Saturday, May 19, 1973
ABNORMALLY WARM WEATHER CONTINUES
The abnormally warm weather during February and March continued
intą April and the mean temperature 24°C was the highest on record for
April.
The Royal Observatory said this figure had been equalled only
once before in April 1964.
The mean maximum temperature (26.8°C) and the mean minimum (21.8°c) were both the third highest on record for the month.
At the beginning of April, Hong Kong was in a southerly air-
stream and the weather was cloudy and warm,
Late on April 3, a cold front passed Hong Kong and scattered showers
were reported. Winds strengthened from the north and the Strong Monsoon
Signal was hoisted that evening and lowered the next morning.
The sky cleared rapidly after the cold front and the mean relative
humidity fell to 60 per cent on April 4 and 5 when a Red Fire Danger Warning
was issued.
However, the next two days were cloudy and some rain and isolated
thunderstorms were reported.
From April 7 to 11, a trough of low pressure remained almost stationary
along the south China coast and showers and isolated thunderstorms were
reported on each day throughout the entire period.
A hailstorm with hailstones as big as garden peas occurred over
the northwestern part of the New Territories on April 7. The following day
the southwest monsoon intensified over the South China Sea and the Strong Monsoon
Signal was hoisted for about nine hours.
The weather
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