YESTERDAY'S WEATHER AND RADIATION LEVEL :

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HONG KONG OBSERVATORY

MAXIMUM AIR TEMPERATURE 25.8 C

MINIMUM AIR TEMPERATURE 23.3 C

GRASS MINIMUM TEMPERATURE 21.6 C

RELATIVE HUMIDITY 71 - 88 PERCENT

RAINFALL 0 MM

TOTAL RAINFALL SINCE 1ST JANUARY 360.7 MM

AGAINST AN AVERAGE OF 354.7 MM

OTHER STATIONS MIN MAX

KING'S PARK 22.5 C 26.7 C

WONG CHUK HANG 23.6 C 26.5 C

TA KWU LING 23.0 C 27.4 C

LAU FAU SHAN 22.9 C 28.9 C

TAI PO 23.7 C 25.7 C

SHA TIN 23.3 C 26.2 C

TUEN MUN 23.6 C 27.4 C

TSEUNG KWAN O 23.0 C 24.6 C

SAI KUNG 23.6 C 24.8 C

CHEUNG CHAU 22.3 C 26.8 C

CHEK LAP KOK 24.0 C 28.9 C

TSING YI 22.9 C 27.2 C

SHEK KONG 23.3 C 27.8 C

DURATION OF SUNSHINE (KING'S PARK): 4.8 H

THE MEAN UV INDEX RECORDED AT KING'S PARK YESTERDAY

WAS 5, THE UV INTENSITY WAS MODERATE.

THE MAXIMUM UV INDEX FOR YESTERDAY WAS 11.

SEA SURFACE TEMPERATURE (WAGLAN ISLAND): NO DATA

YESTERDAY'S ( 7 MAY) AVERAGE AMBIENT GAMMA RADIATION DOSE RATE

TAKEN OUTDOORS IN HONG KONG RANGED FROM 0.09 TO 0.14

MICROSIEVERT PER HOUR. THESE ARE WITHIN THE NORMAL RANGE OF

FLUCTUATION OF THE BACKGROUND RADIATION LEVEL IN HONG KONG.

(SEE NOTE). THE AVERAGE DOSE RATES MEASURED AT THE RADIATION

MONITORING STATIONS OVER VARIOUS PARTS OF THE TERRITORY WERE AS

FOLLOWS :

STATION YESTERDAY'S AVERAGE

(MICROSIEVERTS/HOUR)

PING CHAU 0.09

TAP MUN 0.09

KAT O 0.11

YUEN NG FAN 0.11

TAI MEI TUK 0.12

SHA TAU KOK 0.10

KWUN TONG 0.13

SAI WAN HO 0.10

KING'S PARK 0.14

TSIM BEI TSUI 0.13

NOTE

1 FROM READINGS TAKEN AT VARIOUS LOCATIONS IN HONG KONG DURING

THE PERIOD 1987-1993, THE BACKGROUND AMBIENT GAMMA RADIATION

LEVELS MAY VARY BETWEEN 0.06 AND 0.3 MICROSIEVERT PER HOUR.

2 PROTECTIVE ACTION MAY BE REQUIRED IF THERE IS AN INCREASE IN

THE AMBIENT GAMMA DOSE RATE ABOVE BACKGROUND SUCH THAT THE

TOTAL ADDITIONAL DOSE IS EXPECTED TO EXCEED 5000

MICROSIEVERTS.

3 FOR EXAMPLE, IF AMBIENT GAMMA RADIATION IS THE ONLY FACTOR

CONTRIBUTING TO THE RADIATION DOSE TO A PERSON, THIS DOSE

OF 5000 MICROSIEVERTS MAY BE REACHED WHEN THE AMBIENT GAMMA

DOSE RATE IS 1000 MICROSIEVERTS PER HOUR (MORE THAN 3000

TIMES ABOVE BACKGROUND) AND LASTS FOR 5 HOURS; OR WHEN THE

DOSE RATE IS 200 MICROSIEVERTS PER HOUR (MORE THAN 600

TIMES ABOVE BACKGROUND) AND LASTS FOR 25 HOURS.

DISPATCHED BY HONG KONG OBSERVATORY AT 00:16 HKT ON 08.05.2004