Yesterday's Weather and Radiation Level

Bulletin issued at 00:15 HKT 27/Jan/2020

HKO Readings & Radiation level

Yesterday's Weather and Radiation Level:
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Hong Kong Observatory
Maximum Air Temperature                     19.2 C
Minimum Air Temperature                     13.7 C
Grass Minimum Temperature                   13.2 C
Relative Humidity                        75 - 96 Percent
Rainfall                                    12.3 mm 
Total rainfall since 1st January            14.5 mm
Against an average of                       21.3 mm

Other Stations                Min                  Max
King's Park                  12.8 C               19.5 C
Wong Chuk Hang               13.4 C               19.6 C
Ta Kwu Ling                  12.2 C               17.8 C
Lau Fau Shan                 12.5 C               17.4 C
Tai Po                       12.7 C               17.6 C
Sha Tin                      13.1 C               18.7 C
Tuen Mun                     12.6 C               18.1 C
Tseung Kwan O                12.6 C               19.3 C
Sai Kung                     13.3 C               18.5 C
Cheung Chau                  12.1 C               18.3 C
Chek Lap Kok                 12.9 C               18.9 C
Tsing Yi                     13.2 C               19.1 C
Shek Kong                    13.1 C               18.7 C
Tsuen Wan Ho Koon            11.5 C               17.8 C
Tsuen Wan Shing Mun Valley   11.7 C               20.4 C
Hong Kong Park               13.5 C               20.1 C
Shau Kei Wan                 13.2 C               19.9 C
Kowloon City                 12.3 C               19.6 C
Happy Valley                 13.7 C               19.9 C
Wong Tai Sin                 13.0 C               20.0 C
Stanley                      13.3 C               20.4 C
Kwun Tong                    12.2 C               20.1 C
Sham Shui Po                 13.1 C               19.5 C
Kai Tak Runway Park          13.4 C               20.4 C
Yuen Long Park               12.7 C               18.3 C
Tai Mei Tuk               12.7 C                      

Duration of sunshine (King's Park):              1.5 H
The mean UV index recorded at King's Park yesterday was 1,
the UV intensity was LOW.
The maximum UV index for yesterday was 5.

Yesterday's (26 Jan 2020) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.10 to
0.16 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                           0.11
Tap Mun                             0.10
Kat O                               0.12
Yuen Ng Fan                         0.13
Tai Mei Tuk                         0.13
Sha Tau Kok                         0.11
Kwun Tong                           0.13
Sai Wan Ho                          0.10
King's Park                         0.15
Tsim Bei Tsui                       0.15
Cape D'Aguilar                      0.14
Chek Lap Kok                        0.16   


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.