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Bulletin updated at 00:15 HKT
04/ Jul /2009

Yesterday's Weather And Radiation Level

HONG KONG OBSERVATORY:
MAXIMUM AIR TEMPERATURE: 30.8 C
MINIMUM AIR TEMPERATURE: 28.6 C
GRASS MINIMUM TEMPERATURE: 26.6 C
RELATIVE HUMIDITY: 71 - 79 PERCENT
RAINFALL: 0.5 MM

TOTAL RAINFALL SINCE 1ST JANUARY: 818.0 MM
AGAINST AN AVERAGE OF 1089.3 MM

OTHER STATIONS
MIN
MAX
KING'S PARK
28.2 C
31.3 C
WONG CHUK HANG
26.7 C
30.1 C
TA KWU LING
26.5 C
33.1 C
LAU FAU SHAN
27.3 C
31.9 C
TAI PO
26.2 C
31.3 C
SHA TIN
28.4 C
31.3 C
TUEN MUN
28.9 C
31.8 C
TSEUNG KWAN O
27.9 C
31.1 C
SAI KUNG
28.4 C
31.7 C
CHEUNG CHAU
26.8 C
31.5 C
CHEK LAP KOK
28.5 C
32.9 C
TSING YI
27.5 C
30.8 C
SHEK KONG
27.1 C
32.6 C
TSUEN WAN
26.3 C
30.2 C
HONG KONG PARK
26.1 C
31.1 C
SHAU KEI WAN
27.2 C
30.5 C
KOWLOON CITY
27.5 C
31.5 C
HAPPY VALLEY
27.0 C
30.5 C
WONG TAI SIN
28.5 C
32.4 C
STANLEY
25.9 C
29.7 C

DURATION OF SUNSHINE (KING'S PARK): 2.5 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 ) : 26.2 C

YESTERDAY'S ( 3 JUL ) 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
0.09
KWUN TONG
0.13
SAI WAN HO
0.09
TSIM BEI TSUI
0.13

NOTE
  1. FROM READINGS TAKEN AT VARIOUS LOCATIONS IN HONG KONG DURING THE PERIOD 1987-2007, 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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