HKO READINGS & RADIATION LEVEL

YESTERDAY'S WEATHER AND RADIATION LEVEL:
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HONG KONG OBSERVATORY
MAXIMUM AIR TEMPERATURE                       25.6 C
MINIMUM AIR TEMPERATURE                       22.3 C
GRASS MINIMUM TEMPERATURE                     20.1 C
RELATIVE HUMIDITY                          50 - 84 PERCENT
RAINFALL                                     TRACE
TOTAL RAINFALL SINCE 1ST JANUARY              86.9 MM
AGAINST AN AVERAGE OF                        229.1 MM
 
OTHER STATIONS                MIN                  MAX
KING'S PARK                  21.6 C               25.3 C
WONG CHUK HANG               22.5 C               25.6 C
TA KWU LING                  21.5 C               27.6 C
LAU FAU SHAN                 21.7 C               28.1 C
TAI PO                       21.0 C               24.6 C
SHA TIN                      21.5 C               26.1 C
TUEN MUN                     21.8 C               27.6 C
TSEUNG KWAN O                20.9 C               25.4 C
SAI KUNG                     21.5 C               24.7 C
CHEUNG CHAU                  21.9 C               25.9 C
CHEK LAP KOK                 22.7 C               27.1 C
TSING YI                     22.3 C               27.3 C
SHEK KONG                    22.1 C               27.6 C
TSUEN WAN HO KOON            19.7 C               25.5 C
TSUEN WAN SHING MUN VALLEY   21.3 C               25.9 C
HONG KONG PARK               NO DATA             NO DATA
SHAU KEI WAN                 21.7 C               24.8 C
KOWLOON CITY                 21.5 C               25.7 C
HAPPY VALLEY                 22.2 C               25.7 C
WONG TAI SIN                 21.8 C               25.1 C
STANLEY                      22.2 C               24.4 C
KWUN TONG                    21.1 C               24.5 C
SHAM SHUI PO                 22.2 C               27.8 C
KAI TAK RUNWAY PARK          22.2 C               24.3 C
YUEN LONG PARK               22.1 C               27.9 C
TAI MEI TUK                  21.3 C               27.8 C
 
DURATION OF SUNSHINE (KING'S PARK):              3.3 H
 
THE MEAN UV INDEX RECORDED AT KING'S PARK YESTERDAY WAS 3,
THE UV INTENSITY WAS MODERATE.
THE MAXIMUM UV INDEX FOR YESTERDAY WAS 9.
SEA SURFACE TEMPERATURE (WAGLAN ISLAND):     NO DATA
 
YESTERDAY'S (18 APR 2021) 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
                            (MICROSIEVERT/HOUR)
PING CHAU                           0.09
TAP MUN                             0.09
KAT O                               0.11
YUEN NG FAN                         0.12
TAI MEI TUK                         0.11
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 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 00:15 HKT ON 19.04.2021