TUESDAY, JULY 10, 1990
11
THE WEATHER TURNED CLOUDY ON JUNE 29 AS TYPHOON PERCY APPROACHED THE SOUTHEAST COAST OF CHINA. AN OUTER RAINBAND OF PERCY BROUGHT SOME SHOWERS THAT MORNING. HOWEVER, HEAVIER RAIN DID NOT MATERALISE TILL THE NEXT DAY AS PERCY MOVED FURTHER INLAND.
AN UNSTABLE SOUTHWESTERLY AIRSTREAM ENCROACHED UPON THE COASTAL AREAS IN THE WAKE OF PERCY. INTENSE RAIN CLOUDS DEVELOPED FREQUENTLY OVER. THE PEARL RIVER ESTUARY AND MOVED IN SUCCESSION ACROSS THE TERRITORY, BRINGING PERIODS OF HEAVY RAIN AND THUNDERSTORMS WHICH PERSISTED THROUGHOUT THE DAY.
THREE CASES OF LANDSLIPS AND OVER 30 CASES OF FLOODING WERE RPORTED, MOSTLY IN KOWLOON AND THE NEW TERRITORIES. A BOY WAS DROWNED AFTER BEING WASHED AWAY IN A FLOODED CULVERT IN KWAI CHUNG.
THE SEVERE WEATHER ALSO DISRUPTED ROAD TRAFFIC IN MANY PARTS OF THE TERRITORY.
FOUR TROPICAL CYCLONES OCCURRED OVER THE WESTERN NORTH PACIFIC AND THE SOUTH CHINA SEA IN JUNE.
JUNE 8,
DURING THE MONTH, NINE AIRCRAFT WERE DIVERTED DUE ΤΟ ADVERSE WEATHER. THUNDERSTORM WARNINGS WERE IN EFFECT ON
6-11, 17. 26, 28-30. FLOOD WARNINGS WERE ISSUED ON JUNE 1, LANDSLIP WARNINGS WERE ISSUED ON JUNE 1 AND 30.
WEATHER SYSTEM
16 AND 30 AND
SIGNALS HOISTED DURING THE MONTH WERE AS FOLLOWS:
SIGNAL
DATE AND TIME
OF HOISTING
DATE AND TIME OF LOWERING
SEVERE TROPICAL
1
JUNE 17
STORM NATHAN
3
4.05 PM JUNE 17
10 PM
TYPHOON PERCY
1
JUNE 28 8 AM
JUNE 17
10 PM JUNE 18
10.10 AM
JUNE 29
1.
.30 PM
TOTAL BRIGHT SUNSHINE
THE MONTH'S FIGURES AND DEPARTURES FROM NORMAL WERE:
149.7 HOURS ; 9.5 HOURS BELOW NORMAL
MEAN DAILY GLOBAL SOLAR
RADIATION
13.89 MJ/SQ.M ;
2.80 MJ/SQ.M BELOW NORMAL
TOTAL RAINFALL
448.1 MM;
16.3 MM ABOVE NORMAL
MEAN AMOUNT OF CLOUD
77 PER CENT ;
2 PER CENT MORE THAN NORMAL
MEAN RELATIVE HUMIDITY
85 PER CENT ;
1 PER CENT HIGHER THAN NORMAL
/MEAN DAILY