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Bulletin issued at 15:02 HKT 17/Sep/2017

At 3 p.m. at the Hong Kong Observatory the air temperature was 32 degrees Celsius and the relative humidity 63 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 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 32 degrees;
Wong Chuk Hang 31 degrees;
Ta Kwu Ling 35 degrees;
Lau Fau Shan 34 degrees;
Tai Po 33 degrees;
Sha Tin 35 degrees;
Tuen Mun 34 degrees;
Tseung Kwan O 33 degrees;
Sai Kung 31 degrees;
Cheung Chau 33 degrees;
Chek Lap Kok 35 degrees;
Tsing Yi 33 degrees;
Shek Kong 35 degrees;
Tsuen Wan Ho Koon 33 degrees;
Tsuen Wan Shing Mun Valley 33 degrees;
Hong Kong Park 32 degrees;
Shau Kei Wan 32 degrees;
Kowloon City 33 degrees;
Happy Valley 33 degrees;
Wong Tai Sin 33 degrees;
Stanley 32 degrees;
Kwun Tong 32 degrees;
Sham Shui Po 34 degrees;
Kai Tak Runway Park 32 degrees;
Yuen Long Park 35 degrees;
Tai Mei Tuk 33 degrees.


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


Climatological Information for 17 Sep

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Bulletin updated at 14:45 HKT 17/Sep/2017

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

The anticyclone aloft is bringing generally fine and very hot weather to southeastern China. Locally, temperatures over many places rose to about 33 degrees around noon.

At noon, Severe Tropical Storm Talim was centred about 60 kilometres northeast of Kagoshima. It is forecast to move northeast at about 35 kilometres per hour across Japan.

Weather forecast for this afternoon and tonight

Mainly fine and very hot but hazy. Light winds.

Outlook : Mainly fine in the next couple of days. Cloudier with a few showers in the middle and latter parts of this week.


(The above forecast period is valid up to 23:59 HKT today, 17/09/2017; 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 17/Sep/2017

N0 WARNING.

GENERAL SITUATION AT 162100 UTC:
A NORTHERLY AIRSTREAM IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 170100 UTC:

HONG KONG= NW 4. DOWN TO 4000 M IN SOME HAZE. SWELL S UP TO 2 M. TEMP 34-27 C. =
KWANGTUNG= NW 4-5. FINE. SEA UP TO 2 M. SWELL S 2 M. =
TAIWAN STRAIT= N TO NE 4-5, UP TO 6 LATER. FINE. SEA 2 M, UP TO 3 M LATER. SWELL NE 3-5 M. =
BASHI= N TO NE 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. SWELL NE 3-5 M. =
PRATAS= NW 4-5. FINE. SEA UP TO 2 M. SWELL S 2 M. =
BALINTANG= NW 4-5, OCNL 6. ISOL SHOWERS AND TS. SEA UP TO 3 M. SWELL NE 2-3 M. =
SCARBOROUGH= NW 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL S 2 M. =
PARACEL= W TO NW 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL S TO SE 2 M. =
TONKIN= NW 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL S TO SE 2 M. =
DANANG= NW 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL S TO SE 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 17/Sep/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 12:30 p.m. on 17 September 2017

    Weather Situation:
    A northerly airstream is affecting the south China coastal waters.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    Northwest force 4, becoming east force 4 to 5 later.
    Some haze. A few showers tomorrow.
    Moderate seas.

    Nan'ao and Shanwei:
    Northwest force 4 to 5, becoming east force 5 later.
    Moderate seas.

    South of Hong Kong:
    Northwest force 4 to 5, becoming east force 4 to 5 later.
    Moderate seas.

    Shangchuan Dao:
    Northwest force 4 to 5.
    Moderate seas.

    Outlook for the next 48 hours
    Easterly winds of force 5.

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

    Waglan Island Wind east-southeast force 1
      Visibility 23 Kilometres

    Shantou Wind south-southeast force 2
      Visibility 25 Kilometres

    Dongsha Wind west-northwest force 4
      Visibility 10 Kilometres

    Macau Wind north-northeast force 2
      Visibility 11 Kilometres

    Xisha Wind south-southwest force 2
      Visibility 19 Kilometres

  • Explanation of Seas or Sea Waves
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  • Visibility Readings in Hong Kong Waters
  • Map showing forecast areas
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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 09:30 HKT 17/SEP/2017
    (Next update at 17:30 HKT 17/SEP/2017)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THE ANTICYCLONE ALOFT IS BRINGING GENERALLY FINE
     WEATHER TO SOUTHEASTERN CHINA.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  VRB/5-10                             30-35
   B.   2000 FT:  330/10-15                            24
   C.   5000 FT:  330/10-15                            20
   D.  10000 FT:  330/15                               13
   E.  18000 FT:  350/15                               MS4
   F.  24000 FT:  020/20                               MS14
   G.  30000 FT:  040/35                               MS30
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY FINE. LOCALIZED HAZE.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 3500 FT.
   K. VISIBILITY    : 7 KM.  TEMPO 4000 M IN HAZE.
   L. 0 DEG. C LEVEL: 17000 FT      10 DEG. C LEVEL(S) : 11400 FT
   M. TURBULENCE    : NIL.
   N. SEA STATE     : 0.5-1.0 M     SEA TEMPERATURE    : 28 DEG
IV.  FURTHER OUTLOOK: 
     LIGHT WINDS. MAINLY FINE.  LOCALIZED 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 07:30 HKT on 15 Sep 17

    VHHK SIGMET 5 VALID 141930/142330 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1648 E11406 - N1642 E11400 - N1930 E11130 - N2124 E11130 - N2148 E11218 - N1900 E11342 - N1648 E11406 TOP FL420 MOV W 10KT NC= VHHK SIGMET 6 VALID 142330/150330 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1800 E11248 - N1930 E11130 - N2124 E11130 - N2154 E11236 - N1918 E11306 - N1800 E11248 TOP FL420 MOV W 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 17/Sep/2017 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     32.6 C
Minimum Air Temperature                     27.7 C
Grass Minimum Temperature                   26.9 C
Relative Humidity                        53 - 91 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          2348.7 mm
Against an average of                     2118.7 mm

Other Stations                Min                  Max
King's Park                  27.5 C               33.5 C
Wong Chuk Hang               26.4 C               33.0 C
Ta Kwu Ling                  25.2 C               34.8 C
Lau Fau Shan                 26.8 C               33.8 C
Tai Po                       26.6 C               34.2 C
Sha Tin                      26.0 C               35.3 C
Tuen Mun                     26.8 C               34.0 C
Tseung Kwan O                25.3 C               34.0 C
Sai Kung                     26.9 C               33.5 C
Cheung Chau                  26.2 C               34.7 C
Chek Lap Kok                 28.0 C               35.0 C
Tsing Yi                     26.8 C               33.4 C
Shek Kong                    25.9 C               35.3 C
Tsuen Wan Ho Koon            25.5 C               32.6 C
Tsuen Wan Shing Mun Valley   25.7 C               34.9 C
Hong Kong Park               27.0 C               33.6 C
Shau Kei Wan                 27.5 C               33.5 C
Kowloon City                 27.2 C               34.9 C
Happy Valley                 27.1 C               34.0 C
Wong Tai Sin                 25.6 C               34.1 C
Stanley                      27.0 C               32.5 C
Kwun Tong                    27.5 C               34.0 C
Sham Shui Po                 27.3 C               33.9 C
Kai Tak Runway Park          28.0 C               33.6 C
Yuen Long Park               26.4 C               35.6 C
Tai Mei Tuk               27.1 C               34.6 C

Duration of sunshine (King's Park):              10.6 H
The mean UV index recorded at King's Park yesterday was 3,
the UV intensity was Moderate.
The maximum UV index for yesterday was 8.
Sea surface temperature (Waglan Island):        29.3 C 

Yesterday's (16 Sep 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                               0.08
Yuen Ng Fan                         0.12
Tai Mei Tuk                         0.12
Sha Tau Kok                         0.10
Kwun Tong                           0.11
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 16 Sep
     2003copy right image | Important notices | Privacy policy Last revision date: <17 Sep 2017> 

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