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Yesterday's Weather and Radiation Level

Bulletin issued at 00:15 HKT 21/Feb/2018

HKO Readings & Radiation level

Yesterday's Weather and Radiation Level:

Hong Kong Observatory
Maximum Air Temperature                     25.0 C
Minimum Air Temperature                     18.8 C
Grass Minimum Temperature                   18.0 C
Relative Humidity                        75 - 92 Percent
Rainfall                                      Trace 
Total rainfall since 1st January            62.2 mm
Against an average of                       64.3 mm

Other Stations                Min                  Max
King's Park                  18.2 C               26.3 C
Wong Chuk Hang               18.1 C               24.5 C
Ta Kwu Ling                  17.1 C               27.7 C
Lau Fau Shan                 18.4 C               23.2 C
Tai Po                       17.9 C               24.4 C
Tuen Mun                     19.5 C               26.5 C
Tseung Kwan O                17.4 C               24.8 C
Sai Kung                     17.7 C               22.7 C
Cheung Chau                  18.4 C               23.1 C
Chek Lap Kok                 19.3 C               25.4 C
Tsing Yi                     19.0 C               25.3 C
Shek Kong                    18.3 C               27.1 C
Tsuen Wan Ho Koon            18.3 C               24.8 C
Tsuen Wan Shing Mun Valley   18.3 C               26.6 C
Hong Kong Park               18.7 C               24.2 C
Shau Kei Wan                 17.1 C               24.2 C
Kowloon City                 18.6 C               25.9 C
Happy Valley                 18.4 C               26.0 C
Wong Tai Sin                 19.1 C               26.5 C
Stanley                      17.5 C               22.3 C
Kwun Tong                    18.1 C               25.6 C
Sham Shui Po                 19.6 C               25.1 C
Kai Tak Runway Park          17.8 C               21.4 C
Yuen Long Park               19.0 C               26.8 C
Tai Mei Tuk               19.0 C                      

Duration of sunshine (King's Park):              1.5 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):        17.1 C
Yesterday's (20 Feb 2018) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.08 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
Ping Chau                           0.08
Tap Mun                             0.09
Kat O                               0.11
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                         0.15
Tsim Bei Tsui                       0.13
Cape D'Aguilar                      0.13
Chek Lap Kok                        0.15   

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.

Yesterday's Radiation Level Yesterday's Radiation Level
Climatological Information for 20 Feb Climatological Information for 20 February
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