ENG-1983 — Page 410

HONG KONG CLIMATE

TEMPERATURE & RELATIVE HUMIDITY

20

30

40

C

50

%

MONTHLY RAINFALL

mm

90

1400

1951-1980

MEAN MONTHLY

RELATIVE HUMIDITY

AIR TEMPER

70

1200

80

1000

400

200

1887

1983

1983

10

0

MONTH 1 2 3 4 5 6 7 8

9 10 11 12 MONTH

MONTH 1 2 3 4

MEAN ANNUAL RAINFALL

1953-1982

0

ง

-1600-

Mun

Yuen Long

KOWLOON

km 0

4

12

16

20 km

Series AR/8/CM

LID

Cartography by Survey Division, Lands Department.

Hong Kong Government.

926!

1917

1982

1952

1974

1914

1952

RAINFALL

YEAR

RECORDED

FAINFALL SCALE

WETTEST YEAR ON RECORD 1982

3247.5mm

MILLIMETRES

MAXIMUM

4000

MONTHLY

(1884-1939)

3600

&

Mean Annual 1951-1980

1982

(1947-1983)

3200

Rainfall

2800

-1982

2400

2000

1600

1200

1974

MEAN MONTHLY (1951-1980)

RAINFALL

5 6 7 8 9 10 11 12 MONTH,

--400-13OHYETS

-800-(in millimetres)

yourung

Waglan

o Island

2000

1600

Ping Chau

WIND ROSE

ROYAL OBSERVATORY HEADQUARTERS (1951-1980)

variable 0.3%

N

15%

20%

25%

30%

2800

Yuen Long

KOWLOON

-2800-

-3200

Waglan Island

km 0

4

8

12

20 km

BEAUFORT SCALE AND EQUIVALENT SPEEDS

WIND

DESCRIPTIVE TEAMS

Calm

Light wind

Moderate wind

SUSTAINED WIND SPEED IN KNOTS

BEAUFORT FORCE

<1

1-6

0 1-2

7-16

3-4

Fresh wind

Strong wind

Gale

Storm

Hurricane

17-21

5

22-33

6-7

34-47

8-9

48-63

>63

10-11 12

1-2

1-6

3-4 5-6 > 7. Beaufort force

7-18 17-27 28 Wind speed

in knots

Beaufort Scale - An international system

for describing wind force.

Knot - 1 knot is 1 nautical mile per hour

which is 1.852 kilometres per hour.

{

E

FREQUENCY OF OCCURRENCE OP WIND DIRECTION AND SPEED

THE BOYAF OBSERVATORY HEADQUARTERS AND WAGLAN ISLAND

JBE

J

MONTH,PALVAILING WIND DIRECTION AND MEAN SPEED

OBSERVED AT WAGLAN ISLAND (1953-1962)

WIND ROSE WAGLAN ISLAND

(1975-1980) variable 0.3%

knots

12.8

12.4

11.6 10.4

10.2

11,3

10.3

919

11.6

14.0

14.4

13.4 knots

JAN

FEB

MAR IPA

MAY JUN

JUL

AUG

SEP

OCT

NOV

DEC

calm

1.4%%

10%

15%

20%

25%

30%

$

Data supplied by the Royal Observatory, Hong Kong.

E

Ping

Chau