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

At 9 p.m. at the Hong Kong Observatory the air temperature was 27 degrees Celsius and the relative humidity 80 per cent.

The air temperatures at other places were:

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


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


Climatological Information for 9 May

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


Local Weather Forecast
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Bulletin updated at 20:45 HKT 09/May/2017

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

The ridge of high pressure over the western North Pacific is extending westwards gradually. The cloud band covering southeastern China will thin out.

Weather forecast for tonight and tomorrow

Visibility relatively low in some areas. Cloudy periods overnight with a minimum temperature of about 25 degrees. Mainly fine and hot apart from one or two showers during the day tomorrow. The maximum temperature will be around 30 degrees. Light winds.

Outlook : Mainly fine and hot in the following couple of days. The weather will be unsettled over the weekend and early next week.


(The above forecast period is valid up to 23:59 HKT tomorrow, 10/05/2017; Regular update at : around 45 minutes past each hour, 16:15 HKT and 23:15 HKT)

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Marine Weather Information and Forecast

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MARINE FORECAST
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Marine Forecast

Weather Information for the Marine Community

Bulletin issued at 21:00 HKT 09/May/2017

N0 WARNING.

GENERAL SITUATION AT 090900 UTC:
AN EASTERLY AIRSTREAM IS GENERALLY AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 091300 UTC:

HONG KONG= E 3-4. DOWN TO 4000 M IN MIST PATCHES. ISOL SHOWERS LATER. TEMP 25-30 C. =
KWANGTUNG= E 3-4. ISOL SHOWERS AND TS. =
TAIWAN STRAIT= NE 4-5. ISOL SHOWERS. SEA UP TO 2 M. =
BASHI= E 4-5. ISOL SHOWERS. SEA UP TO 2 M. =
PRATAS= E 4-5. ISOL SHOWERS. SEA UP TO 2 M. =
BALINTANG= E 4-5. ISOL SHOWERS. SEA UP TO 2 M. =
SCARBOROUGH= E TO NE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
PARACEL= E TO SE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
TONKIN= SE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
DANANG= SE 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.


  • 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 19:30 HKT 09/May/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 7:30 p.m. on 09 May 2017

    Weather Situation:
    An easterly airstream is affecting the coastal waters of Guangdong.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East force 3 to 4.
    Visibility relatively low in some areas. A few showers later.
    Slight to moderate seas.

    Nan'ao, Shanwei and South of Hong Kong:
    East force 3 to 4.
    Slight to moderate seas.

    Shangchuan Dao:
    East to southeast force 3 to 4.
    Isolated showers and thunderstorms.
    Slight to moderate seas.

    Outlook for the next 48 hours
    East to southeasterly winds of force 4 to 5.

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

    Waglan Island Wind southwest force 2
      Visibility 13 Kilometres

    Shantou Wind west force 2
      Visibility 30 Kilometres

    Dongsha Wind north force 3
      Visibility 10 Kilometres

    Huangmaozhou Wind south-southwest force 1

    Macau Wind north force 1
      Visibility 3900 Metres in mist

    Xisha Wind east-southeast force 2
      Visibility 30 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
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    Weather Forecast for Local Aviation

    Bulletin issued at 19:30 HKT 09/MAY/2017
    (Next update at 01:30 HKT 10/MAY/2017)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THE RIDGE OF HIGH PRESSURE OVER THE WESTERN
     NORTH PACIFIC IS EXTENDING WESTWARDS GRADUALLY.
     THE CLOUD BAND COVERING SOUTHEASTERN CHINA WILL
     THIN OUT.
     
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  VRB/5
       OFFSHORE:  100/5-10                             27-25
   B.   2000 FT:  360/5-10                             22
   C.   5000 FT:  350/10                               18
   D.  10000 FT:  260/10                               10
   E.  18000 FT:  270/15                               MS6
   F.  24000 FT:  260/25                               MS18
   G.  30000 FT:  250/40                               MS31
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      CLOUDY PERIODS WITH A FEW SHOWERS.  LOCALIZED
      MIST/HAZE.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2500 FT  SCT 4000 FT.
   K. VISIBILITY    : 7 KM.  TEMPO 3500 M IN SHOWERS/MIST.
   L. 0 DEG. C LEVEL: 15500 FT      10 DEG. C LEVEL(S) : 10000 FT
   M. TURBULENCE    : NIL
   N. SEA STATE     : 0.5-1.0 M     SEA TEMPERATURE    : 26 DEG
IV.  FURTHER OUTLOOK: 
     LIGHT WINDS.  MAINLY FINE APART FROM A FEW
     SHOWERS AT FIRST. LOCALIZED MIST/HAZE.=

    ===================================================================
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 17:25 HKT on 09 May 17

    VHHK SIGMET 3 VALID 090740/091140 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1954 E11130 - N2100 E11130 - N2100 E11300 - N1954 E11236 - N1954 E11130 TOP FL450 MOV ENE 10KT NC= VHHK SIGMET 4 VALID 090925/091325 VHHH- VHHK HONG KONG FIR EMBD TS FCST N OF N1954 AND W OF E11336 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

    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/May/2017 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     28.6 C
Minimum Air Temperature                     23.1 C
Grass Minimum Temperature                   22.1 C
Relative Humidity                        76 - 89 Percent
Rainfall                                     9.2 mm 
Total rainfall since 1st January           188.0 mm
Against an average of                      417.2 mm

Other Stations                Min                  Max
King's Park                  22.3 C               28.6 C
Wong Chuk Hang               21.9 C               27.7 C
Ta Kwu Ling                  21.7 C               29.3 C
Lau Fau Shan                 21.1 C               29.5 C
Tai Po                       21.7 C               27.1 C
Sha Tin                      22.6 C               27.9 C
Tuen Mun                     21.8 C               29.9 C
Tseung Kwan O                22.1 C               26.5 C
Sai Kung                     22.2 C               27.0 C
Cheung Chau                  22.0 C               28.1 C
Chek Lap Kok                 22.2 C               30.1 C
Tsing Yi                     22.2 C               29.8 C
Shek Kong                    22.0 C               30.2 C
Tsuen Wan Ho Koon            21.0 C               26.6 C
Tsuen Wan Shing Mun Valley   21.9 C               28.2 C
Hong Kong Park               21.8 C               28.6 C
Shau Kei Wan                 21.6 C               26.5 C
Kowloon City                 21.7 C               28.1 C
Happy Valley                 22.3 C               29.9 C
Wong Tai Sin                 21.8 C               28.2 C
Stanley                      21.9 C               26.8 C
Kwun Tong                    22.2 C               27.4 C
Sham Shui Po                 22.3 C               28.9 C
Kai Tak Runway Park          21.9 C               27.1 C
Yuen Long Park               21.9 C               30.2 C
Tai Mei Tuk               21.7 C               28.4 C

Duration of sunshine (King's Park):              5.3 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 (08 May 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                             0.08
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 08 May
     2003copy right image | Important notices | Privacy policy Last revision date: <09 May 2017> 

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