HKO READINGS & RADIATION LEVEL

YESTERDAY'S WEATHER AND RADIATION LEVEL:
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HONG KONG OBSERVATORY
MAXIMUM AIR TEMPERATURE                       21.6 C
MINIMUM AIR TEMPERATURE                       16.0 C
GRASS MINIMUM TEMPERATURE                     12.1 C
RELATIVE HUMIDITY                          53 - 78 PERCENT
RAINFALL                                         0 MM
TOTAL RAINFALL SINCE 1ST JANUARY             TRACE
AGAINST AN AVERAGE OF                         24.7 MM
 
OTHER STATIONS                MIN                  MAX
KING'S PARK                  15.2 C               21.9 C
WONG CHUK HANG               15.5 C               22.0 C
TA KWU LING                  10.4 C               24.3 C
LAU FAU SHAN                 13.3 C               26.8 C
TAI PO                       12.9 C               21.0 C
SHA TIN                      12.5 C               22.5 C
TUEN MUN                     13.6 C               23.5 C
TSEUNG KWAN O                14.1 C               21.4 C
SAI KUNG                     12.9 C               20.4 C
CHEUNG CHAU                  14.6 C               23.3 C
CHEK LAP KOK                 16.3 C               24.9 C
TSING YI                     15.0 C               23.8 C
SHEK KONG                    12.9 C               24.4 C
TSUEN WAN HO KOON            13.3 C               24.0 C
TSUEN WAN SHING MUN VALLEY   14.7 C               24.2 C
HONG KONG PARK               14.5 C               22.6 C
SHAU KEI WAN                 15.1 C               20.4 C
KOWLOON CITY                 14.5 C               23.5 C
HAPPY VALLEY                 15.4 C               22.9 C
WONG TAI SIN                 15.0 C               22.9 C
STANLEY                      15.5 C               20.3 C
KWUN TONG                    14.8 C               21.5 C
SHAM SHUI PO                 14.8 C               24.0 C
KAI TAK RUNWAY PARK          15.8 C               21.2 C
YUEN LONG PARK               11.8 C               25.9 C
TAI MEI TUK                  13.5 C               24.7 C
 
DURATION OF SUNSHINE (KING'S PARK):             10.2 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 7.
SEA SURFACE TEMPERATURE (WAGLAN ISLAND):     NO DATA
 
YESTERDAY'S (31 JAN 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 00:17 HKT ON 01.02.2021