PRESS WEATHER NO. 006 - HKO READINGS & RADIATION LEVEL
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HKO READINGS & RADIATION LEVEL
DISPATCHED BY HONG KONG OBSERVATORY AT 00:29 HKT ON 23.09.2017
YESTERDAY'S WEATHER AND RADIATION LEVEL:
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HONG KONG OBSERVATORY
MAXIMUM AIR TEMPERATURE 32.0 C
MINIMUM AIR TEMPERATURE 26.1 C
GRASS MINIMUM TEMPERATURE 25.1 C
RELATIVE HUMIDITY 74 - 96 PERCENT
RAINFALL 17.9 MM
TOTAL RAINFALL SINCE 1ST JANUARY 2366.8 MM
AGAINST AN AVERAGE OF 2172.2 MM
OTHER STATIONS MIN MAX
KING'S PARK 25.3 C 31.5 C
WONG CHUK HANG 26.5 C 32.1 C
TA KWU LING 25.0 C 32.3 C
LAU FAU SHAN 25.5 C 32.7 C
TAI PO 25.3 C 30.6 C
SHA TIN 25.6 C 32.0 C
TUEN MUN 25.5 C 31.8 C
TSEUNG KWAN O 25.3 C 31.6 C
SAI KUNG 25.7 C 30.3 C
CHEUNG CHAU 25.1 C 31.1 C
CHEK LAP KOK 25.4 C 33.1 C
TSING YI 25.7 C 32.5 C
SHEK KONG 25.4 C 32.6 C
TSUEN WAN HO KOON 25.0 C 30.4 C
TSUEN WAN SHING MUN VALLEY 25.0 C 31.1 C
HONG KONG PARK 25.4 C 30.9 C
SHAU KEI WAN 25.2 C 30.8 C
KOWLOON CITY 24.9 C 32.6 C
HAPPY VALLEY 26.5 C 31.8 C
WONG TAI SIN 25.3 C 31.8 C
STANLEY 26.1 C 31.0 C
KWUN TONG 24.9 C 31.0 C
SHAM SHUI PO 25.5 C 32.8 C
KAI TAK RUNWAY PARK 26.2 C 30.7 C
YUEN LONG PARK 26.1 C 33.0 C
TAI MEI TUK 26.4 C 30.3 C
DURATION OF SUNSHINE (KING'S PARK): 6.9 H
THE MEAN UV INDEX RECORDED AT KING'S PARK YESTERDAY WAS 4,
THE UV INTENSITY WAS MODERATE.
THE MAXIMUM UV INDEX FOR YESTERDAY WAS 11.
SEA SURFACE TEMPERATURE (WAGLAN ISLAND): 29.4 C
YESTERDAY'S (22 SEP 2017) AVERAGE AMBIENT GAMMA RADIATION
DOSE RATE TAKEN OUTDOORS IN HONG KONG RANGED FROM 0.08 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 0.08
TAP MUN 0.08
KAT O 0.08
YUEN NG FAN 0.11
TAI MEI TUK 0.12
SHA TAU KOK 0.10
KWUN TONG 0.11
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 DURING
THE PERIOD 1987-2016, 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 00:29 HKT ON 23.09.2017
Ends/Saturday, September 23, 2017
Issued at HKT 0:29
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