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Bulletin issued at 03:02 HKT 03/Sep/2016

At 3 a.m. at the Hong Kong Observatory the air temperature was 27 degrees Celsius and the relative humidity 90 per cent.

An area of intense thundery showers is affecting Hong Kong. More than 20 millimetres of rainfall was recorded over the southern part of the Lantau Island in the past hour. Members of the public should stay alert.

Please be reminded that:

The Thunderstorm Warning has been issued. It will remain effective until 4:00 a.m. today. A few thunderstorms are expected to occur over Hong Kong.

The air temperatures at other places were:

King's Park 27 degrees;
Wong Chuk Hang 26 degrees;
Ta Kwu Ling 27 degrees;
Lau Fau Shan 27 degrees;
Tai Po 27 degrees;
Sha Tin 26 degrees;
Tuen Mun 27 degrees;
Tseung Kwan O 26 degrees;
Sai Kung 27 degrees;
Cheung Chau 25 degrees;
Chek Lap Kok 29 degrees;
Tsing Yi 26 degrees;
Shek Kong 27 degrees;
Tsuen Wan Ho Koon 26 degrees;
Tsuen Wan Shing Mun Valley 26 degrees;
Hong Kong Park 26 degrees;
Shau Kei Wan 26 degrees;
Kowloon City 27 degrees;
Happy Valley 27 degrees;
Wong Tai Sin 26 degrees;
Stanley 26 degrees;
Kwun Tong 27 degrees;
Sham Shui Po 27 degrees;
Kai Tak Runway Park 27 degrees;
Yuen Long Park 27 degrees.

Between 1:45 and 2:45 a.m., lightning was detected within Lantau. The rainfall recorded in various regions were:

Islands District 0 to 24 mm;
Southern District 0 to 2 mm;
Kwai Tsing 0 to 2 mm;
Yuen Long 0 to 2 mm;
Central & Western District 0 to 1 mm;
Tuen Mun 0 to 1 mm.


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


Climatological Information for 3 Sep

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


Local Weather Forecast
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Bulletin updated at 02:50 HKT 03/Sep/2016

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

A trough of low pressure is bringing thundery showers to the south China coastal areas.

At 2 a.m., Severe Typhoon Namtheun was centred about 350 kilometres south of Kagoshima. It is forecast to move north at about 12 kilometres per hour in the general direction of Kyushu of Japan.

Weather forecast for today

Mainly cloudy with showers and a few thunderstorms. Showers will be heavy at times at first. Showers will ease off with sunny intervals later. Temperatures will range between 26 and 31 degrees. Light to moderate southwesterly winds.

Outlook : Weather remaining unsettled early next week.


(The above forecast period is valid up to 23:59 HKT today, 03/09/2016; 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 21:00 HKT 02/Sep/2016

N0 WARNING.

GENERAL SITUATION AT 020900 UTC:
TROUGH 21N 109E 23N 113E 24N 117E S SLOWLY.

MARINE FORECAST FOR 24 HOURS FROM 021300 UTC:

HONG KONG= SW 4-5. DOWN TO 1000 M IN SHOWERS AND SQUALLY TS. SEA UP TO 3 M. TEMP 27-31 C. =
KWANGTUNG= SW 4-5. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
TAIWAN STRAIT= SW 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL SW UP TO 2 M. =
BASHI= W TO SW 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL SW 2 M. =
PRATAS= SW 5, OCNL 6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2 M. SWELL SW UP TO 2 M. =
BALINTANG= W TO SW 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL SW 2 M. =
SCARBOROUGH= SW 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL SW UP TO 2 M. =
PARACEL= SW 4-5, OCNL 6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2 M. SWELL SW UP TO 2 M. =
TONKIN= SW 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
DANANG= SW 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.


  • Map showing the 10 forecast areas
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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 03:30 HKT 03/Sep/2016

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 3:30 a.m. on 03 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:
    Southwest force 4 to 5.
    Showers and a few squally thunderstorms.
    Moderate seas.

    Nan'ao, Shanwei, 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. Isolated squally showers and thunderstorms.

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

    Waglan Island Wind south-southwest force 2
      Visibility 10 Kilometres

    Shantou Wind east-southeast force 1
      Visibility 20 Kilometres

    Dongsha Wind southwest force 4
      Visibility 9 Kilometres

    Huangmaozhou Wind southwest force 2

    Macau Wind west force 1
      Visibility 26 Kilometres

    Xisha Wind southwest force 4
      Visibility 28 Kilometres

  • Explanation of Seas or Sea Waves
  • Explanation of Swells
  • Descriptive Terms of Wind Speeds
  • Visibility Readings in Hong Kong Waters
  • Map showing forecast areas
  • Tidal Information

    • WEATHER FORECAST FOR LOCAL AVIATION
    Traditional Chinese Simplified Chinese

    Weather Forecast for Local Aviation

    Bulletin issued at 01:30 HKT 03/SEP/2016
    (Next update at 9:00-9:30 HKT 03/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 THUNDERY
     SHOWERS TO THE SOUTH CHINA COASTAL AREAS.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  220/5-10
                  TEMPO VRB/20G30 IN TS
       OFFSHORE:  220/10-15                            28-32
   B.   2000 FT:  230/10-15, OCNL 20                   24
   C.   5000 FT:  260/15, OCNL 20                      21
   D.  10000 FT:  250/15                               12
   E.  18000 FT:  270/10                               MS2
   F.  24000 FT:  080/10                               MS12
   G.  30000 FT:  070/20                               MS26
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY WITH SHOWERS AND A FEW SQUALLY
      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    : 10 KM.  TEMPO 3000 M IN SHOWERS.  TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 17000 FT      10 DEG. C LEVEL(S) : 11500 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS. MOD OFFSHORE AND ON HIGH GROUNDS.
   N. SEA STATE     : 1.0-1.5 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     LIGHT TO MODERATE SOUTHWESTERLY WINDS.  MAINLY
     CLOUDY WITH ISOLATED SHOWERS AND THUNDERSTORMS.
     SUNNY INTERVALS 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 02:25 HKT on 03 Sep 16

    VHHK SIGMET 5 VALID 021825/022225 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2100 E11730 - N1900 E11548 - N1742 E11306 - N1912 E11148 - N2230 E11348 - N2342 E11730 - N2100 E11730 TOP FL450 MOV ENE 10KT 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
    Current Weather |  Local Weather Forecast |  9-day Weather Forecast
    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 03/Sep/2016 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     31.0 C
Minimum Air Temperature                     27.5 C
Grass Minimum Temperature                   27.0 C
Relative Humidity                        75 - 92 Percent
Rainfall                                     6.1 mm 
Total rainfall since 1st January          2016.4 mm
Against an average of                     1929.1 mm

Other Stations                Min                  Max
King's Park                  26.7 C               30.9 C
Wong Chuk Hang               26.2 C               30.6 C
Ta Kwu Ling                  26.5 C               32.9 C
Lau Fau Shan                 26.9 C               32.4 C
Tai Po                       26.9 C               31.0 C
Sha Tin                      26.1 C               31.6 C
Tuen Mun                     27.0 C               31.8 C
Tseung Kwan O                26.2 C               30.4 C
Sai Kung                     26.8 C               32.1 C
Cheung Chau                  25.7 C               30.1 C
Chek Lap Kok                 27.8 C               32.4 C
Tsing Yi                     26.4 C               30.7 C
Shek Kong                    26.6 C               32.5 C
Tsuen Wan Ho Koon            25.6 C               29.4 C
Tsuen Wan Shing Mun Valley   26.2 C               31.0 C
Hong Kong Park               26.3 C               30.8 C
Shau Kei Wan                 25.9 C               31.3 C
Kowloon City                 26.2 C               32.1 C
Happy Valley                 26.7 C               31.5 C
Wong Tai Sin                 26.7 C               32.1 C
Stanley                      25.4 C               29.6 C
Kwun Tong                    26.6 C               31.2 C
Sham Shui Po                 26.2 C               31.6 C
Kai Tak Runway Park          26.9 C               31.3 C
Yuen Long Park               27.2 C               32.8 C

Duration of sunshine (King's Park):              0.5 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 8.
Sea surface temperature (Waglan Island):        27.9 C 

Yesterday's (02 Sep 2016) 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                           0.08
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                        0.14

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 02 Sep
     2003copy right image | Important notices | Privacy policy Last revision date: <03 Sep 2016> 

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