4
Monday, July 16, 1973
On June 16, the trough moved northwards and weakened. Winds
over Hong Kong turned to south or southwest.
Shower activity decreased
as the trough dissipated near the south China coast and a new one formed over
central China.
The warm and humid air from the southwest gave rise to another hot spell and the maximum temperature of the month, 33.1°C was recorded
on June 20,
On June 25, the trough over central China started to move south
and reached the south China coast the next day. The weather in Hong Kong
deteriorated and 128.9 mm of rainfall were recorded at the Royal Observatory
on June 27.
However the trough soon retreated to the north and dissipated over
south China on June 29. It was mainly fine on the last day of the month.
Six aircraft were diverted due to adverse weather conditions
during the month.
Thunderstorms or heavy rain warnings were issued on 10 occasions
during the month.
Sunshine
Rainfall
The month's figures and departures from normal were:-
Cloudiness
Relative Humidity
138.9 hours; 21.0 hours below normal
373.7 mm
27.5 mm below normal
80%
2% above normal
87%
;
3% above normal
Mean Haximum Temperature
30.0°C
;
0.2°C above normal
27.5°c
;
0.2°C above normal
25.7°C
;
0.3°C above normal
25.0°
;
0.8°C above normal
Mean Temperature
Mean Minimum Temperature
Mean Dew Point
Total Evaporation
130.6 mm ; 28.8 mm below normal
Haximum Temperature of 33.1°C was recorded on June 20. Minimum Temperature of 22.8°C was recorded on June 8.
15