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WEATHER FOR MAY
Saturday, June 24, 1972
May 1972 was much wetter than normal. During the month there
were only four days on which no rainfall was recorded at the Royal
Observatory.
The month's total rainfall of 654.5 mm was more than twice the
normal value for May.
On May 1, a trough of low pressure lay from west to east across
the south China coast and unsettled weather with occasional showers and
scattered thunderstorms affected the Colony during the first 3 days of
the month.
The trough weakened late on May 3 and the weather improved with
sunny intervals during the next two days.
From May 6 onwards, several troughs formed and affected south
China and the northern part of the South China Sea; and conditions were
often unsettled with occasional heavy showers and widespread thunderstorms.
On May 10 and 11, a trough near the south China coast became very
Enhanced by the passage of an upper-air disturbance, it gave rise
to heavy squally showers and violent thunderstorms over the Colony.
active.
During these two days a total of 325 mm of rainfall was recorded
at the Royal Observatory, and this accounted for about half the total
rainfall for the month.
The heavy downpour on May 10 and 11 caused landslides, widespread
flooding and disruption to traffic on a number of roads.
/Early
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