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Bulletin issued at 18:02 HKT 23/Sep/2018

At 6 p.m. at the Hong Kong Observatory the air temperature was 29 degrees Celsius and the relative humidity 78 per cent.
During the past hour the mean UV Index recorded at King's Park was 0.1. The intensity of UV radiation was low.

Please be reminded that:

The Thunderstorm Warning has been issued. It will remain effective until 6:45 p.m. today. Isolated thunderstorms are expected to occur over New Territories East.

The air temperatures at other places were:

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

Between 4:45 and 5:45 p.m., lightning was detected within New Territories East and New Territories West. The rainfall recorded in various regions were:

Yuen Long 0 to 14 mm;
Tuen Mun 0 to 6 mm.


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


Climatological Information for 23 Sep

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


Local Weather Forecast
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Bulletin updated at 17:45 HKT 23/Sep/2018

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

Winds are weak over Guangdong. Thundery showers triggered by high temperatures are affecting the region.

At 4 p.m., Typhoon Trami was centred about 1540 kilometres east-southeast of Gaoxiong. It is forecast to move west-northwest at about 18 kilometres per hour across the western North Pacific.

Weather forecast for tonight and tomorrow

Mainly cloudy with a few showers and isolated thunderstorms. Sunny intervals tomorrow with temperatures ranging between 26 and 31 degrees. Light to moderate easterly winds.

Outlook : Sunny periods and a few showers in the following couple of days. Mainly fine and dry in the latter part of this week.


(The above forecast period is valid up to 23:59 HKT tomorrow, 24/09/2018; 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 23/Sep/2018

N0 WARNING.

GENERAL SITUATION AT 222100 UTC:
AN EASTERLY AIRSTREAM IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 230100 UTC:

HONG KONG= E 4. ISOL SHOWERS AND TS. TEMP 31-26 C. =
KWANGTUNG= E TO NE 4, OCNL 5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL E UP TO 2 M. =
TAIWAN STRAIT= NE 4-5, 6 LATER. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS LATER. SEA 2 M, 3 M LATER. SWELL NE UP TO 2 M. =
BASHI= NE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL E 2 M, UP TO 3 M LATER. =
PRATAS= E TO NE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL E UP TO 2 M. =
BALINTANG= NE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL E 2 M, UP TO 3 M LATER. =
SCARBOROUGH= E TO NE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL E TO NE UP TO 2 M. =
PARACEL= E 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL E UP TO 2 M. =
TONKIN= E 4, OCNL 5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
DANANG= E 4-5. DOWN TO 4000 M IN ISOL SQUALLY 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 16:30 HKT 23/Sep/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 4:30 p.m. on 23 September 2018

    Warnings:
    Strong winds in Nan'ao.

    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 and thunderstorms.
    Slight to moderate seas.

    Nan'ao:
    East to northeast force 4 to 5, becoming force 6 to 7 later.
    Isolated showers and thunderstorms.
    Moderate seas, becoming rough later.

    Shanwei, South of Hong Kong and Shangchuan Dao:
    East force 4, occasionally force 5.
    Isolated showers and thunderstorms.
    Moderate seas.

    Outlook for the next 48 hours
    East to northeasterly winds of force 4 to 5, north to northeasterly winds of force 7 to 8 in east. Isolated showers and thunderstorms.

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

    Waglan Island Wind south force 2

    Shantou Wind east-southeast force 2
      Visibility 30 Kilometres

    Dongsha Wind east force 2
      Visibility 10 Kilometres

    Huangmaozhou Wind south-southwest force 2

    Macau Wind south-southeast force 2
      Visibility 50 Kilometres or above

    Xisha Wind northwest force 2
      Visibility 30 Kilometres

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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 17:30 HKT 23/SEP/2018
    (Next update at 01:30 HKT 24/SEP/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AN EASTERLY 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:  120/5-10
                  TEMPO VRB/15G25 IN TS                30-26
   B.   2000 FT:  080/10                               23
   C.   5000 FT:  080/10                               18
   D.  10000 FT:  040/10                               10
   E.  18000 FT:  300/10                               MS3
   F.  24000 FT:  310/10                               MS13
   G.  30000 FT:  350/20                               MS27
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY WITH A FEW SHOWERS AND ISOLATED
      THUNDERSTORMS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT SCT 3000 FT. 
      TEMPO FEW CB 1000 FT  SCT 2000 FT BKN 4000 FT.
   K. VISIBILITY    : 10 KM. TEMPO 4000 M IN SHOWERS. 
                      TEMPO 2500 M IN TS.
   L. 0 DEG. C LEVEL: 16500 FT      10 DEG. C LEVEL(S) : 10400 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS
   N. SEA STATE     : 1.0 M         SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     LIGHT TO MODERATE EASTERLY WINDS. MAINLY CLOUDY
     WITH A FEW SHOWERS AND ISOLATED THUNDERSTORMS.=

    ===================================================================
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 23/Sep/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     33.2 C
Minimum Air Temperature                     27.0 C
Grass Minimum Temperature                   25.6 C
Relative Humidity                        61 - 86 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          1856.9 mm
Against an average of                     2172.2 mm

Other Stations                Min                  Max
King's Park                  25.9 C               32.6 C
Wong Chuk Hang               24.1 C               31.1 C
Ta Kwu Ling                  25.0 C               34.5 C
Lau Fau Shan                 25.3 C               30.7 C
Tai Po                       24.8 C               32.9 C
Sha Tin                      24.4 C               32.0 C
Tuen Mun                     25.7 C               33.0 C
Tseung Kwan O                24.2 C               33.2 C
Sai Kung                     25.5 C               33.1 C
Cheung Chau                  24.9 C               33.4 C
Chek Lap Kok                 26.4 C               32.4 C
Tsing Yi                     25.4 C               31.4 C
Shek Kong                    24.2 C               35.3 C
Tsuen Wan Ho Koon            23.3 C               31.4 C
Tsuen Wan Shing Mun Valley   23.5 C               32.1 C
Hong Kong Park               25.4 C               32.0 C
Shau Kei Wan                 25.6 C               31.4 C
Kowloon City                 25.7 C               33.4 C
Happy Valley                 25.0 C               33.3 C
Wong Tai Sin                 25.3 C               33.0 C
Stanley                      25.6 C               31.8 C
Kwun Tong                    26.0 C               32.8 C
Sham Shui Po                 26.1 C               32.3 C
Kai Tak Runway Park          26.3 C               30.9 C
Yuen Long Park               25.0 C               33.7 C
Tai Mei Tuk               25.6 C               33.9 C

Duration of sunshine (King's Park):              11.2 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 8.
 

Yesterday's (22 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                           0.09
Tap Mun                             0.08
Kat O                               0.10
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 22 Sep
     2003copy right image | Important notices | Privacy policy Last revision date: <23 Sep 2018> 

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