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Bulletin issued at 23:41 HKT 24/Sep/2018

At 11 p.m. at the Hong Kong Observatory the air temperature was 26 degrees Celsius and the relative humidity 92 per cent.

The air temperatures at other places were:

King's Park 25 degrees;
Wong Chuk Hang 26 degrees;
Ta Kwu Ling 26 degrees;
Lau Fau Shan 25 degrees;
Tai Po 26 degrees;
Sha Tin 27 degrees;
Tuen Mun 26 degrees;
Tseung Kwan O 26 degrees;
Sai Kung 27 degrees;
Cheung Chau 25 degrees;
Chek Lap Kok 27 degrees;
Tsing Yi 26 degrees;
Shek Kong 26 degrees;
Tsuen Wan Ho Koon 24 degrees;
Tsuen Wan Shing Mun Valley 25 degrees;
Hong Kong Park 25 degrees;
Shau Kei Wan 26 degrees;
Kowloon City 25 degrees;
Happy Valley 26 degrees;
Wong Tai Sin 26 degrees;
Stanley 26 degrees;
Kwun Tong 26 degrees;
Sham Shui Po 26 degrees;
Kai Tak Runway Park 26 degrees;
Yuen Long Park 26 degrees;
Tai Mei Tuk 26 degrees.

Between 9:45 and 10:45 p.m., the rainfall recorded in various regions were:

Southern District 0 to 1 mm.


Note: The data above is provisional. Only limited data validation has been carried out.


Climatological Information for 24 Sep

Regional Weather in Hong Kong

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Hong Kong Climatology


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Bulletin updated at 23:15 HKT 24/Sep/2018

Here is the latest weather bulletin issued by the Hong Kong Observatory.

Showers and thunderstorms affected Guangdong and the northern part of the South China Sea today. Locally, it was mainly cloudy with occasional showers and thunderstorms. Showers were heavy in the morning. More than 30 millimetres of rainfall were generally recorded over the territory, and rainfall even exceeded 70 millimetres over Tai Po, Kwai Tsing and Kowloon. An easterly airstream is expected to affect the south China coast tomorrow.

Besides, Tropical Cyclone Trami intensified from a severe typhoon into a super typhoon this morning. At 11 p.m., Trami was centred about 1010 kilometres east-southeast of Gaoxiong. It is forecast to move slowly across the western North Pacific.

Weather forecast for Hong Kong (Tuesday, 25 Sep 2018)

Mainly cloudy with occasional showers and thunderstorms. Showers will ease off gradually. There will be sunny periods during the day. Temperatures will range between 25 and 30 degrees. Moderate to fresh easterly winds, occasionally strong offshore at first.

Outlook : Becoming fine and dry with relatively large temperature difference between day and night in the following couple of days.


(The above forecast period is valid up to 23:59 HKT tomorrow, 25/09/2018; Regular update at : around 45 minutes past each hour, 16:15 HKT and 23:15 HKT)

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MARINE FORECAST
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Marine Forecast

Weather Information for the Marine Community

Bulletin issued at 21:00 HKT 24/Sep/2018

GALE WARNING AREAS: KWANGTUNG, TAIWAN STRAIT, BASHI, PRATAS AND BALINTANG.

GENERAL SITUATION AT 240900 UTC:
SUPER TYPHOON TRAMI (1824) 925 HPA 19N 130E WNW 5KT INTST NC.

MARINE FORECAST FOR 24 HOURS FROM 241300 UTC:

HONG KONG= E 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL E UP TO 2 M. TEMP 25-30 C. =
KWANGTUNG= E TO NE 6-7, 8 IN E. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 3-4 M, 6 M IN E. SWELL E 2-3 M. =
TAIWAN STRAIT= NE 7-8. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 4-6 M. SWELL NE 2-3 M. =
BASHI= N TO NE 6-7, UP TO 8 LATER. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 3-4 M, UP TO 6 M LATER. SWELL E 3-5 M. =
PRATAS= NE 6-7, OCNL 8. ISOL SHOWERS AND TS. SEA UP TO 6 M. SWELL E 2 M. =
BALINTANG= N TO NE 6-7, UP TO 8 LATER. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 3-4 M, UP TO 6 M LATER. SWELL E 3-5 M. =
SCARBOROUGH= N TO NE 4-5, OCNL 6. ISOL SHOWERS AND TS. SEA UP TO 3 M. SWELL E TO NE 2 M. =
PARACEL= E TO NE 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL E UP TO 2 M. =
TONKIN= E 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
DANANG= E 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
NNNN
Abbreviations:
KT, VRB, SLW, FRQ - knot, variable, slow, frequent STNR, QSTNR, C - stationary, quasi-stationary, degrees celsius WKN, INTSF, INTST, NC - weaken, intensify, intensity, no change LGT, ISOL, SCT, OCNL - light, isolated, scattered, occasional CLD, DZ, TS - cloudy, drizzle, thunderstorm

The date and time are specified by a 6-digit number DDHHMM. DD stands for the day of month, HH represents the hour while MM indicates the minute in UTC.


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    • SOUTH CHINA COASTAL WATERS
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    South China Coastal Waters

    Current Weather | Local Weather Forecast | Regional Temperature Forecast in HK
    9-day Weather Forecast | UV Index Forecast | Weather Information for Fishermen

    Bulletin issued at 23:30 HKT 24/Sep/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 11:30 p.m. on 24 September 2018

    Warnings:
    Gale force winds in Nan'ao. Strong winds in Hong Kong adjacent waters, Shanwei and south of Hong Kong.

    Weather Situation:
    An easterly airstream is affecting the south China coastal waters.

    At 11 p.m., Super Typhoon Trami with maximum sustained winds of about 205 kilometres per hour near its centre was located near 19.5 degrees north, 129.4 degrees east. It is forecast to move slowly across the western North Pacific.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East force 5 to 6.
    Isolated squally showers and thunderstorms.
    Moderate to rough seas.

    Nan'ao:
    Northeast force 7 to 8.
    Isolated squally showers and thunderstorms.
    Rough to very rough seas.

    Shanwei:
    East to northeast force 6 to 7.
    Isolated squally showers and thunderstorms.
    Rough seas.

    South of Hong Kong:
    East force 5 to 6.
    Isolated squally showers and thunderstorms.
    Moderate to rough seas.

    Shangchuan Dao:
    East force 4 to 5.
    Isolated squally showers and thunderstorms.
    Moderate seas.

    Outlook for the next 48 hours
    Northeasterly winds of force 6 to 7, up to force 8 in east. Isolated showers and thunderstorms.

    Latest reports from south China coastal weather stations
    --------------------------------------------------------

    Waglan Island Wind east force 5
      Visibility 13 Kilometres

    Shantou Wind east-northeast force 1
      Visibility 30 Kilometres

    Huangmaozhou Wind east force 5

    Macau Wind east force 2
      Visibility 19 Kilometres

    Xisha Wind calm
      Visibility 30 Kilometres

  • Explanation of Seas or Sea Waves
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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 17:30 HKT 24/SEP/2018
    (Next update at 01:30 HKT 25/SEP/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AN EASTERLY AIRSTREAM IS AFFECTING THE SOUTH
     CHINA COASTAL AREAS.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  080/5-10, 10-15 LATER
                  TEMPO VRB/15G25 IN TS
       OFFSHORE:  090/10-15 OCNL 20 LATER              29-25
   B.   2000 FT:  090/10-15 OCNL 20 LATER              23
   C.   5000 FT:  050/10                               17
   D.  10000 FT:  360/10                               10
   E.  18000 FT:  340/15                               MS3
   F.  24000 FT:  340/15                               MS13
   G.  30000 FT:  350/20                               MS26
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY. OCCASIONAL SHOWERS AND
      THUNDERSTORMS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT SCT 5000 FT. TEMPO FEW CB 1000 FT
      SCT 2000 FT BKN 4000 FT.
   K. VISIBILITY    : 10 KM. TEMPO 3500 M IN SHOWERS. TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 16500 FT      10 DEG. C LEVEL(S) : 10000 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS. MOD OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 1.0-2.5 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH EASTERLY WINDS,OCCASIONALLY
     STRONG OFFSHORE AT FIRST.  MAINLY CLOUDY WITH A
     FEW SHOWERS AND THUNDERSTORMS AT FIRST. SUNNY
     PERIODS DURING THE DAY.=

    ===================================================================
Note: The forecast could be updated before the next issue time 
whenever there is newly expected occurrence or non-occurrence 
of significant weather as described below which may be hazardous 
to aircraft within 100-km radius of Hong Kong:

(a) Change of the tropical cyclone category
(b) Strong, Gale, Storm, and Hurricane force winds
(c) Thunderstorm/CBs
(d) Severe gusts
(e) Severe turbulence
(f) Significant low stratus
(g) Fog or thick haze/sandstorm/duststorm 
    causing significant reduction of visibility
(h) Volcanic ash
(i) Radioactive cloud
===================================================================
    Aviation Weather Observation and Forecast Information for Hong Kong International Airport
    To know more about clouds, please see Commonly observed clouds in Hong Kong.

    sigmet
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    Significant Weather Information (SIGMET)

    The Airport Meteorological Office is responsible for monitoring hazardous weather and phenomena in the atmosphere that may affect the safety of aircraft operations within a designated airspace over the northern part of the South China Sea. Weather forecasters at the Airport Meteorological Office issues SIGMET information when hazardous weather and phenomena in the atmosphere such as thunderstorms, tropical cyclones, turbulence, icing occur or are expected to occur in the airspace.

    The latest significant weather information
    issued by the Hong Kong Observatory at 12:15 HKT on 24 Sep 18

    VHHK SIGMET 1 VALID 240025/240425 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2118 E11642 - N2200 E11300 - N2212 E11312 - N2254 E11448 - N2300 E11618 - N2118 E11642 TOP FL350 STNR NC= VHHK SIGMET 2 VALID 240425/240825 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2112 E11618 - N2000 E11506 - N2112 E11442 - N2100 E11130 - N2130 E11130 - N2330 E11612 - N2112 E11618 TOP FL370 STNR NC=

    Please click here for more about the SIGMET

    Tropical Cyclone Warning
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    Tropical Cyclone Warning

    There is no tropical cyclone warning signal.

    For other tropical cyclone related information, please visit the World Meteorological Organization Web Site - Severe Weather Information Centre.

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    TROPICAL CYCLONE WARNING FOR SHIPPING
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    Tropical Cyclone Warning for Shipping

    There is no tropical cyclone warning for shipping*.




    *Tropical cyclone warnings for shipping are issued by the Hong Kong Observatory for tropical cyclones located within the area bounded by 105E and 125E , 10N and 30N.




    For other tropical cyclone related information, please visit the World Meteorological Organization Web Site - Severe Weather Information Centre.

    YESTERDAY'S WEATHER AND RADIATION LEVEL Skip to main content
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    Yesterday's Weather and Radiation Level

    Bulletin issued at 00:15 HKT 24/Sep/2018 
    HKO Readings & Radiation Level

Yesterday's Weather and Radiation Level:
------------------------------------------------------

Hong Kong Observatory
Maximum Air Temperature                     32.4 C
Minimum Air Temperature                     27.6 C
Grass Minimum Temperature                   26.5 C
Relative Humidity                        67 - 85 Percent
Rainfall                                      Trace 
Total rainfall since 1st January          1856.9 mm
Against an average of                     2177.6 mm

Other Stations                Min                  Max
King's Park                  26.7 C               32.4 C
Wong Chuk Hang               25.8 C               31.3 C
Ta Kwu Ling                  25.7 C               33.3 C
Lau Fau Shan                 25.4 C               30.7 C
Tai Po                       25.9 C               32.0 C
Sha Tin                      26.3 C               32.5 C
Tuen Mun                     26.0 C               33.0 C
Tseung Kwan O                25.8 C               32.0 C
Sai Kung                     27.0 C               32.7 C
Cheung Chau                  25.4 C               34.5 C
Chek Lap Kok                 27.5 C               32.9 C
Tsing Yi                     26.6 C               31.4 C
Shek Kong                    24.9 C               33.2 C
Tsuen Wan Ho Koon            24.5 C               30.8 C
Tsuen Wan Shing Mun Valley   25.1 C               31.8 C
Hong Kong Park               25.5 C               32.5 C
Shau Kei Wan                 26.5 C               30.9 C
Kowloon City                 26.6 C               33.1 C
Happy Valley                 26.8 C               32.7 C
Wong Tai Sin                 26.8 C               32.9 C
Stanley                      26.8 C               32.1 C
Kwun Tong                    25.7 C               31.7 C
Sham Shui Po                 26.1 C               32.4 C
Kai Tak Runway Park          27.3 C               30.7 C
Yuen Long Park               25.2 C               33.7 C
Tai Mei Tuk               26.0 C               34.6 C

Duration of sunshine (King's Park):              6.6 H
The mean UV index recorded at King's Park yesterday was 4,
the UV intensity was Moderate.
The maximum UV index for yesterday was 10.
 

Yesterday's (23 Sep 2018) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.08 to
0.14 microsievert per hour.  These are within the normal
range of fluctuation of the background radiation level in
Hong Kong (see Note). The average dose rates measured at the
radiation monitoring stations over various parts of the
territory were as follows :

Station                     Yesterday's average
                            (microsievert/hour)
Ping Chau                           0.09
Tap Mun                             0.08
Kat O                               0.09
Yuen Ng Fan                         0.11
Tai Mei Tuk                         0.11
Sha Tau Kok                         0.10
Kwun Tong                           0.12
Sai Wan Ho                          0.08
King's Park                         0.14
Tsim Bei Tsui                       0.13
Cape D'Aguilar                      0.13
Chek Lap Kok                        0.14

Note

      

    1. From readings taken at various locations in Hong Kong in the
past, the hourly mean ambient gamma radiation dose rate may
vary between 0.06 and 0.3 microsievert per hour. (1
microsievert = 0.000001 sievert = 0.001 millisievert)

    2. Temporal variations are generally caused by changes in
meteorological conditions such as rainfall, wind and
barometric pressure.

    3. Spatial variations are generally caused by differences in
the radioactive content of local rock and soil.

    4. The data displayed is provisional. Only limited data
validation has been carried out.
    Climatological Information for 23 Sep
     2003copy right image | Important notices | Privacy policy Last revision date: <24 Sep 2018> 

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