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Weather Information for South China Coastal Waters

Bulletin issued at 17:16 HKT 09/Aug/2018

At 5 p.m. at the Hong Kong Observatory the air temperature was 32 degrees Celsius and the relative humidity 66 per cent.
During the past hour the mean UV Index recorded at King's Park was 2. The intensity of UV radiation was low.

Please be reminded that:

The Tropical Cyclone Signal No. 1 was issued at 5:15 p.m.
The Very Hot Weather Warning is now in force. Very hot weather might cause adverse health effects. Members of the public should take care to avoid heatstroke.

The air temperatures at other places were:

King's Park 31 degrees;
Wong Chuk Hang 32 degrees;
Ta Kwu Ling 32 degrees;
Lau Fau Shan 31 degrees;
Tai Po 31 degrees;
Sha Tin 31 degrees;
Tuen Mun 32 degrees;
Tseung Kwan O 31 degrees;
Sai Kung 31 degrees;
Cheung Chau 30 degrees;
Chek Lap Kok 33 degrees;
Tsing Yi 32 degrees;
Tsuen Wan Ho Koon 29 degrees;
Tsuen Wan Shing Mun Valley 31 degrees;
Hong Kong Park 31 degrees;
Shau Kei Wan 30 degrees;
Happy Valley 32 degrees;
Wong Tai Sin 31 degrees;
Stanley 31 degrees;
Kwun Tong 31 degrees;
Sham Shui Po 32 degrees;
Kai Tak Runway Park 31 degrees;
Yuen Long Park 32 degrees;
Tai Mei Tuk 30 degrees.

Here is the information on Tropical Depression:
Location: 17.9 degrees north, 111.9 degrees east; Maximum sustained wind near its centre: 45 km/h.


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


Climatological Information for 9 Aug

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Local Weather Forecast

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

Current Weather | Regional Temperature Forecast in HK |  9-day Weather Forecast
UV Index Forecast |  Weather Information for South China Coastal Waters

Bulletin updated at 17:20 HKT 09/Aug/2018

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

Weather forecast for tonight and tomorrow

Mainly cloudy with squally showers and isolated thunderstorms. Temperatures will range between 27 and 31 degrees tomorrow. Moderate to fresh east to southeasterly winds, occasionally strong offshore and on high ground.

Outlook : The weather will be unsettled with squally showers and thunderstorms over the weekend.


(The above forecast period is valid up to 23:59 HKT tomorrow, 10/08/2018; 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 09:00 HKT 09/Aug/2018

N0 WARNING.

GENERAL SITUATION AT 082100 UTC:
LOW 998HPA 17N 113E N SLOWLY INTSF SLOWLY.

MARINE FORECAST FOR 24 HOURS FROM 090100 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 33-26 C. =
KWANGTUNG= E 5-6, OCNL 7 IN W. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M, UP TO 4 M IN W. SWELL S 2 M, E 2 M. =
TAIWAN STRAIT= SE 4, OCNL 5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
BASHI= SW 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL S 2-3 M. =
PRATAS= S 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL S 2-3 M. =
BALINTANG= SW 4-5, OCNL 6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 3 M. SWELL S 2-3 M. =
SCARBOROUGH= S 5-6, OCNL 7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL S 2-3 M. =
PARACEL= E TO NE 5-6, OCNL 7, S 6-7 LATER. DOWN TO 1000 M IN SCT HEAVY SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL S TO SW 2 M. =
TONKIN= N TO NE 4-5, OCNL 6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 3 M. =
DANANG= W 5-6, OCNL 7. DOWN TO 1000 M IN SCT HEAVY SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL S 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 17:30 HKT 09/Aug/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 5:30 p.m. on 09 August 2018

    Warnings:
    Strong winds in all areas.

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

    Besides, the area of low pressure over the central and northern parts of the South China Sea has intensified into a tropical depression. At 5 p.m., the tropical depression with maximum sustained winds of about 45 kilometres per hour near its centre was located near 17.9 degrees north, 111.9 degrees east. It is forecast to move north-northwest at about 12 kilometres per hour in the general direction towards the vicinity of the coast of western Guangdong and Hainan Island.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East to southeast force 6 to 7.
    Isolated squally showers and thunderstorms.
    Rough seas.

    Nan'ao:
    East to southeast force 4 to 5, occasionally force 6.
    Isolated squally showers and thunderstorms.
    Moderate to rough seas.

    Shanwei:
    East to southeast force 5 to 6.
    Isolated squally showers and thunderstorms.
    Moderate to rough seas.

    South of Hong Kong:
    East to southeast force 6 to 7.
    Scattered squally showers and thunderstorms.
    Rough seas.

    Shangchuan Dao:
    East to southeast force 6 to 7, cyclonic force 6 to 7 in south at first.
    Scattered squally showers and thunderstorms.
    Rough seas.

    Outlook for the next 48 hours
    South to southeasterly winds of force 6 to 7. Scattered heavy squally showers and thunderstorms.

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

    Waglan Island Wind east force 6
      Visibility 13 Kilometres

    Shantou Wind east-northeast force 2
      Visibility 30 Kilometres

    Dongsha Wind south force 3
      Visibility 10 Kilometres

    Huangmaozhou Wind east force 7

    Macau Wind east force 3
      Visibility 25 Kilometres

    Xisha Wind west-southwest force 5
      Visibility 9 Kilometres in showers

  • 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
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    Weather Forecast for Local Aviation

    Bulletin issued at 12:30 HKT 09/AUG/2018
    (Next update at 17:30 HKT 09/AUG/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS AND SEV TURB.
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AN EASTERLY AIRSTREAM IS AFFECTING THE SOUTH
     CHINA COASTAL AREAS.  BESIDES, A BROAD AREA OF
     LOW PRESSURE OVER THE CENTRAL PART OF THE SOUTH
     CHINA SEA IS BRINGING UNSETTLED WEATHER TO THE
     REGION.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1300 TO 2300 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  090/10-15
                  TEMPO VRB/20G30 IN TS
       OFFSHORE:  090/20-25, OCNL 30                   35-28
   B.   2000 FT:  100/20-25                            25
   C.   5000 FT:  110/25                               20
   D.  10000 FT:  110/20                               12
   E.  18000 FT:  100/15                               MS1
   F.  24000 FT:  090/15                               MS11
   G.  30000 FT:  070/15                               MS24
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY FINE APART FROM ISOLATED SHOWERS AND
      THUNDERSTORMS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT  SCT 4000 FT.  TEMPO FEW CB 1000 FT
      SCT 2000 FT  BKN 4000 FT.
   K. VISIBILITY    : 10 KM.  TEMPO 4000 M IN SHOWERS.
                      TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 17500 FT      10 DEG. C LEVEL(S) : 12200 FT
   M. TURBULENCE    : MOD TO SEV.
   N. SEA STATE     : 2.5-3.5 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH EAST TO SOUTHEASTERLY WINDS,
     OCCASIONALLY STRONG OFFSHORE.  MAINLY CLOUDY
     WITH SHOWERS AND ISOLATED SQUALLY 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 16:50 HKT on 09 Aug 18

    VHHK SIGMET 2 VALID 090450/090850 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2100 E11730 - N1642 E11400 - N1930 E11130 - N2112 E11130 - N2136 E11448 - N2142 E11730 - N2100 E11730 TOP FL450 MOV WNW 10KT NC= VHHK SIGMET 3 VALID 090850/091250 VHHH- VHHK HONG KONG FIR EMBD TS FCST S OF N2230 TOP FL450 MOV W 15KT NC=

    Please click here for more about the SIGMET

    TROPICAL CYCLONE WARNING Skip to main content
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    Tropical Cyclone Warnings

    Bulletin issued at 17:20 HKT 09/Aug/2018

    Tropical Cyclone Warning Bulletin

    Here is the latest Tropical Cyclone Warning Bulletin issued by the Hong Kong Observatory.

    The Standby Signal, No. 1 was issued at 5:15 p.m.

    This means that a tropical cyclone now centred within about 800 kilometres of Hong Kong may affect us.

    The area of low pressure over the central and northern parts of the South China Sea has intensified into a tropical depression.

    At 5 p.m., the tropical depression was estimated to be about 540 kilometres south-southwest of Hong Kong (near 17.9 degrees north 111.9 degrees east) and is forecast to move north-northwest at about 12 kilometres per hour in the general direction towards the vicinity of the coast of western Guangdong to Hainan Island.

    The area of low pressure over the central and northern parts of the South China Sea has intensified into a tropical depression this afternoon.

    According to the present forecast track, the tropical depression will keep a distance of about 500 kilometres from Hong Kong tonight. The chance of issuing the Strong Wind Signal, No. 3 is not high tonight.

    The outer rain bands associated with the tropical depression will affect Hong Kong in the next couple of days. There will be occasional squally showers and thunderstorms. Winds will be occasionally strong over offshore waters and on high ground.

    (Precautionary Announcements with No. 1 Signal)

    1. Every precaution should be taken. Objects likely to be blown away should be secured or taken indoors. Check if all windows and doors can be securely locked.

    2. Drains should be cleared of leaves and rubbish. People in low-lying areas should take precautions against flooding.

    3. Those who have duties during a tropical cyclone should now remain on call.

    4. People planning to visit Guangdong, Macau, outlying islands or remote parts of Hong Kong should note that changes in weather may affect your trips.

    5. There may be swells, you are advised to stay away from the shoreline.

    6. Fishing vessels and low power vessels in open sea should seek shelter as soon as possible and be secured properly with moorings.

    7. Construction and property management practitioners should make sure that overhanging facilities and temporary structures outdoors are securely fastened, and should take precautionary measures.

    8. Listen to radio, watch TV or browse the Hong Kong Observatory's website and mobile app for the latest information on the tropical cyclone.
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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 09/Aug/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     33.9 C
Minimum Air Temperature                     27.1 C
Grass Minimum Temperature                   28.3 C
Relative Humidity                        61 - 89 Percent
Rainfall                                     0.5 mm 
Total rainfall since 1st January           989.7 mm
Against an average of                     1575.3 mm

Other Stations                Min                  Max
King's Park                  26.5 C               32.4 C
Wong Chuk Hang               26.3 C               33.2 C
Ta Kwu Ling                  25.1 C               34.0 C
Lau Fau Shan                 23.9 C               33.7 C
Tai Po                       25.7 C               32.8 C
Sha Tin                      26.0 C               33.2 C
Tuen Mun                     25.0 C               32.3 C
Tseung Kwan O                25.0 C               32.5 C
Sai Kung                     25.9 C               32.5 C
Cheung Chau                  26.2 C               32.5 C
Chek Lap Kok                 27.0 C               36.1 C
Tsing Yi                     24.9 C               33.7 C
Tsuen Wan Ho Koon            23.9 C               31.9 C
Tsuen Wan Shing Mun Valley   24.3 C               32.4 C
Hong Kong Park               25.3 C               33.0 C
Shau Kei Wan                 25.6 C               32.6 C
Kowloon City                 25.7 C               33.0 C
Happy Valley                 25.9 C               33.6 C
Wong Tai Sin                 25.6 C               33.0 C
Stanley                      27.8 C               33.2 C
Kwun Tong                    26.4 C               32.2 C
Sham Shui Po                 25.2 C               33.8 C
Kai Tak Runway Park          27.1 C               32.1 C
Yuen Long Park               24.1 C               34.8 C
Tai Mei Tuk               25.8 C               33.3 C

Duration of sunshine (King's Park):              8.6 H
The mean UV index recorded at King's Park yesterday was 5,
the UV intensity was Moderate.
The maximum UV index for yesterday was 10.
 

Yesterday's (08 Aug 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                             0.09
Kat O                               0.10
Yuen Ng Fan                         0.12
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 08 Aug
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