Yesterday's Weather and Radiation Level

Bulletin issued at 00:15 HKT 22/Nov/2019

HKO Readings & Radiation level

Yesterday's Weather and Radiation Level:
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Hong Kong Observatory
Maximum Air Temperature                     25.2 C
Minimum Air Temperature                     19.2 C
Grass Minimum Temperature                   17.0 C
Relative Humidity                        49 - 78 Percent
Rainfall                                      Trace 
Total rainfall since 1st January          2382.7 mm
Against an average of                     2364.2 mm

Other Stations                Min                  Max
King's Park                  18.6 C               25.3 C
Wong Chuk Hang               17.3 C               24.6 C
Ta Kwu Ling                  13.1 C               26.0 C
Lau Fau Shan                 16.2 C               25.2 C
Tai Po                       16.6 C               25.4 C
Sha Tin                      16.6 C               25.5 C
Tuen Mun                     17.4 C               25.9 C
Tseung Kwan O                16.8 C               25.8 C
Sai Kung                     18.4 C               23.9 C
Cheung Chau                  17.8 C               27.4 C
Chek Lap Kok                 19.0 C               25.4 C
Tsing Yi                     17.6 C               26.0 C
Shek Kong                    14.8 C               26.2 C
Tsuen Wan Ho Koon            15.4 C               24.8 C
Tsuen Wan Shing Mun Valley   16.7 C               27.0 C
Hong Kong Park               19.1 C               26.2 C
Shau Kei Wan                 18.0 C               25.0 C
Kowloon City                 18.1 C               27.3 C
Happy Valley                 17.6 C               26.7 C
Wong Tai Sin                 18.2 C               27.2 C
Stanley                      19.2 C               24.6 C
Kwun Tong                    18.1 C               26.1 C
Sham Shui Po                 17.6 C               27.2 C
Kai Tak Runway Park          19.4 C               25.4 C
Yuen Long Park               15.1 C               27.5 C
Tai Mei Tuk               15.1 C                      

Duration of sunshine (King's Park):              10.0 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.

Yesterday's (21 Nov 2019) 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                           0.09
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                           0.13
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.