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Bulletin issued at 07:02 HKT 11/Jul/2017

At 7 a.m. at the Hong Kong Observatory the air temperature was 28 degrees Celsius and the relative humidity 86 per cent.

Hot weather might cause adverse health effects. The Observatory advises the public to stay on the alert.

The air temperatures at other places were:

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


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


Climatological Information for 11 Jul

Regional Weather in Hong Kong

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Hong Kong Climatology


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Bulletin updated at 06:45 HKT 11/Jul/2017

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

The subtropical ridge is covering the coast of southeastern China. Meanwhile, showers are affecting the northern part of the South China Sea.

Weather forecast for today

Sunny periods and isolated showers. Hot during the day. The maximum temperature will be around 32 degrees in the urban areas, and a couple of degrees higher in the New Territories. Moderate south to southeasterly winds.

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


(The above forecast period is valid up to 23:59 HKT today, 11/07/2017; 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 21:00 HKT 10/Jul/2017

N0 WARNING.

GENERAL SITUATION AT 100900 UTC:
A SOUTHERLY AIRSTREAM IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 101300 UTC:

HONG KONG= S TO SE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. TEMP 28-32 C. =
KWANGTUNG= S TO SE 4-5, UP TO 6 IN W. ISOL SHOWERS AND TS. SEA 2 M, UP TO 3 M IN W. =
TAIWAN STRAIT= S 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
BASHI= S TO SE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL SE UP TO 2 M. =
PRATAS= S TO SE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
BALINTANG= S TO SE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL SE UP TO 2 M. =
SCARBOROUGH= S TO SE 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
PARACEL= S TO SE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
TONKIN= S TO SE 4-5, OCNL 6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 3 M. =
DANANG= S TO SE 4-5, OCNL 6. ISOL SHOWERS AND TS. SEA UP TO 3 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 05:30 HKT 11/Jul/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 5:30 a.m. on 11 July 2017

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

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    South to southeast force 4 to 5.
    Isolated showers and thunderstorms.
    Moderate seas.

    Nan'ao, Shanwei, South of Hong Kong and Shangchuan Dao:
    South to southeast force 4 to 5.
    Isolated showers and thunderstorms.
    Moderate seas.

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

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

    Waglan Island Wind southwest force 2
      Visibility 45 Kilometres

    Shantou Wind south-southwest force 1
      Visibility 30 Kilometres

    Dongsha Wind north force 1
      Visibility 10 Kilometres

    Huangmaozhou Wind south-southeast force 4

    Macau Wind south-southwest force 1
      Visibility 29 Kilometres

    Xisha Wind southeast force 2
      Visibility 30 Kilometres

  • Explanation of Seas or Sea Waves
  • Explanation of Swells
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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 01:30 HKT 11/JUL/2017
    (Next update at 9:00-9:30 HKT 11/JUL/2017)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL
II.  SYNOPSIS OF THE WEATHER SITUATION :
     A SOUTHERLY AIRSTREAM IS AFFECTING 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:  160/5-10
       OFFSHORE:  160/15                               28-32
   B.   2000 FT:  170/15                               22
   C.   5000 FT:  180/15                               19
   D.  10000 FT:  160/15                               11
   E.  18000 FT:  150/15                               MS4
   F.  24000 FT:  140/15                               MS13
   G.  30000 FT:  100/15                               MS28
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY WITH ISOLATED SHOWERS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT  SCT 3000 FT.
   K. VISIBILITY    : 10 KM.  TEMPO 4000 M IN SHOWERS.
   L. 0 DEG. C LEVEL: 17340 FT      10 DEG. C LEVEL(S) : 11000 FT
   M. TURBULENCE    : MOD OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 1.0-1.5 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE SOUTH TO SOUTHEASTERLY WINDS. SUNNY
     PERIODS WITH ISOLATED SHOWERS. THERE WILL ALSO
     BE ISOLATED THUNDERSTORMS OVER INLAND.=

    ===================================================================
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 16:00 HKT on 08 Jul 17

    VHHK SIGMET 2 VALID 080500/080800 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2218 E11318 - N2224 E11330 - N2300 E11536 - N2130 E11400 - N2112 E11300 - N2218 E11318 TOP FL400 MOV N 05KT WKN= VHHK SIGMET 3 VALID 080800/081200 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2230 E11524 - N2200 E11500 - N2124 E11348 - N2224 E11400 - N2230 E11500 - N2230 E11524 TOP FL380 MOV NNE 05KT WKN=

    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 11/Jul/2017 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     32.1 C
Minimum Air Temperature                     27.5 C
Grass Minimum Temperature                   26.2 C
Relative Humidity                        65 - 88 Percent
Rainfall                                     0.6 mm 
Total rainfall since 1st January          1340.9 mm
Against an average of                     1199.3 mm

Other Stations                Min                  Max
King's Park                  27.1 C               32.2 C
Wong Chuk Hang               27.0 C               31.0 C
Ta Kwu Ling                  24.4 C               33.5 C
Lau Fau Shan                 25.8 C               31.9 C
Tai Po                       25.7 C               32.4 C
Sha Tin                      25.9 C               32.7 C
Tuen Mun                     26.0 C               32.4 C
Tseung Kwan O                25.8 C               32.6 C
Sai Kung                     26.3 C               32.3 C
Chek Lap Kok                 28.0 C               32.3 C
Tsing Yi                     26.6 C               32.1 C
Shek Kong                    26.3 C               33.2 C
Tsuen Wan Ho Koon            25.8 C               29.7 C
Tsuen Wan Shing Mun Valley   26.4 C               31.7 C
Hong Kong Park               27.1 C               30.9 C
Shau Kei Wan                 27.2 C               31.4 C
Kowloon City                 26.5 C               32.0 C
Happy Valley                 27.9 C               32.2 C
Wong Tai Sin                 26.9 C               32.7 C
Stanley                      27.1 C               32.4 C
Kwun Tong                    27.5 C               32.7 C
Sham Shui Po                 26.6 C               32.3 C
Kai Tak Runway Park          27.5 C               32.4 C
Yuen Long Park               25.3 C               32.4 C
Tai Mei Tuk               26.1 C               32.8 C

Duration of sunshine (King's Park):              5.9 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 (10 Jul 2017) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.07 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                           0.07
Tap Mun                             0.08
Kat O                               0.08
Yuen Ng Fan                         0.11
Tai Mei Tuk                         0.11
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 10 Jul
     2003copy right image | Important notices | Privacy policy Last revision date: <11 Jul 2017> 

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