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Bulletin issued at 01:02 HKT 24/Sep/2018

At 1 a.m. at the Hong Kong Observatory the air temperature was 28 degrees Celsius and the relative humidity 84 per cent.

The air temperatures at other places were:

King's Park 27 degrees;
Wong Chuk Hang 27 degrees;
Ta Kwu Ling 26 degrees;
Lau Fau Shan 26 degrees;
Tai Po 27 degrees;
Sha Tin 27 degrees;
Tuen Mun 27 degrees;
Tseung Kwan O 26 degrees;
Sai Kung 27 degrees;
Cheung Chau 27 degrees;
Chek Lap Kok 29 degrees;
Tsing Yi 27 degrees;
Shek Kong 26 degrees;
Tsuen Wan Ho Koon 25 degrees;
Tsuen Wan Shing Mun Valley 26 degrees;
Hong Kong Park 27 degrees;
Shau Kei Wan 27 degrees;
Kowloon City 27 degrees;
Happy Valley 28 degrees;
Wong Tai Sin 27 degrees;
Stanley 27 degrees;
Kwun Tong 27 degrees;
Sham Shui Po 27 degrees;
Kai Tak Runway Park 27 degrees;
Yuen Long Park 27 degrees;
Tai Mei Tuk 27 degrees.


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


Climatological Information for 24 Sep

Regional Weather in Hong Kong

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Bulletin updated at 00:45 HKT 24/Sep/2018

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

Winds were weak over Guangdong yesterday, and thundery showers triggered by high temperatures affected the region. Locally, there were sunny periods and also a few showers. Thunderstorms and more than 10 millimetres of rainfall were recorded over parts of the New Territories in the afternoon. Under the influence of an easterly airstream, there will be a few showers over the south China coast today and tomorrow.

Besides, Tropical Cyclone Trami intensified progressively from a severe tropical storm into a severe typhoon yesterday. At 11 p.m. last night, Trami was centred about 1420 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 Hong Kong

Mainly cloudy with sunny intervals. A few showers and isolated thunderstorms. Temperatures will range 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 today, 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 21:05 HKT 23/Sep/2018

GALE WARNING AREAS: KWANGTUNG AND TAIWAN STRAIT.

GENERAL SITUATION AT 230900 UTC:
AN EASTERLY AIRSTREAM IS GENERALLY AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 231305 UTC:

HONG KONG= E 3-4. ISOL SHOWERS AND TS. TEMP 26-31 C. =
KWANGTUNG= E TO NE 4, OCNL 5, 7-8 IN E LATER. ISOL SHOWERS AND TS. SEA UP TO 2 M, 4-6 M IN E LATER. SWELL E UP TO 2 M. =
TAIWAN STRAIT= NE 4-5, 7-8 LATER. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 2 M, 4-6 M LATER. SWELL NE UP TO 2 M. =
BASHI= N TO NE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL E 2 M, 3 M LATER. =
PRATAS= NE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
BALINTANG= N TO NE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL E 2 M, 3 M LATER. =
SCARBOROUGH= N TO NE 4. ISOL SHOWERS AND TS. =
PARACEL= E TO NE 4. ISOL SHOWERS. =
TONKIN= E 4. ISOL SHOWERS. =
DANANG= E 4. ISOL SHOWERS. =
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
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    • 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 23:30 HKT 23/Sep/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 11:30 p.m. on 23 September 2018

    Warnings:
    Gale force winds in Nan'ao. Strong winds in Shanwei.

    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 7 to 8 later.
    Isolated showers and thunderstorms.
    Moderate seas, becoming rough to very rough later.

    Shanwei:
    East force 4 to 5, becoming force 6 later.
    Isolated showers and thunderstorms.
    Moderate seas, becoming rough later.

    South of Hong Kong and Shangchuan Dao:
    East force 4.
    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 variable force 1

    Shantou Wind calm
      Visibility 12 Kilometres in rain

    Huangmaozhou Wind east force 3

    Macau Wind south force 2
      Visibility 40 Kilometres

    Xisha Wind northeast force 2
      Visibility 30 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 01:30 HKT 24/SEP/2018
    (Next update at 9:00-9:30 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 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  090/5-10
                  TEMPO VRB/15G25 IN TS                27-31
   B.   2000 FT:  050/10                               21
   C.   5000 FT:  030/5-10                             18
   D.  10000 FT:  350/5-10                             10
   E.  18000 FT:  350/10                               MS5
   F.  24000 FT:  020/15                               MS15
   G.  30000 FT:  030/25                               MS25
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      2100-3300 FT
   I. WEATHER       : 
      MAINLY CLOUDY WITH A FEW SHOWERS. SUNNY
      INTERVALS DURING THE DAY. A CHANCE OF ISOLATED
      THUNDERSTORMS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2500 FT SCT 5000 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) : 10000 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS
   N. SEA STATE     : 0.5-1.0 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 24/Sep/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     32.4 C
Minimum Air Temperature                     27.6 C
Grass Minimum Temperature                   26.5 C
Relative Humidity                        67 - 85 Percent
Rainfall                                      Trace 
Total rainfall since 1st January          1856.9 mm
Against an average of                     2177.6 mm

Other Stations                Min                  Max
King's Park                  26.7 C               32.4 C
Wong Chuk Hang               25.8 C               31.3 C
Ta Kwu Ling                  25.7 C               33.3 C
Lau Fau Shan                 25.4 C               30.7 C
Tai Po                       25.9 C               32.0 C
Sha Tin                      26.3 C               32.5 C
Tuen Mun                     26.0 C               33.0 C
Tseung Kwan O                25.8 C               32.0 C
Sai Kung                     27.0 C               32.7 C
Cheung Chau                  25.4 C               34.5 C
Chek Lap Kok                 27.5 C               32.9 C
Tsing Yi                     26.6 C               31.4 C
Shek Kong                    24.9 C               33.2 C
Tsuen Wan Ho Koon            24.5 C               30.8 C
Tsuen Wan Shing Mun Valley   25.1 C               31.8 C
Hong Kong Park               25.5 C               32.5 C
Shau Kei Wan                 26.5 C               30.9 C
Kowloon City                 26.6 C               33.1 C
Happy Valley                 26.8 C               32.7 C
Wong Tai Sin                 26.8 C               32.9 C
Stanley                      26.8 C               32.1 C
Kwun Tong                    25.7 C               31.7 C
Sham Shui Po                 26.1 C               32.4 C
Kai Tak Runway Park          27.3 C               30.7 C
Yuen Long Park               25.2 C               33.7 C
Tai Mei Tuk               26.0 C               34.6 C

Duration of sunshine (King's Park):              6.6 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 (23 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                               0.09
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 23 Sep
     2003copy right image | Important notices | Privacy policy Last revision date: <24 Sep 2018> 

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