17
TUESDAY, SEPTEMBER 11, 1990
WITH YANCY MOVING ACROSS NORTHERN TAIWAN AND
SUBSEQUENTLY HOVERING OVER THE COAST OF FUJIAN BETWEEN AUGUST 20 AND 22. CLOUDY WEATHER SPREAD ACROSS SOUTHERN CHINA.
THE CLOUDS FINALLY BROKE ON AUGUST 23, GIVING RISE TO PERIODS OF SUNSHINE DURING THE DAY. THE REMNANT OF YANCY DRIFTED WESTWARDS ALONG THE COASTAL AREAS OF GUANGDONG THAT EVENING AND BROUGHT SOME LIGHT RAIN TO THE TERRITORY.
GENERALLY FINE WEATHER THEN PREVAILED FOR THE NEXT THREE DAYS APART FROM SOME LIGHT SHOWERS IN THE MORNING OF AUGUST 25 AND OFFSHORE THUNDERSTORMS EARLY ON AUGUST 26.
SWEPT
MEANWHILE, SEVERE TROPICAL STORM BECKY
ACROSS NORTHERN LUZON AND INTENSIFIED TO A TYPHOON OVER THE SOUTH CHINA SEA. THE WEATHER TURNED CLOUDY AS THE EASTERLIES FRESHENED ON AUGUST 27.
WINDS BECAME GENERALLY STRONG THE NEXT DAY AND SQUALLY SHOWERS BUFFETED THE TERRITORY. THE WIND AND SHOWERS EASED OFF ON AUGUST 29 AS BECKY PASSED BY TO THE SOUTH OF HAINAN.
THE WEATHER IMPROVED FURTHER FOLLOWING THE DISSIPATION OF BECKY AND FINE CONDITIONS PREVAILED ON THE LAST TWO DAYS OF THE MONTH,
EIGHT TROPICAL CYCLONES, OF WHICH SIX FORMED WITHIN THE MONTH, OCCURRED OVER THE WESTERN NORTH PACIFIC AND THE SOUTH CHINA SEA.
DURING THE MONTH OF AUGUST, ONLY ONE AIRCRAFT WAS DIVERTED TO WINDY CONDITIONS ASSOCIATED WITH BECKY ON AUGUST 28. THUNDERSTORM WARNINGS WERE IN EFFECT ON AUGUST 2, 3, 4, 5, 11, 13, 16, 18, AND 26. FLOOD WARNINGS WERE ISSUED ON AUGUST 2 AND 3.
WEATHER SYSTEM
SIGNALS HOISTED DURING THE MONTH WERE AS FOLLOWS:
SIGNAL
DATE AND TIME OF HOISTING
DATE AND TIME OF LOWERING
TYPHOON BECKY
1 3
AUGUST 27 6 AM AUGUST 28 5 AM
AUGUST 28 5 AM AUGUST 28 8.10 PM
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
205.8 HOURS ; 0.2 HOURS BELOW NORMAL
17.11 MJ/SQ METRE ; 0.61 MJ/SQ METRE
BELOW NORMAL
150.1 MM 263.3 MM BELOW NORMAL
67 PER CENT ; 1 PER CENT MORE THAN NORMAL
75 PER CENT : 8 PER CENT LOWER THAN
NORMAL
/MEAN DAILY
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