PRESS WEATHER NO. 004 - HKO READINGS & RADIATION LEVEL

******************************************************

HKO READINGS & RADIATION LEVEL

YESTERDAY'S WEATHER AND RADIATION LEVEL:
------------------------------------------------------
 
HONG KONG OBSERVATORY
MAXIMUM AIR TEMPERATURE                       23.9 C
MINIMUM AIR TEMPERATURE                       17.3 C
GRASS MINIMUM TEMPERATURE                     14.7 C
RELATIVE HUMIDITY                          57 - 83 PERCENT
RAINFALL                                         0 MM
TOTAL RAINFALL SINCE 1ST JANUARY             TRACE
AGAINST AN AVERAGE OF                         38.1 MM
 
OTHER STATIONS                MIN                  MAX
KING'S PARK                  16.5 C               23.4 C
WONG CHUK HANG               15.8 C               24.0 C
TA KWU LING                  15.5 C               26.6 C
LAU FAU SHAN                 15.1 C               22.3 C
TAI PO                       16.5 C               22.9 C
SHA TIN                      15.4 C               24.8 C
TUEN MUN                     15.3 C               23.3 C
TSEUNG KWAN O                16.0 C               23.2 C
SAI KUNG                     NO DATA             NO DATA
CHEUNG CHAU                  16.1 C               24.7 C
CHEK LAP KOK                 17.1 C               24.1 C
TSING YI                     16.9 C               25.5 C
SHEK KONG                    14.1 C               26.9 C
TSUEN WAN HO KOON            NO DATA             NO DATA
TSUEN WAN SHING MUN VALLEY   15.0 C               26.2 C
HONG KONG PARK               16.8 C               23.4 C
SHAU KEI WAN                 16.6 C               22.5 C
KOWLOON CITY                 16.4 C               25.4 C
HAPPY VALLEY                 16.1 C               25.0 C
WONG TAI SIN                 17.0 C               24.9 C
STANLEY                      16.9 C               22.0 C
KWUN TONG                    16.2 C               22.9 C
SHAM SHUI PO                 17.0 C               25.5 C
KAI TAK RUNWAY PARK          17.2 C               22.0 C
YUEN LONG PARK               15.6 C               26.3 C
TAI MEI TUK                  15.6 C               26.2 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 6.
SEA SURFACE TEMPERATURE (WAGLAN ISLAND):     NO DATA
 
YESTERDAY'S (5 FEB 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 06.02.2021