Yesterday's Weather and Radiation Level

Bulletin issued at 00:15 HKT 25/Apr/2019

HKO Readings & Radiation level

Yesterday's Weather and Radiation Level:
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Hong Kong Observatory
Maximum Air Temperature                     31.2 C
Minimum Air Temperature                     26.2 C
Grass Minimum Temperature                   24.2 C
Relative Humidity                        64 - 88 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January           417.6 mm
Against an average of                      304.1 mm

Other Stations                Min                  Max
King's Park                  25.2 C               30.7 C
Wong Chuk Hang               25.0 C               29.5 C
Ta Kwu Ling                  22.6 C               32.2 C
Lau Fau Shan                 24.7 C               31.6 C
Tai Po                       23.9 C               31.5 C
Sha Tin                      25.7 C               31.1 C
Tuen Mun                     24.8 C               31.7 C
Tseung Kwan O                24.2 C               31.7 C
Sai Kung                     25.0 C               32.2 C
Cheung Chau                  24.3 C               32.8 C
Chek Lap Kok                 26.3 C               31.7 C
Tsing Yi                     25.5 C               30.1 C
Shek Kong                    24.0 C               31.9 C
Tsuen Wan Ho Koon            24.7 C               29.5 C
Tsuen Wan Shing Mun Valley   25.5 C               29.8 C
Hong Kong Park               26.1 C               30.2 C
Shau Kei Wan                 25.6 C               30.4 C
Kowloon City                 25.1 C               31.8 C
Happy Valley                 26.1 C               30.9 C
Wong Tai Sin                 25.9 C               31.8 C
Stanley                      24.7 C               29.5 C
Kwun Tong                    25.5 C               30.8 C
Sham Shui Po                 25.3 C               30.3 C
Kai Tak Runway Park          25.3 C               31.5 C
Yuen Long Park               24.5 C               32.4 C
Tai Mei Tuk               24.5 C                      

Duration of sunshine (King's Park):              9.6 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 (24 Apr 2019) 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
                            (microsievert/hour)
Ping Chau                           0.08
Tap Mun                             0.08
Kat O                               0.10
Yuen Ng Fan                         0.12
Tai Mei Tuk                         0.11
Sha Tau Kok                         0.10
Kwun Tong                           0.12
Sai Wan Ho                          0.09
King's Park                         0.14
Tsim Bei Tsui                       0.13
Cape D'Aguilar                      0.13
Chek Lap Kok                        0.14   


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.