HKO READINGS & RADIATION LEVEL

YESTERDAY'S WEATHER AND RADIATION LEVEL:
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HONG KONG OBSERVATORY
MAXIMUM AIR TEMPERATURE                       30.3 C
MINIMUM AIR TEMPERATURE                       22.2 C
GRASS MINIMUM TEMPERATURE                     20.2 C
RELATIVE HUMIDITY                          51 - 86 PERCENT
RAINFALL                                         0 MM
TOTAL RAINFALL SINCE 1ST JANUARY             213.7 MM
AGAINST AN AVERAGE OF                        336.1 MM
 
OTHER STATIONS                MIN                  MAX
KING'S PARK                  21.0 C               29.3 C
WONG CHUK HANG               18.5 C               28.3 C
TA KWU LING                  18.0 C               30.5 C
LAU FAU SHAN                 19.7 C               30.2 C
TAI PO                       19.2 C               27.7 C
SHA TIN                      18.8 C               29.5 C
TUEN MUN                     20.0 C               29.0 C
TSEUNG KWAN O                18.7 C               29.9 C
SAI KUNG                     19.7 C               27.5 C
CHEUNG CHAU                  19.4 C               28.4 C
CHEK LAP KOK                 21.8 C               29.5 C
TSING YI                     20.0 C               29.0 C
SHEK KONG                    18.3 C               31.2 C
TSUEN WAN HO KOON            18.2 C               28.5 C
TSUEN WAN SHING MUN VALLEY   18.2 C               29.6 C
HONG KONG PARK               20.5 C               29.4 C
SHAU KEI WAN                 20.5 C               27.5 C
KOWLOON CITY                 20.7 C               30.3 C
HAPPY VALLEY                 19.7 C               30.1 C
WONG TAI SIN                 20.1 C               29.8 C
STANLEY                      20.9 C               27.8 C
KWUN TONG                    20.9 C               29.6 C
SHAM SHUI PO                 21.0 C               29.9 C
KAI TAK RUNWAY PARK          21.5 C               26.4 C
YUEN LONG PARK               19.2 C               31.2 C
TAI MEI TUK                  20.3 C               30.8 C
 
DURATION OF SUNSHINE (KING'S PARK):             10.3 H
 
THE MEAN UV INDEX RECORDED AT KING'S PARK YESTERDAY WAS 5,
THE UV INTENSITY WAS MODERATE.
THE MAXIMUM UV INDEX FOR YESTERDAY WAS 9.
SEA SURFACE TEMPERATURE (WAGLAN ISLAND):     NO DATA
 
YESTERDAY'S (30 APR 2020) 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 00:27 HKT ON 01.05.2020