HKO READINGS & RADIATION LEVEL


CORRECTION TO PRESS WEATHER NO. 006

YESTERDAY'S WEATHER AND RADIATION LEVEL:
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HONG KONG OBSERVATORY
MAXIMUM AIR TEMPERATURE                       32.9 C
MINIMUM AIR TEMPERATURE                       28.5 C
GRASS MINIMUM TEMPERATURE                     27.9 C
RELATIVE HUMIDITY                          66 - 90 PERCENT
RAINFALL                                         0 MM
TOTAL RAINFALL SINCE 1ST JANUARY            1867.4 MM
AGAINST AN AVERAGE OF                       1562.4 MM
 
OTHER STATIONS                MIN                  MAX
KING'S PARK                  28.4 C               33.1 C
WONG CHUK HANG               27.6 C               32.0 C
TA KWU LING                  25.5 C               34.6 C
LAU FAU SHAN                 27.4 C               33.8 C
TAI PO                       27.0 C               34.2 C
SHA TIN                      27.4 C               34.0 C
TUEN MUN                     27.5 C               33.5 C
TSEUNG KWAN O                26.9 C               34.4 C
SAI KUNG                     27.3 C               34.6 C
CHEUNG CHAU                  27.3 C               32.3 C
CHEK LAP KOK                 29.0 C               34.7 C
TSING YI                     27.7 C               32.7 C
SHEK KONG                    27.0 C               34.9 C
TSUEN WAN HO KOON            26.7 C               31.8 C
TSUEN WAN SHING MUN VALLEY   28.0 C               33.6 C
HONG KONG PARK               28.4 C               33.2 C
SHAU KEI WAN                 27.8 C               33.8 C
KOWLOON CITY                 28.1 C               34.1 C
HAPPY VALLEY                 28.5 C               34.6 C
WONG TAI SIN                 28.5 C               34.4 C
STANLEY                      26.8 C               31.9 C
KWUN TONG                    28.4 C               33.9 C
SHAM SHUI PO                 28.5 C               33.0 C
KAI TAK RUNWAY PARK          28.2 C               34.4 C
YUEN LONG PARK               27.0 C               35.0 C
TAI MEI TUK                  27.5 C               34.4 C
 
DURATION OF SUNSHINE (KING'S PARK):             11.0 H
 
THE MEAN UV INDEX RECORDED AT KING'S PARK YESTERDAY WAS 6,
THE UV INTENSITY WAS HIGH.
THE MAXIMUM UV INDEX FOR YESTERDAY WAS 12.
SEA SURFACE TEMPERATURE (WAGLAN ISLAND):     NO DATA
 
YESTERDAY'S (6 AUG 2017) AVERAGE AMBIENT GAMMA RADIATION
DOSE RATE TAKEN OUTDOORS IN HONG KONG RANGED FROM 0.08 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
                            (MICROSIEVERT/HOUR)
PING CHAU                           0.08
TAP MUN                             0.09
KAT O                               0.08
YUEN NG FAN                         0.11
TAI MEI TUK                         0.12
SHA TAU KOK                         0.10
KWUN TONG                           0.11
SAI WAN HO                          0.08
KING'S PARK                         0.14
TSIM BEI TSUI                       0.12
CAPE D'AGUILAR                      0.13
CHEK LAP KOK                        0.14

 
NOTE
1.     FROM READINGS TAKEN AT VARIOUS LOCATIONS IN HONG KONG DURING
       THE PERIOD 1987-2016, THE BACKGROUND AMBIENT GAMMA RADIATION
       LEVELS MAY VARY BETWEEN 0.06 AND 0.30 MICROSIEVERT PER HOUR.
 
2.     THE EXTENT OF HEALTH EFFECTS TO A PERSON AS A RESULT OF
       EXPOSURE TO RADIATION IS EXPRESSED BY A PHYSICAL QUANTITY
       CALLED EQUIVALENT DOSE, IN UNIT OF SIEVERT.  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 IN
       A RELATIVELY SHORT PERIOD OF TIME. FOR EXAMPLE, A DOSE OF
       5000 MICROSIEVERTS MAY BE REACHED WHEN THE AMBIENT GAMMA
       DOSE RATE IS 1000 MICROSIEVERTS PER HOUR (SEVERAL THOUSAND
       TIMES ABOVE BACKGROUND) AND LASTS FOR 5 HOURS.
 
3.     THE READINGS OF AMBIENT GAMMA RADIATION LEVEL FROM
       INSTRUMENT ARE EXPRESSED IN UNIT OF GRAY, WHICH IS
       NUMERICALLY EQUAL TO THE GAMMA DOSE EXPRESSED IN SIEVERT.

DISPATCHED BY HONG KONG OBSERVATORY AT 07:02 HKT ON 07.08.2017