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Bulletin updated at 23:15 HKT 27/May/2018

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

An anticyclone aloft continued to bring mainly fine weather to the coast of southeastern China today. Locally, there were sunny periods, isolated showers and thunderstorms. It was very hot in the afternoon. Temperatures over most parts of the territory rose to 33 degrees or above. Under the dominance of an anticyclone aloft, it will remain very hot over Guangdong in the next few days. Meanwhile, a southwesterly airstream will bring a few showers to the coastal areas.

Weather forecast for Hong Kong (Monday, 28 May 2018)

Mainly cloudy with isolated showers. The minimum temperature will be about 28 degrees. Very hot with sunny periods during the day. The maximum temperature will be around 33 degrees. Moderate southwesterly winds.

Outlook : Very hot weather will persist and there will be isolated showers in the following couple of days.


(The above forecast period is valid up to 23:59 HKT tomorrow, 28/05/2018; Regular update at : around 45 minutes past each hour, 16:15 HKT and 23:15 HKT)

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SOUTH CHINA COASTAL WATERS
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South China Coastal Waters

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Bulletin issued at 23:30 HKT 27/May/2018

Weather information for south China coastal waters issued by the Hong Kong Observatory at 11:30 p.m. on 27 May 2018

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

Area forecasts for the next 24 hours

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

Nan'ao and Shanwei:
Southwest force 4 to 5.
Moderate seas.

South of Hong Kong and Shangchuan Dao:
Southwest force 4 to 5.
Isolated showers and thunderstorms.
Moderate seas.

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

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

Waglan Island Wind west force 2
  Visibility 33 Kilometres

Shantou Wind south-southwest force 2
  Visibility 30 Kilometres

Huangmaozhou Wind west-northwest force 3

Macau Wind north force 1
  Visibility 14 Kilometres

Xisha Wind southeast force 1
  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 17:30 HKT 27/MAY/2018
    (Next update at 01:30 HKT 28/MAY/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     A SOUTHWESTERLY AIRSTREAM IS AFFECTING THE SOUTH
     CHINA COASTAL AREAS.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  240/10
       OFFSHORE:  240/15                               31-28
   B.   2000 FT:  270/15                               24
   C.   5000 FT:  290/10                               21
   D.  10000 FT:  260/10                               12
   E.  18000 FT:  200/15                               MS2
   F.  24000 FT:  180/15                               MS14
   G.  30000 FT:  130/15                               MS28
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY AND ISOLATED SHOWERS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT  SCT 4000 FT.
   K. VISIBILITY    : 10 KM.  TEMPO 4000 M IN SHOWERS.
   L. 0 DEG. C LEVEL: 17000 FT      10 DEG. C LEVEL(S) : 10800 FT
   M. TURBULENCE    : MOD OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 1.5 M         SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE SOUTHWESTERLY WINDS.  SUNNY PERIODS AND
     ISOLATED 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.

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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 27/May/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     34.7 C
Minimum Air Temperature                     28.8 C
Grass Minimum Temperature                   27.2 C
Relative Humidity                        55 - 82 Percent
Rainfall                                     0.9 mm 
Total rainfall since 1st January           171.6 mm
Against an average of                      570.3 mm

Other Stations                Min                  Max
King's Park                  27.8 C               33.8 C
Wong Chuk Hang               27.1 C               32.5 C
Ta Kwu Ling                  25.2 C               35.8 C
Lau Fau Shan                 25.8 C               35.1 C
Tai Po                       28.0 C               34.2 C
Sha Tin                      28.7 C               34.1 C
Tuen Mun                     26.8 C               34.5 C
Tseung Kwan O                25.9 C               34.8 C
Sai Kung                     27.1 C               35.2 C
Cheung Chau                  27.7 C               35.4 C
Chek Lap Kok                 29.3 C               35.4 C
Tsing Yi                     27.8 C               33.8 C
Shek Kong                    26.3 C               34.8 C
Tsuen Wan Ho Koon            26.5 C               32.4 C
Tsuen Wan Shing Mun Valley   27.7 C               32.3 C
Hong Kong Park               28.1 C               33.4 C
Shau Kei Wan                 26.8 C               33.9 C
Kowloon City                 27.5 C               34.5 C
Happy Valley                 28.0 C               34.9 C
Wong Tai Sin                 28.1 C               34.2 C
Stanley                      26.5 C               31.6 C
Kwun Tong                    27.6 C               34.4 C
Sham Shui Po                 28.2 C               32.8 C
Kai Tak Runway Park          27.7 C               34.1 C
Yuen Long Park               26.0 C               35.2 C
Tai Mei Tuk               27.8 C               34.4 C

Duration of sunshine (King's Park):              10.9 H
The mean UV index recorded at King's Park yesterday was 6,
the UV intensity was High.
The maximum UV index for yesterday was 11.
Sea surface temperature (Waglan Island):        26.9 C 

Yesterday's (26 May 2018) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.08 to
0.15 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                         0.15
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 26 May
     2003copy right image | Important notices | Privacy policy Last revision date: <27 May 2018> 

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