PRESS WEATHER NO. 006 - HKO READINGS & RADIATION LEVEL
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HKO READINGS & RADIATION LEVEL
DISPATCHED BY HONG KONG OBSERVATORY AT 00:26 HKT ON 31.01.2023
YESTERDAY'S WEATHER AND RADIATION LEVEL:
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HONG KONG OBSERVATORY
MAXIMUM AIR TEMPERATURE 18.8 C
MINIMUM AIR TEMPERATURE 11.7 C
GRASS MINIMUM TEMPERATURE 8.2 C
RELATIVE HUMIDITY 23 - 69 PERCENT
RAINFALL 0 MM
TOTAL RAINFALL SINCE 1ST JANUARY 18.2 MM
AGAINST AN AVERAGE OF 32.4 MM
OTHER STATIONS MIN MAX
KING'S PARK 10.6 C 19.3 C
WONG CHUK HANG 8.1 C 20.0 C
TA KWU LING 1.6 C 21.9 C
LAU FAU SHAN 7.7 C 19.6 C
TAI PO 7.4 C 19.6 C
SHA TIN 5.8 C 19.9 C
TUEN MUN 9.9 C 21.2 C
TSEUNG KWAN O 7.7 C 19.7 C
SAI KUNG 9.6 C 17.7 C
CHEUNG CHAU 8.8 C 20.1 C
CHEK LAP KOK 10.0 C 19.0 C
TSING YI 9.2 C 21.0 C
SHEK KONG 4.6 C 21.8 C
TSUEN WAN HO KOON 7.6 C 21.1 C
TSUEN WAN SHING MUN VALLEY 6.5 C 22.1 C
HONG KONG PARK 10.4 C 18.6 C
SHAU KEI WAN 11.0 C 18.5 C
KOWLOON CITY 10.6 C 21.2 C
HAPPY VALLEY 8.2 C 19.6 C
WONG TAI SIN 8.9 C 19.9 C
STANLEY 11.4 C 17.6 C
KWUN TONG 10.2 C 18.4 C
SHAM SHUI PO 9.2 C 21.1 C
KAI TAK RUNWAY PARK 11.4 C 18.6 C
YUEN LONG PARK 5.1 C 22.1 C
TAI MEI TUK 9.1 C 21.5 C
DURATION OF SUNSHINE (KING'S PARK): 10.1 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 (30 JAN 2023) AVERAGE AMBIENT GAMMA RADIATION
DOSE RATE TAKEN OUTDOORS IN HONG KONG RANGED FROM 0.09 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 0.10
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 0.09
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 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 00:26 HKT ON 31.01.2023
Ends/Tuesday, January 31, 2023
Issued at HKT 0:26
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