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Bulletin issued at 09:02 HKT 20/Sep/2018

At 9 a.m. at the Hong Kong Observatory the air temperature was 28 degrees Celsius and the relative humidity 82 per cent.
During the past hour the mean UV Index recorded at King's Park was 1. The intensity of UV radiation was low.

The air temperatures at other places were:

King's Park 28 degrees;
Wong Chuk Hang 29 degrees;
Ta Kwu Ling 29 degrees;
Lau Fau Shan 27 degrees;
Sha Tin 30 degrees;
Tuen Mun 29 degrees;
Tseung Kwan O 30 degrees;
Sai Kung 30 degrees;
Cheung Chau 29 degrees;
Chek Lap Kok 29 degrees;
Tsing Yi 28 degrees;
Shek Kong 30 degrees;
Tsuen Wan Ho Koon 27 degrees;
Tsuen Wan Shing Mun Valley 29 degrees;
Hong Kong Park 28 degrees;
Shau Kei Wan 29 degrees;
Kowloon City 29 degrees;
Happy Valley 30 degrees;
Wong Tai Sin 30 degrees;
Stanley 29 degrees;
Kwun Tong 29 degrees;
Sham Shui Po 30 degrees;
Kai Tak Runway Park 30 degrees;
Yuen Long Park 30 degrees;
Tai Mei Tuk 29 degrees.

Between midnight and 9 a.m. the minimum temperature was 27.0 degrees Celsius at the Hong Kong Observatory.


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


Climatological Information for 20 Sep

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Bulletin updated at 08:45 HKT 20/Sep/2018

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

The subtropical ridge is affecting southern China.

Weather forecast for today

Sunny periods. The maximum temperature will be around 31 degrees. Isolated showers later. Light winds.

Outlook : Mainly fine and hot in the next couple of days. Cloudier early next week.


(The above forecast period is valid up to 23:59 HKT today, 20/09/2018; 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 20/Sep/2018

N0 WARNING.

GENERAL SITUATION AT 192100 UTC:
AN EASTERLY AIRSTREAM IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 200100 UTC:

HONG KONG= E 3-4. ISOL SHOWERS. TEMP 31-27 C. =
KWANGTUNG= E 4, OCNL 5. ISOL SHOWERS. SEA UP TO 2 M. =
TAIWAN STRAIT= SW 4. ISOL SHOWERS. =
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. SEA UP TO 2 M. =
PARACEL= E TO NE 4-5. ISOL SHOWERS. SEA UP TO 2 M. =
TONKIN= E 4-5. ISOL SHOWERS. SEA UP TO 2 M. =
DANANG= E TO NE 4-5. ISOL SHOWERS. 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

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    Bulletin issued at 09:30 HKT 20/Sep/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 20 September 2018

    Weather Situation:
    An easterly airstream is affecting the south China coastal waters.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East force 3 to 4.
    Isolated showers.
    Slight to moderate seas.

    Nan'ao, Shanwei, South of Hong Kong and Shangchuan Dao:
    East force 4, occasionally force 5.
    Moderate seas.

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

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

    Shantou Wind calm
      Visibility 30 Kilometres

    Dongsha Wind north-northeast force 2
      Visibility 10 Kilometres

    Huangmaozhou Wind northwest force 1

    Macau Wind west force 1
      Visibility 11 Kilometres

    Xisha Wind northeast force 2
      Visibility 25 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 09:30 HKT 20/SEP/2018
    (Next update at 12:30 HKT 20/SEP/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THE SUBTROPICAL RIDGE IS AFFECTING SOUTHERN
     CHINA.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  VRB/05                               29-31
   B.   2000 FT:  180/10                               23
   C.   5000 FT:  090/10                               19
   D.  10000 FT:  080/15                               12
   E.  18000 FT:  070/10                               MS2
   F.  24000 FT:  060/20                               MS13
   G.  30000 FT:  060/35                               MS26
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      SUNNY PERIODS.  ISOLATED SHOWERS LATER.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT SCT 3500 FT
   K. VISIBILITY    : 8 KM. TEMPO 4000 M IN SHOWERS.
   L. 0 DEG. C LEVEL: 17000 FT      10 DEG. C LEVEL(S) : 12000 FT
   M. TURBULENCE    : NIL
   N. SEA STATE     : 0.5-1.0 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     MAINLY CLOUDY. LIGHT WINDS.=

    ===================================================================
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 06:55 HKT on 18 Sep 18

    VHHK SIGMET 6 VALID 171900/172300 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1800 E11506 - N1642 E11400 - N1930 E11130 - N1954 E11130 - N2018 E11424 - N1800 E11506 TOP FL380 STNR WKN= VHHK SIGMET 7 VALID 172300/180300 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1700 E11418 - N1642 E11400 - N1924 E11136 - N1936 E11130 - N2006 E11130 - N2100 E11318 - N1700 E11418 TOP FL350 STNR 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 20/Sep/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     31.4 C
Minimum Air Temperature                     26.2 C
Grass Minimum Temperature                   25.0 C
Relative Humidity                        64 - 88 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          1856.9 mm
Against an average of                     2140.7 mm

Other Stations                Min                  Max
King's Park                  25.6 C               31.7 C
Wong Chuk Hang               24.3 C               30.8 C
Ta Kwu Ling                  23.2 C               33.6 C
Lau Fau Shan                 24.3 C               31.4 C
Sha Tin                      24.1 C               32.8 C
Tuen Mun                     24.8 C               32.3 C
Tseung Kwan O                23.7 C               33.2 C
Sai Kung                     24.5 C               32.7 C
Cheung Chau                  24.5 C               32.9 C
Chek Lap Kok                 25.7 C               32.3 C
Tsing Yi                     24.8 C               31.8 C
Shek Kong                    23.1 C               34.5 C
Tsuen Wan Ho Koon            23.6 C               30.4 C
Tsuen Wan Shing Mun Valley   23.8 C               33.2 C
Hong Kong Park               25.1 C               31.0 C
Shau Kei Wan                 25.5 C               31.8 C
Kowloon City                 25.5 C               33.1 C
Happy Valley                 24.7 C               32.3 C
Wong Tai Sin                 24.7 C               32.4 C
Stanley                      25.2 C               31.0 C
Kwun Tong                    25.7 C               32.8 C
Sham Shui Po                 25.7 C               32.7 C
Kai Tak Runway Park          25.6 C               31.6 C
Yuen Long Park               23.6 C               33.4 C
Tai Mei Tuk               24.5 C               34.7 C

Duration of sunshine (King's Park):              10.1 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 9.
 

Yesterday's (19 Sep 2018) 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                         0.11
Tai Mei Tuk                         0.11
Sha Tau Kok                         0.10
Kwun Tong                           0.12
Sai Wan Ho                          0.08
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 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 19 Sep
     2003copy right image | Important notices | Privacy policy Last revision date: <20 Sep 2018> 

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