March 6. On the verso of the map is printed the morning weather report, from 40 to 50 stations in China, Indo-China, Japan, Korea, Borneo and the Philippines, and a weather forecast for the following districts:-
1. Formosa Channel.
2. S.E. Coast of China between Hong Kong and Lamocks.
3. Hong Kong to Gap Rock.
4. S. Coast of China between Hong Kong and Hainan.
F 7
18. Floods.-The railway embankment at Shatin was wash- ed away by floods on April 20.
The heaviest
follows:-
rainfall
occurred
at the Observatory as
May
June
July Aug.
Period
1931.
2. h.
April... 19 16
.19 6 22 22 9 4
d.
h.
inches.
1.
4
to
Aug.
12
Aug. .16 0 Sept..
2 2 2 8 229 23
to
20 16
5:21
to
20 17
4.14
26 12
7:17
to
15 16
6:56
1 19
2-71
to 14 9
4.18
to 17 13 to 5 13 to 9 4
4:07
hours.
Amount.
ដ៩៧ – មន្រ្តី៖ Duration.
Greatest fall in 1 hour.
Amount.
inches.
Time.
a.
h.
April...19 21 May ...20 2 June...26 6 July...15 14
---
2 55
0.97
0.39
0.95
0.82
Aug. 1 18
1:01
Aug....13
7
0:51
4.99
36
0.66
...
Aug....16 18 Sept. 2 21
330
2.03
Dec.
Dec. 9 4
The greatest fall in one minute was 0.83 inch at 12h. 12m. on May 31.
19 Typhoons.-The tracks of 19 typhoons which occurred in the Far East during the year 1931 are given in the Monthly Meteorological Bulletin for December.
20. A typhoon passing about 30 miles to the S.W. of Hong Kong, on August 1, produced a gust velocity at the Observatory of 136 m.p.h. from E.N.E. at 11h. 47m. The lowest barometer reading, reduced to sea-level and standard gravity, was 29.134 inches at 17h. on the 16th. A second, passing about 60 miles to the east of the Observatory, produced a strong gale at Gap Rock but only a fresh breeze at the Observa- tory. A third, passing between Gap Rock and Hong Kong on September 2, produced a gust velocity at the Observatory of 94 m.ph. from S. by E. at 21h. 00m. The lowest barometer reading, reduced to sea-level and standard gravity, was 29.186 inches at 14h. 55m.
IV. PUBLICATIONS.
21. Daily Weather Report and Map.-A weather map of the Far East, for 6 a.m. of the 120 meridian time, is constructed daily and lithographed at the Observatory. Isotherms have been included since March 6. On the verso of the map is printed the morning weather report, from 40 to 50 stations in China, Indo-China, Japan, Korea, Borneo and the Philippines, and a weather forecast for the following districts:-
1. Formosa Channel.
2. S.E. Coast of China between Hong Kong and
Lamocks.
3. Hong Kong to Gap Rock.
4. S. Coast of China between Hong Kong and Hainan.
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