Yesterday's Weather and Radiation Level

HKO READINGS & RADIATION LEVEL

YESTERDAY'S WEATHER AND RADIATION LEVEL:
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HONG KONG OBSERVATORY
MAXIMUM AIR TEMPERATURE                       29.9 C
MINIMUM AIR TEMPERATURE                       26.6 C
GRASS MINIMUM TEMPERATURE                     25.8 C
RELATIVE HUMIDITY                          73 - 94 PERCENT
RAINFALL                                       6.3 MM
TOTAL RAINFALL SINCE 1ST JANUARY            2721.1 MM
AGAINST AN AVERAGE OF                       1927.8 MM

OTHER STATIONS                MIN                  MAX
KING'S PARK                  25.7 C               29.6 C
WONG CHUK HANG               25.9 C               30.0 C
TA KWU LING                  24.3 C               31.4 C
LAU FAU SHAN                 25.8 C               29.6 C
TAI PO                       26.0 C               29.0 C
SHA TIN                      24.7 C               29.6 C
TUEN MUN                     26.7 C               32.2 C
TSEUNG KWAN O                24.6 C               31.0 C
SAI KUNG                     24.4 C               29.3 C
CHEUNG CHAU                  25.0 C               31.0 C
CHEK LAP KOK                 26.9 C               31.5 C
TSING YI                     25.8 C               29.5 C
SHEK KONG                    24.3 C               30.6 C
TSUEN WAN                    24.1 C               28.2 C
HONG KONG PARK               25.6 C               30.6 C
SHAU KEI WAN                 25.5 C               29.7 C
KOWLOON CITY                 24.9 C               30.2 C

DURATION OF SUNSHINE (KING'S PARK):              1.7 H

THE MEAN UV INDEX RECORDED AT KING'S PARK YESTERDAY WAS 2,
THE UV INTENSITY WAS LOW.
THE MAXIMUM UV INDEX FOR YESTERDAY WAS 5.
SEA SURFACE TEMPERATURE (WAGLAN ISLAND):        24.4 C

YESTERDAY'S (5 SEP 2008) 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                               0.10
YUEN NG FAN                         0.12
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 1987-2007, 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.