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Weather Information for South China Coastal Waters

Bulletin issued at 09:02 HKT 21/Jun/2017

At 9 a.m. at the Hong Kong Observatory the air temperature was 27 degrees Celsius and the relative humidity 95 per cent.
During the past hour the mean UV Index recorded at King's Park was 0.7. The intensity of UV radiation was low.

Gusts reaching 70 kilometres per hour or above may continue to affect Hong Kong.

Please be reminded that:

The Thunderstorm Warning has been issued. It will remain effective until 10:30 a.m. today. Isolated squally thunderstorms are expected to occur over Hong Kong.

The air temperatures at other places were:

King's Park 26 degrees;
Ta Kwu Ling 28 degrees;
Lau Fau Shan 29 degrees;
Tai Po 26 degrees;
Sha Tin 27 degrees;
Tuen Mun 28 degrees;
Tseung Kwan O 25 degrees;
Sai Kung 26 degrees;
Cheung Chau 26 degrees;
Chek Lap Kok 28 degrees;
Tsing Yi 27 degrees;
Shek Kong 29 degrees;
Tsuen Wan Ho Koon 26 degrees;
Tsuen Wan Shing Mun Valley 26 degrees;
Hong Kong Park 26 degrees;
Shau Kei Wan 25 degrees;
Kowloon City 26 degrees;
Happy Valley 27 degrees;
Wong Tai Sin 26 degrees;
Stanley 25 degrees;
Kwun Tong 26 degrees;
Sham Shui Po 27 degrees;
Kai Tak Runway Park 26 degrees;
Yuen Long Park 29 degrees;
Tai Mei Tuk 26 degrees.

Between 7:45 and 8:45 a.m., lightning was detected within Lantau, New Territories East, Hong Kong and Kowloon. The rainfall recorded in various regions were:

Southern District 0 to 23 mm;
Islands District 0 to 22 mm;
Eastern District 0 to 17 mm;
Sai Kung 0 to 14 mm;
Tsuen Wan 0 to 13 mm;
Tai Po 0 to 10 mm;
Kwai Tsing 2 to 7 mm;
Sha Tin 1 to 4 mm;
Kwun Tong 0 to 4 mm;
North District 0 to 3 mm;
Wan Chai 0 to 3 mm;
Central & Western District 0 to 3 mm;
Yau Tsim Mong 1 to 2 mm;
Kowloon City 1 to 2 mm;
Wong Tai Sin 0 to 1 mm.

Between midnight and 9 a.m. the minimum temperature was 25.2 degrees Celsius at the Hong Kong Observatory.


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


Climatological Information for 21 Jun

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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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 08:45 HKT 21/Jun/2017

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

Under the influence of a trough of low pressure, areas of thundery showers continue to develop over the coastal waters of Guangdong and move closer to the vicinity of the Pearl River Estuary.

Weather forecast for today

Mainly cloudy with showers. Showers will be heavy at times in the morning with a few squally thunderstorms. Showers will ease off gradually during the day and there will be bright periods. The maximum temperature will be about 30 degrees. Moderate south to southwesterly winds, occasionally fresh offshore.

Outlook : Hot with sunny periods in the next few days.


(The above forecast period is valid up to 23:59 HKT today, 21/06/2017; 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 21/Jun/2017

N0 WARNING.

GENERAL SITUATION AT 202100 UTC:
TROUGH 22N 108E 22N 113E 29N 125E QSTNR.

MARINE FORECAST FOR 24 HOURS FROM 210100 UTC:

HONG KONG= S TO SW 4-5, OCNL 6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS AT FIRST. SEA UP TO 3 M. TEMP 30-28 C. =
KWANGTUNG= S TO SW 4-5, OCNL 6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS AT FIRST. SEA UP TO 3 M. SWELL SW UP TO 2 M. =
TAIWAN STRAIT= SW 5-6. ISOL SHOWERS AND TS. SEA UP TO 3 M. SWELL SW UP TO 2 M. =
BASHI= S TO SW 4-5, OCNL 6. FINE. SEA UP TO 3 M. SWELL SW UP TO 2 M. =
PRATAS= S TO SW 4-5, OCNL 6 IN N. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS IN N AT FIRST. SEA UP TO 3 M. SWELL SW UP TO 2 M. =
BALINTANG= S TO SW 4-5. FINE. SEA UP TO 2 M. SWELL SW UP TO 2 M. =
SCARBOROUGH= S 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
PARACEL= S TO SW 4-5, OCNL 6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS IN N AT FIRST. SEA UP TO 3 M. =
TONKIN= S 4-5, OCNL 6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 3 M. =
DANANG= S 4-5. ISOL 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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  • 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 09:30 HKT 21/Jun/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 21 June 2017

    Warnings:
    Strong winds in all areas.

    Weather Situation:
    The unsettled weather associated with a trough of low pressure is affecting the south China coastal waters.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    South to southwest force 4 to 5, occasionally force 6.
    Isolated squally showers and thunderstorms at first. Showers will be heavy at times.
    Moderate to rough seas.

    Nan'ao, Shanwei, South of Hong Kong and Shangchuan Dao:
    South to southwest force 4 to 5, occasionally force 6.
    Isolated squally showers and thunderstorms at first.
    Moderate to rough seas.

    Outlook for the next 48 hours
    Southerly winds of force 4 to 5. Isolated showers and thunderstorms.

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

    Waglan Island Wind south-southwest force 6
      Visibility 6 Kilometres

    Shantou Wind south force 2
      Visibility 24 Kilometres

    Dongsha Wind south force 2
      Visibility 10 Kilometres

    Huangmaozhou Wind south-southwest force 5

    Macau Wind southwest force 1
      Visibility 10 Kilometres in thunderstorms

    Xisha Wind south force 3
      Visibility 19 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 09:00 HKT 21/JUN/2017
    (Next update at 17:30 HKT 21/JUN/2017)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
     STRONG WINDS AND SEV TURB.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THE UNSETTLED WEATHER ASSOCIATED WITH A TROUGH
     OF LOW PRESSURE IS AFFECTING 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:  200/10
                  TEMPO VRB/20G30 IN TS
       OFFSHORE:  200/15-20                            27-31
   B.   2000 FT:  210/20-25                            24
   C.   5000 FT:  220/25                               19
   D.  10000 FT:  230/25                               12
   E.  18000 FT:  230/25                               MS2
   F.  24000 FT:  240/25                               MS12
   G.  30000 FT:  260/15                               MS25
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY WITH SHOWERS.  SHOWERS WILL BE
      HEAVY AT TIMES IN THE MORNING WITH A FEW
      SQUALLY THUNDERSTORMS.  SHOWERS WILL EASE OFF
      GRADUALLY DURING THE DAY AND THERE WILL BE
      BRIGHT PERIODS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT  SCT 3000 FT.  TEMPO FEW CB 1000 FT
      SCT 2000 FT  BKN 4000 FT.
   K. VISIBILITY    : 8 KM.  TEMPO 3000 M IN SHOWERS.
                      TEMPO 1500 M IN TS.
   L. 0 DEG. C LEVEL: 17000 FT      10 DEG. C LEVEL(S) : 11000 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS AND NEAR HILLS.
                      MOD OFFSHORE.
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE SOUTHERLY WINDS.  MAINLY CLOUDY WITH A
     FEW SHOWERS.=

    ===================================================================
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 07:30 HKT on 21 Jun 17

    VHHK SIGMET 7 VALID 202030/202330 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2230 E11342 - N2230 E11342 - N2342 E11730 - N2212 E11730 - N2036 E11324 - N2230 E11342 TOP FL400 MOV NE 10KT NC= VHHK SIGMET 8 VALID 202330/210330 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2206 E11300 - N2230 E11342 - N2342 E11730 - N2236 E11730 - N2112 E11300 - N2206 E11300 TOP FL400 MOV NE 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

    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 21/Jun/2017 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     28.2 C
Minimum Air Temperature                     25.2 C
Grass Minimum Temperature                   24.6 C
Relative Humidity                        80 - 98 Percent
Rainfall                                    24.8 mm 
Total rainfall since 1st January          1059.5 mm
Against an average of                      944.7 mm

Other Stations                Min                  Max
King's Park                  25.1 C               28.0 C
Ta Kwu Ling                  24.2 C               28.3 C
Lau Fau Shan                 24.6 C               27.1 C
Tai Po                       24.5 C               27.5 C
Sha Tin                      24.8 C               28.2 C
Tuen Mun                     24.9 C               27.1 C
Tseung Kwan O                24.4 C               27.6 C
Sai Kung                     25.0 C               27.6 C
Cheung Chau                  24.8 C               26.9 C
Chek Lap Kok                 25.7 C               30.1 C
Tsing Yi                     24.7 C               27.3 C
Shek Kong                    24.5 C               28.5 C
Tsuen Wan Ho Koon            23.9 C               25.8 C
Tsuen Wan Shing Mun Valley   24.3 C               26.9 C
Hong Kong Park               24.5 C               27.9 C
Shau Kei Wan                 24.7 C               28.3 C
Kowloon City                 24.8 C               27.5 C
Happy Valley                 24.7 C               28.3 C
Wong Tai Sin                 24.3 C               27.5 C
Stanley                      24.7 C               27.0 C
Kwun Tong                    24.9 C               28.0 C
Sham Shui Po                 25.0 C               27.4 C
Kai Tak Runway Park          25.3 C               28.5 C
Yuen Long Park               24.5 C               27.8 C
Tai Mei Tuk               24.6 C               26.8 C

Duration of sunshine (King's Park):              0.2 H
The mean UV index recorded at King's Park yesterday was 1,
the UV intensity was Low.
The maximum UV index for yesterday was 3.
 

Yesterday's (20 Jun 2017) 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                         0.12
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 1987-2016, 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 20 Jun
     2003copy right image | Important notices | Privacy policy Last revision date: <21 Jun 2017> 

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