PRESS WEATHER NO. 139 - HOURLY READINGS

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HOURLY READINGS

 

AT NOON AT THE HONG KONG OBSERVATORY THE AIR TEMPERATURE
WAS 31 DEGREES CELSIUS AND THE RELATIVE HUMIDITY 69 PER
CENT.
DURING THE PAST HOUR THE MEAN UV INDEX RECORDED AT KING'S
PARK WAS 7. THE INTENSITY OF UV RADIATION WAS HIGH.

 

THE TROPICAL CYCLONE OVER LUZON WILL ENTER WITHIN 800
KILOMETRES OF HONG KONG LATER TODAY (17 SEPTEMBER). THE
OBSERVATORY WILL ISSUE THE STANDBY SIGNAL, NO. 1 TONIGHT.
 
THE TROPICAL CYCLONE IS EXPECTED TO MOVE ACROSS THE
NORTHEASTERN PART OF THE SOUTH CHINA SEA IN THE NEXT COUPLE
OF DAYS. IT WILL INTENSIFY GRADUALLY AND MOVE IN THE
GENERAL DIRECTION OF THE COAST OF EASTERN GUANGDONG. UNDER
THE INFLUENCE OF THE NORTHEAST MONSOON, THE TROPICAL
CYCLONE WILL THEN TURN WESTWARDS, EDGING CLOSER TO THE
VICINITY OF THE PEARL RIVER ESTUARY. HOWEVER, THERE ARE
UNCERTAINTIES IN ITS LANDFALL POSITION AND INTENSITY. AS
ITS CIRCULATION IS RELATIVELY SMALL, THE TROPICAL CYCLONE
WILL ONLY BRING SIGNIFICANT IMPACT TO LOCAL WEATHER WHEN IT
GETS RELATIVELY CLOSE TO HONG KONG. DEPENDING ON THE
INTENSITY OF THE TROPICAL CYCLONE, THE DISTANCE OF ITS
STRONG WINDS FROM HONG KONG AND THE CHANGE IN LOCAL WIND
CONDITIONS, THE OBSERVATORY WILL ASSESS THE NEED TO ISSUE
HIGHER TROPICAL CYCLONE WARNING SIGNALS LATER ON THURSDAY
(18 SEPTEMBER) TO FRIDAY (19 SEPTEMBER).
 
UNDER THE INFLUENCE OF THE OUTER RAINBANDS ASSOCIATED WITH
THE TROPICAL CYCLONE, THE LOCAL WEATHER WILL BECOME
UNSETTLED ON FRIDAY. IT WILL BE WINDY WITH OCCASIONAL HEAVY
SQUALLY SHOWERS AND THUNDERSTORMS OVER THE WEEKEND. THERE
WILL BE SWELLS.
 
ON THE OTHER HAND, ANOTHER TROPICAL CYCLONE IS EXPECTED TO
FORM OVER THE WESTERN NORTH PACIFIC TO THE EAST OF THE
PHILIPPINES TODAY AND TOMORROW. IT WILL INTENSIFY
SIGNIFICANTLY AND MOVE ACROSS THE VICINITY OF LUZON STRAIT.
IT WILL ENTER THE NORTHERN PART OF THE SOUTH CHINA SEA
EARLY NEXT WEEK AND EDGE CLOSER TO THE COAST OF SOUTHERN
CHINA. UNDER THE INFLUENCE OF THE EXTENSIVE CIRCULATION OF
THE TROPICAL CYCLONE, THE WEATHER WILL DETERIORATE
SIGNIFICANTLY OVER THE REGION MIDWEEK NEXT WEEK. WINDS WILL
STRENGTHEN AGAIN WITH HEAVY SQUALLY SHOWERS AND
THUNDERSTORMS. SEAS WILL BE ROUGH WITH SWELLS. SINCE STORM
SURGE MAY BE QUITE SIGNIFICANT BY THEN, THERE MAY BE
FLOODING OVER THE COASTAL AREAS. 
 
MEMBERS OF THE PUBLIC SHOULD TAKE NOTE OF THE LATEST
WEATHER INFORMATION FROM THE OBSERVATORY.

 

PLEASE BE REMINDED THAT:

 

THE VERY HOT WEATHER WARNING IS NOW IN FORCE. THE PUBLIC
SHOULD BEWARE OF HEAT STROKE AND DRINK MORE WATER.

 

THE AIR TEMPERATURES AT OTHER PLACES WERE:

 

KING'S PARK                 31 DEGREES;
WONG CHUK HANG              33 DEGREES;
TA KWU LING                 33 DEGREES;
LAU FAU SHAN                33 DEGREES;
TAI PO                      32 DEGREES;
SHA TIN                     31 DEGREES;
TUEN MUN                    32 DEGREES;
TSEUNG KWAN O               31 DEGREES;
SAI KUNG                    32 DEGREES;
CHEUNG CHAU                 31 DEGREES;
CHEK LAP KOK                33 DEGREES;
TSING YI                    33 DEGREES;
SHEK KONG                   // DEGREES;
TSUEN WAN HO KOON           30 DEGREES;
TSUEN WAN SHING MUN VALLEY  32 DEGREES;
HONG KONG PARK              31 DEGREES;
SHAU KEI WAN                30 DEGREES;
KOWLOON CITY                32 DEGREES;
HAPPY VALLEY                32 DEGREES;
WONG TAI SIN                32 DEGREES;
STANLEY                     32 DEGREES;
KWUN TONG                   31 DEGREES;
SHAM SHUI PO                33 DEGREES;
KAI TAK RUNWAY PARK         31 DEGREES;
YUEN LONG PARK              35 DEGREES;
TAI MEI TUK                 31 DEGREES.

 

18.1 MILLIMETRES OF RAINFALL WERE RECORDED AT THE HONG KONG
OBSERVATORY BETWEEN MIDNIGHT LAST NIGHT AND MIDDAY TODAY. 

 

HERE IS THE INFORMATION ON TROPICAL DEPRESSION AT NOON:
LOCATION: 17.3 DEGREES NORTH, 121.4 DEGREES EAST.

DISPATCHED BY HONG KONG OBSERVATORY AT 12:07 HKT ON 17.09.2025