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Saturday, May 19, 1973
The weather remained cloudy with light rain or drizzle patches
until April 14 when a warm and humid airstream arrived from the southeast.
Continuous fog or mist was reported around Waglan Island from the night of April 14 to the morning of April 16 and during this time the
lowest visibility recorded was 200 metres.
Elsewhere the weather was fine apart from morning mist or fog patches. Late on April 17, winds freshened from the east again and conditions became
cloudy with light rain and showers. Isolated thunderstorms were also
reported on April 20.
On April 22, an active upper-air disturbance brought widespread thunderstorms to south China and at the Royal Observatory, 43.3 millimetres
of rain was recorded in 24 hours. The maximum instantaneous intensity of rainfall recorded at the King's Park Meteorological Station was 199 millimetres
per hour.
After this disturbance, the Pacific ridge began to extend
westwards to west China and the following five days were fine apart from morning mist or fog patches. The maximum temperature of the month, 31.3°C, occurred on April 26 and was the highest recorded so far this year.
On April 27, pressure rose over China and strong easterly winds blew for several hours in Hong Kong. The Strong Monsoon Signal was hoisted for the third time in the month. The weather improved towards the end of the
month with long sunny periods on April 30.
/Twenty-three .....