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Weather Information for South China Coastal Waters

Bulletin issued at 13:02 HKT 04/Sep/2016

At 1 p.m. at the Hong Kong Observatory the air temperature was 29 degrees Celsius and the relative humidity 80 per cent.
During the past hour the mean UV Index recorded at King's Park was 8. The intensity of UV radiation was very high.

The air temperatures at other places were:

King's Park 29 degrees;
Wong Chuk Hang 30 degrees;
Ta Kwu Ling 30 degrees;
Lau Fau Shan 29 degrees;
Tai Po 29 degrees;
Sha Tin 30 degrees;
Tuen Mun 27 degrees;
Tseung Kwan O 28 degrees;
Sai Kung 29 degrees;
Cheung Chau 27 degrees;
Chek Lap Kok 31 degrees;
Tsing Yi 31 degrees;
Shek Kong 30 degrees;
Tsuen Wan Ho Koon 29 degrees;
Tsuen Wan Shing Mun Valley 31 degrees;
Hong Kong Park 29 degrees;
Shau Kei Wan 27 degrees;
Kowloon City 31 degrees;
Happy Valley 29 degrees;
Wong Tai Sin 29 degrees;
Stanley 28 degrees;
Kwun Tong 28 degrees;
Sham Shui Po 31 degrees;
Kai Tak Runway Park 29 degrees;
Yuen Long Park 31 degrees.

Between 11:45 a.m. and 12:45 p.m., the rainfall recorded in various regions were:

Tuen Mun 0 to 4 mm.


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


Climatological Information for 4 Sep

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


Local Weather Forecast
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Automatic Regional Weather Forecast in Hong Kong & Pearl River Delta Region

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UV Index Forecast |  Weather Information for South China Coastal Waters

Bulletin updated at 12:45 HKT 04/Sep/2016

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

Showers and thunderstorms associated with a trough of low pressure are affecting the northern part of the South China Sea. Locally, showers around noon brought more than 10 millimetres of rainfall to Tuen Mun.

At noon, Tropical Storm Namtheun was centred about 100 kilometres west of Kagoshima. It is forecast to move north or north-northwest at about 10 kilometres per hour in the general direction of Kyushu of Japan and weaken gradually.

Weather forecast for this afternoon and tonight

Mainly cloudy with a few showers and thunderstorms. Sunny intervals in the afternoon. Moderate easterly winds.

Outlook : Weather remaining unsettled with a few showers in the next few days.


(The above forecast period is valid up to 23:59 HKT today, 04/09/2016; Regular update at : around 45 minutes past each hour, 16:15 HKT and 23:15 HKT)

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MARINE FORECAST
Traditional Chinese Simplified Chinese

Marine Forecast

Weather Information for the Marine Community

Bulletin issued at 09:00 HKT 04/Sep/2016

N0 WARNING.

GENERAL SITUATION AT 032100 UTC:
TROUGH 21N 110E 23N 117E QSTNR.

MARINE FORECAST FOR 24 HOURS FROM 040100 UTC:

HONG KONG= E TO SE 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL SW UP TO 2 M. TEMP 30-27 C. =
KWANGTUNG= SW 4-5, SE UP TO 6 IN E AT FIRST. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 3 M AT FIRST. SWELL SW UP TO 2 M. =
TAIWAN STRAIT= E TO NE 4-5, OCNL 6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 3 M. SWELL SW UP TO 2 M. =
BASHI= W TO SW 5-6, OCNL 7. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL SW 2 M. =
PRATAS= SW 4-5. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL SW 2 M. =
BALINTANG= W TO SW 5-6, OCNL 7. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL SW 2 M. =
SCARBOROUGH= SW 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL SW 2 M. =
PARACEL= SW 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL SW 2 M. =
TONKIN= SW 4-5, UP TO 6 AT FIRST. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 3 M AT FIRST. =
DANANG= SW 4-5. DOWN TO 2000 M IN SCT 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.


  • Map showing the 10 forecast areas
  • Tidal Information

    • 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 12:30 HKT 04/Sep/2016

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 12:30 p.m. on 04 September 2016

    Weather Situation:
    A trough of low pressure is bringing unsettled weather to the south China coastal waters.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East to southeast force 4 to 5.
    Isolated squally showers and thunderstorms.
    Moderate seas.

    Nan'ao and Shanwei:
    Southeast force 4 to 5.
    Scattered squally showers and thunderstorms.
    Moderate seas.

    South of Hong Kong and Shangchuan Dao:
    Southwest force 4 to 5.
    Scattered squally showers and thunderstorms.
    Moderate seas.

    Outlook for the next 48 hours
    Southwesterly winds of force 4 to 5, southeasterly winds of force 4 to 5 in east. Scattered squally showers and thunderstorms.

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

    Waglan Island Wind east-northeast force 5
      Visibility 7 Kilometres

    Shantou Wind south-southwest force 1
      Visibility 8 Kilometres

    Dongsha Wind southwest force 2
      Visibility 10 Kilometres

    Huangmaozhou Wind east-northeast force 4

    Macau Wind north-northeast force 1
      Visibility 8 Kilometres

    Xisha Wind southwest force 3
      Visibility 27 Kilometres

  • Explanation of Seas or Sea Waves
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    • WEATHER FORECAST FOR LOCAL AVIATION
    Traditional Chinese Simplified Chinese

    Weather Forecast for Local Aviation

    Bulletin issued at 09:00 HKT 04/SEP/2016
    (Next update at 17:30 HKT 04/SEP/2016)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.

II.  SYNOPSIS OF THE WEATHER SITUATION :
     A TROUGH OF LOW PRESSURE IS BRINGING UNSETTLED
     WEATHER TO THE SOUTH CHINA COASTAL AREAS.

III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  090/10
                  TEMPO VRB/15G25 IN TS
       OFFSHORE:  090/15                               28-31
   B.   2000 FT:  110/15                               23
   C.   5000 FT:  160/10                               19
   D.  10000 FT:  240/10 BEC 100/10                    12
   E.  18000 FT:  090/15                               MS1
   F.  24000 FT:  090/15                               MS11
   G.  30000 FT:  050/20                               MS24
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY WITH A FEW SHOWERS AND
      THUNDERSTORMS.  SUNNY INTERVALS DURING THE DAY.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT  SCT 3000 FT.  TEMPO FEW CB 1000 FT
      SCT 2000 FT  BKN 4000 FT.
   K. VISIBILITY    : 7 KM.  TEMPO 3000 M IN SHOWERS.
                      TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 17500 FT      10 DEG. C LEVEL(S) : 12000 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS.
                      MOD OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 1.5 M         SEA TEMPERATURE    : 27 DEG

IV.  FURTHER OUTLOOK: 
     MODERATE EAST TO SOUTHEASTERLY WINDS.  MAINLY
     CLOUDY WITH A FEW SHOWERS AND THUNDERSTORMS.=

    ===================================================================
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 10:30 HKT on 04 Sep 16

    VHHK SIGMET 1 VALID 040230/040630 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1912 E11148 - N1918 E11136 - N2148 E11218 - N2336 E11730 - N2100 E11730 - N1654 E11412 - N1912 E11148 TOP FL450 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

    Tropical Cyclone Warning |  Track and Positions of Tropical Cyclones
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    South China Coastal Waters |  Marine Forecast
    Severe Weather Information Centre

    Bulletin issued at 21:30 HKT 19/Aug/2016


    Tropical Cyclone Warning

    At 191200 UTC, Tropical Storm Dianmu (1608) with central pressure 988 hectopascals was centred within 60 nautical miles of two zero point eight degrees north (20.8 N) one zero five point four degrees east (105.4 E) and is forecast to weaken and move west at about 14 knots for the next 24 hours.

    Maximum winds near the centre are estimated to be 35 knots.

    Radius of over 33 knot winds 60 nautical miles over eastern semicircle, 30 nautical miles elsewhere.
    Radius of over 2 metre waves 150 nautical miles.

    No further warnings on this Tropical Storm will be issued by the Hong Kong Observatory unless re-intensification takes place.

    Forecast position and intensity at 201200 UTC
    Dissipated over land.



    The Hong Kong Observatory's tropical cyclone warnings for shipping are issued about one and a half hours after the time of observation. They incorporate additional information derived from surface and upper-air data and may therefore be slightly different from the real-time satellite or radar-based positions given in the hourly bulletins for public.

    While the forecast positions and track indicate the most likely future path of the tropical cyclone, they may deviate from the actual path taken by the storm.

    Tropical Cyclone Track
    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 04/Sep/2016 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     31.2 C
Minimum Air Temperature                     25.7 C
Grass Minimum Temperature                   26.0 C
Relative Humidity                        74 - 98 Percent
Rainfall                                     7.0 mm 
Total rainfall since 1st January          2023.4 mm
Against an average of                     1940.1 mm

Other Stations                Min                  Max
King's Park                  24.8 C               31.0 C
Wong Chuk Hang               25.4 C               30.3 C
Ta Kwu Ling                  26.0 C               32.1 C
Lau Fau Shan                 25.7 C               32.0 C
Tai Po                       25.7 C               29.6 C
Sha Tin                      25.3 C               31.8 C
Tuen Mun                     26.1 C               32.3 C
Tseung Kwan O                25.1 C               30.9 C
Sai Kung                     25.9 C               29.4 C
Cheung Chau                  24.7 C               29.3 C
Chek Lap Kok                 26.9 C               33.3 C
Tsing Yi                     24.6 C               31.8 C
Shek Kong                    26.1 C               32.7 C
Tsuen Wan Ho Koon            25.0 C               29.3 C
Tsuen Wan Shing Mun Valley   25.0 C               31.4 C
Hong Kong Park               25.0 C               30.2 C
Shau Kei Wan                 25.2 C               30.1 C
Kowloon City                 24.4 C               31.3 C
Happy Valley                 25.5 C               31.5 C
Wong Tai Sin                 25.0 C               31.9 C
Stanley                      25.2 C               29.9 C
Kwun Tong                    25.2 C               32.2 C
Sham Shui Po                 24.7 C               31.8 C
Kai Tak Runway Park          25.6 C               30.7 C
Yuen Long Park               25.8 C               32.0 C

Duration of sunshine (King's Park):              1.2 H
The mean UV index recorded at King's Park yesterday was 2,
the UV intensity was Low.
The maximum UV index for yesterday was 7.
Sea surface temperature (Waglan Island):        28.9 C 

Yesterday's (03 Sep 2016) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.08 to
0.15 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                           0.08
Tap Mun                             0.09
Kat O                               0.09
Yuen Ng Fan                         0.12
Tai Mei Tuk                         0.13
Sha Tau Kok                         0.10
Kwun Tong                           0.12
Sai Wan Ho                          0.09
King's Park                         0.14
Tsim Bei Tsui                       0.13
Cape D'Aguilar                      0.13
Chek Lap Kok                        0.15

Note

      

    1. From readings taken at various locations in Hong Kong during
the period 1987-2015, the background ambient gamma radiation
levels may vary between 0.06 and 0.30 microsievert per hour.

    2. The extent of health effects to a person as a result of
exposure to radiation is expressed by a physical quantity
called equivalent dose, in unit of sievert.  Protective
action may be required if there is an increase in the
ambient gamma dose rate above background such that the total
additional dose is expected to exceed 5000 microsieverts in
a relatively short period of time. For example, a dose of
5000 microsieverts may be reached when the ambient gamma
dose rate is 1000 microsieverts per hour (several thousand
times above background) and lasts for 5 hours.

    3. The readings of ambient gamma radiation level from
instrument are expressed in unit of gray, which is
numerically equal to the gamma dose expressed in sievert.
    Climatological Information for 03 Sep
     2003copy right image | Important notices | Privacy policy Last revision date: <04 Sep 2016> 

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