HKO READINGS & RADIATION LEVEL

YESTERDAY'S WEATHER AND RADIATION LEVEL:
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HONG KONG OBSERVATORY
MAXIMUM AIR TEMPERATURE                       25.2 C
MINIMUM AIR TEMPERATURE                       23.8 C
GRASS MINIMUM TEMPERATURE                     24.1 C
RELATIVE HUMIDITY                          89 - 98 PERCENT
RAINFALL                                       5.6 MM
TOTAL RAINFALL SINCE 1ST JANUARY             256.1 MM
AGAINST AN AVERAGE OF                        540.5 MM
 
OTHER STATIONS                MIN                  MAX
KING'S PARK                  23.3 C               25.0 C
WONG CHUK HANG               23.7 C               25.7 C
TA KWU LING                  24.0 C               27.0 C
LAU FAU SHAN                 24.4 C               28.5 C
TAI PO                       23.9 C               24.9 C
SHA TIN                      24.0 C               25.5 C
TUEN MUN                     24.9 C               27.4 C
TSEUNG KWAN O                22.9 C               24.4 C
SAI KUNG                     23.5 C               25.4 C
CHEUNG CHAU                  23.8 C               25.4 C
CHEK LAP KOK                 25.0 C               28.0 C
TSING YI                     24.7 C               27.0 C
SHEK KONG                    24.7 C               27.7 C
TSUEN WAN HO KOON            23.8 C               26.2 C
TSUEN WAN SHING MUN VALLEY   24.5 C               26.8 C
HONG KONG PARK               23.3 C               25.3 C
SHAU KEI WAN                 23.0 C               24.5 C
KOWLOON CITY                 23.3 C               25.3 C
HAPPY VALLEY                 24.1 C               26.2 C
WONG TAI SIN                 23.8 C               25.8 C
STANLEY                      23.4 C               25.2 C
KWUN TONG                    23.4 C               25.0 C
SHAM SHUI PO                 24.7 C               26.7 C
KAI TAK RUNWAY PARK          24.0 C               25.6 C
YUEN LONG PARK               25.0 C               27.5 C
TAI MEI TUK                  23.0 C               24.7 C
 
DURATION OF SUNSHINE (KING'S PARK):              0.1 H
 
THE MEAN UV INDEX RECORDED AT KING'S PARK YESTERDAY WAS 1,
THE UV INTENSITY WAS LOW.
THE MAXIMUM UV INDEX FOR YESTERDAY WAS 3.
SEA SURFACE TEMPERATURE (WAGLAN ISLAND):        25.5 C
 
YESTERDAY'S (22 MAY 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                             0.08
KAT O                               0.09
YUEN NG FAN                         0.11
TAI MEI TUK                         0.12
SHA TAU KOK                         0.10
KWUN TONG                           0.12
SAI WAN HO                          0.09
KING'S PARK                         0.14
TSIM BEI TSUI                       0.13
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 00:16 HKT ON 23.05.2017