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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 29.7 C
MINIMUM AIR TEMPERATURE 25.0 C
GRASS MINIMUM TEMPERATURE 27.1 C
RELATIVE HUMIDITY 73 - 91 PERCENT
RAINFALL 8.1 MM
TOTAL RAINFALL SINCE 1ST JANUARY 1896.3 MM
AGAINST AN AVERAGE OF 2234.1 MM
 
OTHER STATIONS MIN MAX
KING'S PARK 23.7 C 28.6 C
WONG CHUK HANG NO DATA NO DATA
TA KWU LING 26.3 C 32.8 C
LAU FAU SHAN 24.1 C 31.2 C
TAI PO 24.5 C 30.9 C
SHA TIN 24.8 C 31.4 C
TUEN MUN 24.0 C 29.7 C
TSEUNG KWAN O 23.6 C 28.4 C
SAI KUNG 24.2 C 29.3 C
CHEUNG CHAU 22.6 C 27.2 C
CHEK LAP KOK 25.2 C 31.4 C
TSING YI 24.4 C 31.1 C
SHEK KONG 24.5 C 31.8 C
TSUEN WAN HO KOON 23.2 C 29.7 C
TSUEN WAN SHING MUN VALLEY 23.5 C 30.9 C
HONG KONG PARK 23.9 C 28.0 C
SHAU KEI WAN 23.4 C 28.0 C
KOWLOON CITY 23.5 C 28.8 C
HAPPY VALLEY 24.9 C 30.0 C
WONG TAI SIN 24.5 C 29.1 C
STANLEY 23.9 C 28.6 C
KWUN TONG 23.6 C 28.6 C
SHAM SHUI PO 24.4 C 31.6 C
KAI TAK RUNWAY PARK 24.1 C 29.4 C
YUEN LONG PARK 24.9 C 33.1 C
TAI MEI TUK 26.3 C 30.5 C
 
DURATION OF SUNSHINE (KING'S PARK): 2.9 H
 
THE MEAN UV INDEX RECORDED AT KING'S PARK YESTERDAY WAS 2,
THE UV INTENSITY WAS LOW.
THE MAXIMUM UV INDEX FOR YESTERDAY WAS 6.
SEA SURFACE TEMPERATURE (WAGLAN ISLAND): NO DATA
 
YESTERDAY'S (29 SEP 2022) 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 0.10
TAP MUN 0.08
KAT O 0.10
YUEN NG FAN 0.12
TAI MEI TUK 0.11
SHA TAU KOK 0.09
KWUN TONG 0.12
SAI WAN HO 0.09
KING'S PARK 0.13
TSIM BEI TSUI 0.12
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.
 
5. THE RANGE OF RELATIVE HUMIDITY IN THE DAILY WEATHER SUMMARY
ORIGINATES FROM THE OBSERVER'S REPORTS OF HOURLY READINGS
OF THE DAY. THIS FOLLOWS THE LONG-TERM PRACTICE OF COLLECTING
CLIMATOLOGICAL DATA OF THE HONG KONG OBSERVATORY FOR OVER A
CENTURY. IT MAY DIFFER FROM THE RELATIVE HUMIDITY RANGE
DERIVED FROM THE 1-MINUTE REPORTS OF THE AUTOMATIC WEATHER
STATION.


DISPATCHED BY HONG KONG OBSERVATORY AT 00:17 HKT ON 30.09.2022

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