PRH 7
H 香港政府 GIS 新聞處
DAILY INFORMATION BULLETIN
1975 AN EXCEPTIONAL YEAR WEATHERWISE
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1975 WAS AN EXCEPTIONALLY +WET+ YEAR. TOTAL RAINFALL AMOUNTED TO 3,028.7 MM. WHICH WAS NEARLY 40 PER CENT ABOVE NORMAL, THUS MAKING IT THE THIRD WETTEST YEAR SINCE RECORDS BEGAN IN 1884.
THERE WERE AT LEAST FIVE MONTHS IN WHICH RAINFALL FAR EXCEEDED THE NORMAL RECORD, AS MUCH AS OVER THREE TIMES IN ONE INSTANCE.
SEVERAL NEW RECORDS IN TEMPERATURES WERE ALSO SET IN THE YEAR. APRIL WAS EXCEPTIONALLY WARM WHILE NOVEMBER AND DECEMBER WERE ABNORMALLY COLD.
TWENTY-TWO TROPICAL CYCLONES WERE REPORTED IN THE WESTERN NORTH PACIFIC AND THE SOUTH CHINA SEA DURING THE YEAR. SEVEN AFFECTED HONG KONG AND NECESSITATED THE HOISTING OF TROPICAL CYCLONE WARNING SIGNALS. HURRICANE SIGNAL NO. 10 WAS HOISTED FOR THE FIRST TIME IN OCTOBER SINCE AUGUST 1971.
IN GENERAL, THE FIRST THREE MONTHS WERE MILD AND CLOUDY WITH TEMPERATURES ABOVE 10 DEGREES CELSIUS ALL THE TIME.
IT WAS THEN FOLLOWED BY AN ABNORMALLY WARM APRIL. THE MEAN TEMPERATURE OF 24.2. DEGREES CELSIUS AND THE MEAN MAXIMUM TEMPERATURE OF 27.3 DEGREES CELSIUS WERE BOTH THE HIGHEST ON RECORD FOR APRIL WHILE THE MEAN MINIMUM TEMPERATURE OF 21.8 DEGREES RANKED THIRD HIGHEST ON RECORD FOR THE MONTH.
RAINFALL TOTALLED 345 MM., MAKING THE MONTH THE FOURTH WETTEST APRIL ON RECORD.
MAY WAS WARMER BUT MUCH WETTER AND LESS SUNNY THAN USUAL. TOTAL RAINFALL FOR THE MONTH AMOUNTED TO 571.5 MM., WHICH WAS NEARLY DOUBLE THE NORMAL AMOUNT. HEAVY SHOWERS AND THUNDERSTORMS NECESSITATED THE ISSUE OF THUNDERSTORM AND HEAVY RAIN WARNINGS ON 19 DAYS.
JUNE WAS AN EXTREMELY WET MONTH WITH 579.6 MM. OF RAIN. THE VERY ACTIVE SOUTHWEST MONSOON CAUSED FREQUENT HEAVY SHOWERS AND THUNDERSTORMS. THUNDERSTORM AND HEAVY RAIN WARNINGS WERE ISSUED ON 14 DAYS.
JULY WAS THE FIRST MONTH SINCE FEBRUARY WITH BELOW AVERAGE RAINFALL. THE TOTAL AMOUNT WAS 292.4 MM.
AUGUST WAS WET AGAIN. FREQUENT SHOWERS AND THUNDERSTORMS BROUGHT 458.9 MM. OF RAIN, WHICH EXCEEDED THE AVERAGE BY 24 PER CENT.
Issued by Government Information Services, Beaconsfield House, Hong Kong. Tel: 5-233191
312 SEPTEMBER WAS