WEATHER SUMMARY AND RADIATION LEVEL ON 19/04/2008

HKO READINGS & RADIATION LEVEL

WEATHER SUMMARY AND RADIATION LEVEL ON 19/04/2008:
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HONG KONG OBSERVATORY
MAXIMUM AIR TEMPERATURE                       25.4 C
MINIMUM AIR TEMPERATURE                       20.6 C
GRASS MINIMUM TEMPERATURE                     20.5 C
RELATIVE HUMIDITY                         81 - 100 PERCENT
RAINFALL                                     237.4 MM
TOTAL RAINFALL SINCE 1ST JANUARY             364.0 MM
AGAINST AN AVERAGE OF                        265.0 MM

OTHER STATIONS                MIN                  MAX
KING'S PARK                  20.4 C               25.5 C
WONG CHUK HANG               21.5 C               25.7 C
TA KWU LING                  21.1 C               25.9 C
LAU FAU SHAN                 21.2 C               25.4 C
TAI PO                       21.2 C               25.6 C
SHA TIN                      20.9 C               26.2 C
TUEN MUN                     21.9 C               25.8 C
TSEUNG KWAN O                20.5 C               25.1 C
SAI KUNG                     20.8 C               25.2 C
CHEUNG CHAU                  20.9 C               23.5 C
CHEK LAP KOK                 22.0 C               26.6 C
TSING YI                     20.8 C               24.0 C
SHEK KONG                    21.4 C               25.1 C
TSUEN WAN                    20.3 C               24.2 C
HONG KONG PARK               20.8 C               25.1 C
SHAU KEI WAN                 20.7 C               25.4 C
KOWLOON CITY                 20.7 C               25.7 C

DURATION OF SUNSHINE (KING'S PARK):              0.0 H

THE MEAN UV INDEX RECORDED AT KING'S PARK YESTERDAY WAS
0.1, THE UV INTENSITY WAS LOW.
THE MAXIMUM UV INDEX FOR YESTERDAY WAS 0.4.
SEA SURFACE TEMPERATURE (WAGLAN ISLAND):        22.6 C

(19 APR 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                          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 1987-2005, 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.