10
THURSDAY, OCTOBER 11, 1990
THE RAIN EASED OFF ON SEPTEMBER 20 AND OVER THE NEXT FOUR DAYS, WITH ISOLATED LIGHT INTERSPERSED OF SUNSHINE PERIODS THERE WERE SHOWERS.
LOW
ON PRESSURE
THE EVENING OF THE NEXT
THE PASSAGE OF A TROUGH OF SEPTEMBER 24 WAS FOLLOWED BY HEAVIER RAIN AND THUNDERSTORMS DAY.
SHOWERS,
AND SUNNY
FINE
THEREAFTER, A COMBINATION OF CLOUD, LIGHT
BEFORE BRILLIANTLY INTERVALS
UNTIL SEPTEMBER 28 CONTINUED WEATHER SET IN FOR THE LAST TWO DAYS OF THE MONTH.
THE MONTH,
SIX TROPICAL CYCLONES, OF WHICH FIVE FORMED WITHIN OCCURRED OVER THE WESTERN NORTH PACIFIC AND THE SOUTH CHINA SEA.
DURING THE MONTH OF SEPTEMBER,
DUE TO ADVERSE WEATHER.
SEVEN
AIRCRAFTS WERE
DIVERTED
24-
THUNDERSTORM WARNINGS WERE ISSUED ON SEPTEMBER 5-12, 19-20,
AND 19 25, AND 28. FLOOD WARNINGS WERE ISSUED ON SEPTEMBER 8, 10-11, AND A LANDSLIP WARNING WAS IN EFFECT ON SEPTEMBER 11.
THE ONLY SIGNAL HOISTED DURING THE MONTH WAS AS FOLLOWS:
WEATHER SYSTEM
SIGNAL
DATE AND TIME
OF HOISTING
DATE AND TIME OF LOWERING
TYPHOON ED
1
SEPTEMBER 14 11.00 PM
SEPTEMBER 17
7.45 AM
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
168.8 HOURS; 19.7 HOURS BELOW NORMAL
13.72 MJ/SQ METRE; 3.01 MJ/SQ METRE
BELOW NORMAL
409.9 MM; 89.5 MM ABOVE NORMAL
65 PER CENT 3 PER CENT MORE THAN NORMAL
79 PER CENT; NORMAL
30.2 DEGREES; 0.3 DEGREE CELSIUS BELOW CELSIUS
NORMAL
27.8 DEGREES; 0.3 DEGREE CELSIUS ABOVE
NORMAL CELSIUS
25.8 DEGREES ; 0.6 DEGREE CELSIUS ABOVE CELSIUS
NORMAL
23.8 DEGREES ; CELSIUS
0.6 DEGREE CELSIUS ABOVE NORMAL
107.2 MM; 48.7 MM BELOW NORMAL
0
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