Saturday, April 28, 1973
A surge of the winter monsoon reached Hong Kong during the early
hours of March 15 and brought some light rain.
Temperatures fell to a minimum of 15.7°C around dawn as winds
freshoned from the north.
The relative humidity also fell during the next few days to a
mean of 61 per cent on March 18. Yellow fire warnings were issued on
March 18 and 19. A ridge of high pressure persisted and there were sunny
intervals on March 19 and 20.
On March 21, a weak cold front passed through Hong Kong. Although
there were a few light rain patches that evening, rapid improvement
occurred the following morning and mainly fine weather prevailed on March 22
and 23.
A trough of low pressure passed Hong Kong late on March 24. A
total of 11.6 mm of rainfall was recorded during the night.
However weather improved steadily and on March 26, it became fine
and dry with a mean relative humidity of 65 per cent. Yellow fire warnings
were issued on March 26 and 27.
Another warm and moist airstream from the southeast reached Hong
Kong late on March 27 and 28 and coastal fog on March 28 and 29.
As a ridge of high pressure over southeast China strengthened
during the last three days of the month, weather became fine and hot and
temperatures rose to a new record maximum of 30.1°C on March 31.
/A total