HKO READINGS & RADIATION LEVEL

YESTERDAY'S WEATHER AND RADIATION LEVEL:
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HONG KONG OBSERVATORY
MAXIMUM AIR TEMPERATURE                       22.4 C
MINIMUM AIR TEMPERATURE                       19.7 C
GRASS MINIMUM TEMPERATURE                     18.8 C
RELATIVE HUMIDITY                          76 - 93 PERCENT
RAINFALL                                       7.5 MM
TOTAL RAINFALL SINCE 1ST JANUARY              74.6 MM
AGAINST AN AVERAGE OF                        190.0 MM
 
OTHER STATIONS                MIN                  MAX
KING'S PARK                  18.9 C               21.6 C
WONG CHUK HANG               19.6 C               22.9 C
TA KWU LING                  17.5 C               20.1 C
LAU FAU SHAN                 17.6 C               20.1 C
TAI PO                       18.2 C               21.0 C
SHA TIN                      18.5 C               21.3 C
TUEN MUN                     18.3 C               20.8 C
TSEUNG KWAN O                19.2 C               21.9 C
SAI KUNG                     18.8 C               21.4 C
CHEUNG CHAU                  18.8 C               22.1 C
CHEK LAP KOK                 19.0 C               22.5 C
TSING YI                     18.9 C               22.1 C
SHEK KONG                    17.8 C               21.0 C
TSUEN WAN HO KOON            18.0 C               21.1 C
TSUEN WAN SHING MUN VALLEY   18.5 C               21.4 C
HONG KONG PARK               19.2 C               22.2 C
SHAU KEI WAN                 18.9 C               22.1 C
KOWLOON CITY                 18.7 C               21.5 C
HAPPY VALLEY                 19.8 C               22.8 C
WONG TAI SIN                 19.3 C               21.8 C
STANLEY                      19.5 C               22.6 C
KWUN TONG                    18.4 C               21.0 C
SHAM SHUI PO                 NO DATA             NO DATA
KAI TAK RUNWAY PARK          19.5 C               22.2 C
YUEN LONG PARK               17.8 C               20.6 C
TAI MEI TUK                  17.9 C               20.7 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 6.
SEA SURFACE TEMPERATURE (WAGLAN ISLAND):     NO DATA
 
YESTERDAY'S (9 APR 2021) AVERAGE AMBIENT GAMMA RADIATION
DOSE RATE TAKEN OUTDOORS IN HONG KONG RANGED FROM 0.09 TO
0.15 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                           0.10
TAP MUN                             0.09
KAT O                               0.11
YUEN NG FAN                         0.13
TAI MEI TUK                         0.12
SHA TAU KOK                         0.11
KWUN TONG                           0.12
SAI WAN HO                          0.10
KING'S PARK                         0.15
TSIM BEI TSUI                       0.13
CAPE D'AGUILAR                      0.13
CHEK LAP KOK                        0.15

 
NOTE
1.     FROM READINGS TAKEN AT VARIOUS LOCATIONS IN HONG KONG IN THE
       PAST, THE HOURLY MEAN AMBIENT GAMMA RADIATION DOSE RATE MAY 
       VARY BETWEEN 0.06 AND 0.3 MICROSIEVERT PER HOUR. 
       (1 MICROSIEVERT = 0.000001 SIEVERT = 0.001 MILLISIEVERT)
 
2.     TEMPORAL VARIATIONS ARE GENERALLY CAUSED BY CHANGES IN
       METEOROLOGICAL CONDITIONS SUCH AS RAINFALL, WIND AND 
       BAROMETRIC PRESSURE.
 
3.     SPATIAL VARIATIONS ARE GENERALLY CAUSED BY DIFFERENCES IN 
       THE RADIOACTIVE CONTENT OF LOCAL ROCK AND SOIL.
 
4.     THE DATA DISPLAYED IS PROVISIONAL. ONLY LIMITED DATA 
       VALIDATION HAS BEEN CARRIED OUT.

DISPATCHED BY HONG KONG OBSERVATORY AT 00:17 HKT ON 10.04.2021