4
Wednesday, March 21, 1973
On February 19, an anticyclone over China intensified and caused a
cold front to move south through Hong Kong.
Temperatures fell to a minimum of 14.3°C as winds strengthened from
the east and there were patches of rain during the late hours of February 19.
The Strong Monsoon Signal was hoisted between 1.15 a.m. and 10.15 a.m.
on February 20.
For the next five days, a succession of disturbances in the upper
westerly air flow affected the south China coast and brought 18.4 mm of rain,
practically all of the month's measurable rainfall.
From February 21 to 23 a warm and moist southeasterly airstream
affected Hong Kong and resulted in low visibility and widespread coastal fog.
This mild and humid weather continued until the end of the month.
Seventeen aircraft were diverted from Kai Tak due to low runway visibility
during the month.
No thunderstorm or heavy rain warnings and no fire danger warnings
were issued last month.
Sunshine
Rainfall
The month's figures and departures from normal were:
Cloudiness
109.1 hours;
21.7
71 per cent;
8.9 hours above normal
25.2 mm below normal
4 per cent below normal
Relative Humidity
84 per cent;
5 per cent above normal
Mean Maximum Temperature
22.1°c
}
4.4°C above normal
Mean Temperature
19.2°c
4.0°C above normal
Mean Minimum Temperature
17.1°c
}
3.9°C above normal
Mean Dew Point
16.3°C
;
4.6°C above normal
Total Evaporation
83.2 mm
10.0 mm below normal
Maximum Temperature of 27.8°C was recorded on February 27.
Minimum Temperature of 14.3°C was recorded on February 20.
15