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THURSDAY, JANUARY 10, 1991
AND WARM DAY. VISIBILITY IN TO AFFECT
AS THE EASTERLIES MODERATED, THE WEATHER TURNED FINE FOLLOWING
PATCHES SOME MIST
EARLIER
THE IN DETERIORATED AGAIN IN THE EVENING AS FOG PATCHES MOVED THE HARBOUR AREAS.
PACIFIC
TWO TROPICAL CYCLONES OCCURRED OVER THE WESTERN NORTH
FOGGY CONDITIONS DURING THE MONTH. TWO AIRCRAFT WERE DIVERTED DUE TO ON DECEMBER 31.
THE YELLOW FIRE DANGER WARNING WAS IN EFFECT ON DECEMBER 8, EFFECT 16, 24 TO 28 AND 30 AND THE RED FIRE DANGER WARNING WAS IN DECEMBER 1 TO 6, 22 AND 23.
SIGNALS HOISTED DURING THE MONTH WERE AS FOLLOWS:
9.
ON
WEATHER SYSTEM SIGNAL DATE & TIME OF HOISTING DATE & TIME OF LOWERING
WINTER MONSOON
STRONG MONSOON
NOVEMBER 30
7.15 PM
DECEMBER 2
4.50 AM
WINTER MONSOON
STRONG MONSOON
DECEMBER 11
11 PM
DECEMBER 12
8 AM
WINTER MONSOON
STRONG
DECEMBER 27
6.30 AM
DECEMBER 27
3.20 PM
MONSOON
THE MONTH'S FIGURES AND DEPARTURES FROM NORMAL WERE:
TOTAL BRIGHT SUNSHINE
MEAN DAILY GLOBAL SOLAR RADIATION
TOTAL RAINFALL
MEAN AMOUNT OF CLOUD
MEAN RELATIVE HUMIDITY
MEAN DAILY MAXIMUM AIR TEMPERATURE
MEAN AIR TEMPERATURE
MEAN DAILY MINIMUM AIR TEMPERATURE
MEAN DEW POINT
TOTAL EVAPORATION
218.7 HOURS; 39.4 HOURS ABOVE NORMAL
12.41 MJ/ SQ.M.; 0.18 MJ/SQ.M. ABOVE NORMAL
0.1 MM: 25.2 MM BELOW NORMAL
39 PER CENT; 13 PER CENT LESS THAN NORMAL
69 PER CENT; NORMAL
21.1 DEGREES CELSIUS; 0.3 DEGREE CELSIUS ABOVE NORMAL
18.8 DEGREES CELSIUS; 1.1 DEGREES CELSIUS ABOVE NORMAL
17 DEGREES CELSIUS; 1.8 DEGREES CELSIUS ABOVE NORMAL
12.6 DEGREES CELSIUS; 1.2 DEGREES CELSIUS ABOVE NORMAL
89 MM; 27 MM BELOW NORMAL
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