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PRESS WEATHER NO. 006 - HKO READINGS & RADIATION LEVEL
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HKO READINGS & RADIATION LEVEL

YESTERDAY'S WEATHER AND RADIATION LEVEL:
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HONG KONG OBSERVATORY
MAXIMUM AIR TEMPERATURE 21.8 C
MINIMUM AIR TEMPERATURE 12.8 C
GRASS MINIMUM TEMPERATURE 13.4 C
RELATIVE HUMIDITY 47 - 77 PERCENT
RAINFALL 0 MM
TOTAL RAINFALL SINCE 1ST JANUARY 3026.8 MM
AGAINST AN AVERAGE OF 2391.5 MM
 
OTHER STATIONS MIN MAX
KING'S PARK 11.8 C 21.7 C
WONG CHUK HANG 12.5 C 21.3 C
TA KWU LING 10.4 C 19.3 C
LAU FAU SHAN 10.9 C 19.1 C
TAI PO 11.4 C 20.2 C
SHA TIN 11.2 C 20.5 C
TUEN MUN 11.8 C 19.4 C
TSEUNG KWAN O 11.8 C 20.7 C
SAI KUNG 11.8 C 22.0 C
CHEUNG CHAU 11.6 C 19.1 C
CHEK LAP KOK 12.2 C 19.4 C
TSING YI 12.4 C 21.6 C
SHEK KONG 11.2 C 20.4 C
TSUEN WAN HO KOON 10.0 C 19.7 C
TSUEN WAN SHING MUN VALLEY 11.7 C 21.2 C
HONG KONG PARK 12.9 C 21.7 C
SHAU KEI WAN 12.2 C 21.5 C
KOWLOON CITY 11.4 C 21.1 C
HAPPY VALLEY 13.0 C 22.1 C
WONG TAI SIN 12.0 C 21.1 C
STANLEY 13.0 C 22.4 C
KWUN TONG 12.1 C 21.0 C
SHAM SHUI PO 12.3 C 21.8 C
KAI TAK RUNWAY PARK 12.8 C 22.1 C
YUEN LONG PARK 11.4 C 19.7 C
 
DURATION OF SUNSHINE (KING'S PARK): 9.4 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): 20.9 C
 
YESTERDAY'S (27 DEC 2016) AVERAGE AMBIENT GAMMA RADIATION
DOSE RATE TAKEN OUTDOORS IN HONG KONG RANGED FROM 0.08 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 0.08
TAP MUN 0.09
KAT O 0.10
YUEN NG FAN 0.12
TAI MEI TUK 0.12
SHA TAU KOK 0.10
KWUN TONG 0.12
SAI WAN HO 0.10
KING'S PARK 0.14
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 DURING
THE PERIOD 1987-2015, THE BACKGROUND AMBIENT GAMMA RADIATION
LEVELS MAY VARY BETWEEN 0.06 AND 0.30 MICROSIEVERT PER HOUR.
 
2. THE EXTENT OF HEALTH EFFECTS TO A PERSON AS A RESULT OF
EXPOSURE TO RADIATION IS EXPRESSED BY A PHYSICAL QUANTITY
CALLED EQUIVALENT DOSE, IN UNIT OF SIEVERT. PROTECTIVE
ACTION MAY BE REQUIRED IF THERE IS AN INCREASE IN THE
AMBIENT GAMMA DOSE RATE ABOVE BACKGROUND SUCH THAT THE TOTAL
ADDITIONAL DOSE IS EXPECTED TO EXCEED 5000 MICROSIEVERTS IN
A RELATIVELY SHORT PERIOD OF TIME. FOR EXAMPLE, A DOSE OF
5000 MICROSIEVERTS MAY BE REACHED WHEN THE AMBIENT GAMMA
DOSE RATE IS 1000 MICROSIEVERTS PER HOUR (SEVERAL THOUSAND
TIMES ABOVE BACKGROUND) AND LASTS FOR 5 HOURS.
 
3. THE READINGS OF AMBIENT GAMMA RADIATION LEVEL FROM
INSTRUMENT ARE EXPRESSED IN UNIT OF GRAY, WHICH IS
NUMERICALLY EQUAL TO THE GAMMA DOSE EXPRESSED IN SIEVERT.

DISPATCHED BY HONG KONG OBSERVATORY AT 00:20 HKT ON 28.12.2016
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