18
TUESDAY, MAY 10, 1988
A TROUGH OF LOW PRESSURE OVER SOUTH CHINA BROUGHT SOME
WINDS ASSOCIATED SOUTHWESTERLY TO HONG KONG ON APRIL 28.
THE FOR
WITH
SHOWERS THE 29.2 DEGREES CELSIUS MONTH. THIS WAS ALSO THE HIGHEST
TROUGH BROUGHT THE TEMPERATURE TO A MAXIMUM OF WHICH WAS THE HIGHEST RECORDED FOR THE YEAR UP TO THAT DATE.
TROUGH THAT EVENING, SHOWERS AND
TWO REMAINING
DAYS OF
THE APRIL,
DURING THE PASSAGE OF THE THUNDERSTORMS OCCURRED. FOR THE WEATHER CONTINUED TO BE CLOUDY WITH ISOLATED SHOWERS.
DURING
THE
MONTH,
NO THE
CYCLONE
OCCURRED OVER
THE
SEA. ONE
AIRCRAFT
WAS
TROPICAL
CHINA SOUTH WESTERN NORTH PACIFIC AND DIVERTED FROM HONG KONG DUE TO ADVERSE WEATHER.
THUNDERSTORM WARNINGS WERE ISSUED ON APRIL 7 * 21
22, 28 AND 30 WHILE A FLOOD WARNING WAS ISSUED ON RED FIRE DANGER WARNING WAS IN EFFECT ON APRIL 9, 10,
8.
11, 12,
20,
APRIL 20. THE
15 AND 24.
THE ONLY SIGNAL HOISTED DURING THE MONTH WAS AS FOLLOWS:
WEATHER SYSTEM
SIGNAL
DATE AND TIME OF
HOISTING
DATE AND TIME OF
LOWERING
WINTER MONSOON STRONG MONSOON
APRIL 8
10.15 PM
APRIL 11 7 AM
THE MONTH'S FIGURES AND DEPARTURES FROM NORMAL WERE:
TOTAL BRIGHT SUNSHINE
MEAN DAILY GLOBAL SOLAR RADIATION
74.0 HOURS ;
10.53 MJ/SQ.M;
46.2 HOURS BELOW NORMAL
3.16 MJ/SQ.M BELOW NORMAL
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
82.4 MM;
84 PER CENT ;
78 PER CENT ;
23.1 DEGREES ; CELSIUS
20.8 DEGREES ; CELSIUS
18.9 DEGREES CELSIUS
16.5 DEGREES :
CELSIUS
57.0 MM BELOW NORMAL
8 PER CENT MORE THAN NORMAL
5 PER CENT LOWER THAN NORMAL
1.9 DEGREES CELSIUS BELOW NORMAL
1.3 DEGREES CELSIUS BELOW NORMAL
1
1 DEGREES CELSIUS BELOW NORMAL
2.4 DEGREES CELSIUS BELOW NORMAL
TOTAL EVAPORATION
89.6 MM ;
22.9 MM BELOW NORMAL
/19
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