GN
5
WEDNESDAY, JANUARY 16, 1985
ON DECEMBER 4 THE CONTINENTAL ANTICYCLONE OVER CHINA BECAME ESTABLISHED AGAIN, FINE AND SUNNY WEATHER PREVAILED UP TO DECEMBER 16, APART FROM SOME CLOUDY PERIODS ON DECEMBER 12 AND 13 AND SOME LIGHT RAIN ON DECEMBER 14. THE TEMPERATURE ROSE TO A MAXIMUM OF 25.1 DEGREES CELSIUS ON DECEMBER 15, THE MONTH'S HIGHEST.
IT BECAME CLOUDY WITH LIGHT RAIN ON DECEMBER 17. A COLD FRONT PASSED HONG KONG EARLY ON DECEMBER 18, THE TEMPERATURE BEGAN TO FALL PROGRESSIVELY, CLOUDY WEATHER PERSISTED UP TO DECEMBER 23 AND THERE WAS A TRACE OF RAIN ON DECEMBER 19.
AFTER TWO SUNNY DAYS ON DECEMBER 24 AND 25, IT BECAME CLOUDY AGAIN BUT SLIGHTLY MILDER ON DECEMBER 26 AND 27. CLOUDY CONDITIONS PERSISTED UP TO DECEMBER 31.
A SURGE OF THE WINTER MONSOON ARRIVED ON DECEMBER 28 AND THE TEMPERATURE DROPPED TO A MINIMUM OF 7.7 DEGREES CELSIUS, THE LOWEST OF THE MONTH, IN THE MORNING OF DECEMBER 29 WHEN STRONG NORTHERLY WINDS AFFECTED HONG KONG. ON THE SAME DAY, MINIMUM TEMPERATURES OF -2.0 DEGREES CELSIUS WERE RECORDED ON TAI MO SHAN AND 1.1 DEGREES CELSIUS AT TATE'S CAIRN, BUT NO REPORTS OF HOAR FROST WERE RECEIVED.
AN ESTIMATED 30 TONNES OF TILAPIA, A COMMON KIND OF FISH REARED IN THE NEW TERRITORIES, DIED IN THE COLD WEATHER. WINDS MODERATED ON DECEMBER 30 AND TEMPERATURES GRADUALLY ROSE ON THE LAST TWO DAYS OF THE MONTH.
TYPHOON +DOYLE+ WAS THE ONLY TROPICAL CYCLONE OVER THE WESTERN NORTH PACIFIC AND THE SOUTH CHINA SEA DURING THE MONTH. IT DEVELOPED NEAR YAP ON DECEMBER 5, RECURVED ABOUT 430 NAUTICAL MILES EAST OF LUZON ON DECEMBER 9 AND MOVED NORTH-EASTWARDS. IT DISSIPATED OVER THE PACIFIC SOUTH OF JAPAN TWO DAYS LATER.
DURING THE MONTH NO AIRCRAFT WERE DIVERTED FROM HONG KONG DUE TO ADVERSE WEATHER. THE RED FIRE DANGER WARNING WAS IN EFFECT ON DECEMBER 1, 2 AND 23 TO 31 WHILST THE YELLOW FIRE DANGER WARNING WAS IN EFFECT ON DECEMBER 2, 3, 9, 16, 22, 23 AND 31.
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SIGNALS HOISTED DURING THE MONTH WERE AS FOLLOWS:
DATE AND TIME OF HOISTING
DATE AND TIME OF LOWERING
DECEMBER 22 8.00 AM
WEATHER SYSTEM
SIGNAL
WINTER MONSOON
STRONG MONSOON
DECEMBER 21 5.30 PM
WINTER MONSOON
STRONG MONSOON
WINTER MONSOON
STRONG MONSOON
DECEMBER 28
11.15 PM
DECEMBER 29
10.35 AM
DECEMBER 23 5.10 AM
DECEMBER 23 9.05 AM
/THE MONTH'S
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