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SUNDAY, JANUARY 11, 1987
ALTHOUGH WINDS MODERATED AROUND MIDDAY, IT REMAINED COLD OVERNIGHT ON DECEMBER 19.
THE WEATHER WARMED UP RAPIDLY DURING THE NEXT FEW DAYS WITH A MEAN TEMPERATURE OF 19.7 DEGREES CELSIUS ON DECEMBER 25, THE WARMEST CHRISTMAS IN 10 YEARS.
ALTHOUGH BOXING DAY WAS SLIGHTLY COOLER WITH WIND AND RAIN, THE WEATHER RAPIDLY IMPROVED WITH PLENTY OF SUNSHINE OVER THE NEXT TWO DAYS, FOLLOWED BY A WARM AND BALMY PERIOD UNTIL THE NEW YEAR.
FOUR TROPICAL CYCLONES DEVELOPED OVER THE WESTERN NORTH PACIFIC AND THE SOUTH CHINA SEA DURING THE MONTH,
NO AIRCRAFT WERE DIVERTED FROM HONG KONG DUE TO ADVERSE WEATHER IN DECEMBER.
THE RED FIRE DANGER WARNING WAS PUT UP ON DECEMBER 4, 19, 20,21 AND 28,
THE YELLOW FIRE DANGER WARNING WAS IN EFFECT ON DECEMBER 14, 22, 23, 24, 25, 26 AND 28.
SIGNALS HOISTED DURING THE MONTH WERE AS FOLLWS:
21,
WEATHER SYSTEM
SIGNAL
DATE AND TIME OF HOISTING
DATE AND TIME OF LOWERING
WINTER MONSOON STRONG MONSOON
WINTER MONSOON
STRONG MONSOON
WINTER MONSOON
STRONG MONSOON
DEC 15 11.15 AM
DEC 18 5.45 PM
DEC 26 2.15 AM
DEC 16 10.00 AM
DEC 19 10.00 AM
DEC 26 4.15 PM
THE MONTH'S FIGURES AND DEPARTURES FROM NORMAL WERE
SUNSHINE
RAINFALL
CLOUD INESS
RELATIVE HUMIDITY
MEAN MAXIMUM TEMPERATURE MEAN TEMPERATURE
MEAN MINIMUM TEMPERATURE MEAN DEW POINT TOTAL EVAPORATION
178.1 HOURS - 1.2 HOURS BELOW NORMAL
46.6 MM - 21.3 MM ABOVE NORMAL
50% - 2 % LESS THAN NORMAL
75%
20.0 DEGREES C
17.7 DEGREES -
C
12.9 DEGREES C
6% HIGHER THAN NORMAL
0.8 DEGREE C BELOW NORMAL NORMAL
15.8 DEGREES C - 0.6 DEGREE C ABOVE NORMAL 1.5 DEGREES C ABOVE NORMAL - 40.6 MM BELOW NORMAL
17.3 MM
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