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Bulletin updated at 00:16 HKT
21/ Aug /2008

Yesterday's Weather And Radiation Level

HONG KONG OBSERVATORY:
MAXIMUM AIR TEMPERATURE: 32.3 C
MINIMUM AIR TEMPERATURE: 27.0 C
GRASS MINIMUM TEMPERATURE: 25.5 C
RELATIVE HUMIDITY: 57 - 86 PERCENT
RAINFALL: 0 MM

TOTAL RAINFALL SINCE 1ST JANUARY: 2600.6 MM
AGAINST AN AVERAGE OF 1712.9 MM

OTHER STATIONS
MIN
MAX
KING'S PARK
26.6 C
32.9 C
WONG CHUK HANG
25.9 C
33.6 C
TA KWU LING
24.0 C
34.0 C
LAU FAU SHAN
26.3 C
33.0 C
TAI PO
26.2 C
34.2 C
SHA TIN
25.8 C
35.1 C
TUEN MUN
26.7 C
35.1 C
TSEUNG KWAN O
24.6 C
34.1 C
SAI KUNG
26.9 C
34.4 C
CHEUNG CHAU
25.6 C
34.2 C
CHEK LAP KOK
26.7 C
34.8 C
TSING YI
27.0 C
32.5 C
SHEK KONG
24.7 C
34.3 C
TSUEN WAN
24.9 C
33.8 C
HONG KONG PARK
26.1 C
33.5 C
SHAU KEI WAN
27.3 C
34.0 C
KOWLOON CITY
26.2 C
35.3 C

DURATION OF SUNSHINE (KING'S PARK): 11.0 H
THE MEAN UV INDEX RECORDED AT KING'S PARK YESTERDAY WAS 5,
THE UV INTENSITY WAS MODERATE THE MAXIMUM UV INDEX FOR YESTERDAY WAS 11.

YESTERDAY'S ( 20 AUG ) 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
KING'S PARK
0.14
PING CHAU
0.09
TAP MUN
0.08
KAT O
0.10
YUEN NG FAN
0.12
TAI MEI TUK
0.12
SHA TAU KOK
0.10
KWUN TONG
0.13
SAI WAN HO
0.10
TSIM BEI TSUI
0.13

NOTE
  1. FROM READINGS TAKEN AT VARIOUS LOCATIONS IN HONG KONG DURING THE PERIOD 1987-1993, THE BACKGROUND AMBIENT GAMMA RADIATION LEVELS MAY VARY BETWEEN 0.06 AND 0.3 MICROSIEVERT PER HOUR.
  2. 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.
  3. FOR EXAMPLE, IF AMBIENT GAMMA RADIATION IS THE ONLY FACTOR CONTRIBUTING TO THE RADIATION DOSE TO A PERSON, THIS DOSE OF 5000 MICROSIEVERTS MAY BE REACHED WHEN THE AMBIENT GAMMADOSE RATE IS 1000 MICROSIEVERTS PER HOUR (MORE THAN 3000 TIMES ABOVE BACKGROUND) AND LASTS FOR 5 HOURS; OR WHEN THE DOSE RATE IS 200 MICROSIEVERTS PER HOUR (MORE THAN 600 TIMES ABOVE BACKGROUND) AND LASTS FOR 25 HOURS.
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