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Bulletin issued at 04:02 HKT 04/Sep/2018

At 4 a.m. at the Hong Kong Observatory the air temperature was 27 degrees Celsius and the relative humidity 90 per cent.

The air temperatures at other places were:

King's Park 26 degrees;
Wong Chuk Hang 27 degrees;
Ta Kwu Ling 24 degrees;
Lau Fau Shan 26 degrees;
Sha Tin 26 degrees;
Tuen Mun 27 degrees;
Tseung Kwan O 25 degrees;
Sai Kung 26 degrees;
Cheung Chau 26 degrees;
Chek Lap Kok 28 degrees;
Tsing Yi 25 degrees;
Shek Kong 25 degrees;
Tsuen Wan Ho Koon 26 degrees;
Tsuen Wan Shing Mun Valley 25 degrees;
Hong Kong Park 27 degrees;
Shau Kei Wan 27 degrees;
Kowloon City 26 degrees;
Happy Valley 27 degrees;
Wong Tai Sin 27 degrees;
Stanley 27 degrees;
Kwun Tong 27 degrees;
Sham Shui Po 26 degrees;
Kai Tak Runway Park 27 degrees;
Yuen Long Park 25 degrees;
Tai Mei Tuk 26 degrees.


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


Climatological Information for 4 Sep

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Bulletin updated at 03:45 HKT 04/Sep/2018

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

An anticyclone aloft is bringing generally fine weather to the coast of Guangdong.

At 2 a.m., Severe Typhoon Jebi was centred about 540 kilometres south-southwest of Osaka. It is forecast to move north-northeast at about 40 kilometres per hour towards Honshu, Japan.

Weather forecast for today

Mainly fine apart from isolated showers. The minimum temperature will be about 27 degrees. Hot during the day with a maximum temperature of around 32 degrees. Moderate southwesterly winds.

Outlook : Sunny periods on Wednesday. A few showers in the latter part of this week.


(The above forecast period is valid up to 23:59 HKT today, 04/09/2018; 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 21:00 HKT 03/Sep/2018

N0 WARNING.

GENERAL SITUATION AT 030900 UTC:
A SOUTHWESTERLY AIRSTREAM IS GENERALLY AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 031300 UTC:

HONG KONG= SW 4. ISOL SHOWERS AND TS. TEMP 27-32 C. =
KWANGTUNG= SW 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL E UP TO 2 M. =
TAIWAN STRAIT= SW 4-5, OCNL 6. ISOL SHOWERS. SEA UP TO 3 M. =
BASHI= W TO SW 5-6. ISOL SHOWERS. SEA 2-3 M. SWELL E 2-3 M. =
PRATAS= SW 4-5. ISOL SHOWERS. SEA UP TO 2 M. SWELL E 2 M. =
BALINTANG= W TO SW 5-6. ISOL SHOWERS. SEA 2-3 M. SWELL E 2 M. =
SCARBOROUGH= S TO SW 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL E TO NE 2 M. =
PARACEL= S 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL E 2 M. =
TONKIN= S 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
DANANG= S 4-5. ISOL 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.


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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
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    Bulletin issued at 03:30 HKT 04/Sep/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 3:30 a.m. on 04 September 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.
    Isolated showers and thunderstorms.
    Moderate seas.

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

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

    Shangchuan Dao:
    South to southwest force 4 to 5.
    Isolated showers and thunderstorms.
    Moderate seas.

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

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

    Waglan Island Wind west-southwest force 3
      Visibility 15 Kilometres

    Dongsha Wind west-southwest force 2
      Visibility 10 Kilometres

    Huangmaozhou Wind west-southwest force 3

    Macau Wind southwest force 1
      Visibility 16 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 04/SEP/2018
    (Next update at 9:00-9:30 HKT 04/SEP/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
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 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  240/5-10
                  TEMPO VRB/15G25 IN TS
       OFFSHORE:  240/10-15                            27-32
   B.   2000 FT:  240/10-15                            24
   C.   5000 FT:  280/10                               20
   D.  10000 FT:  300/10                               11
   E.  18000 FT:  080/10                               MS1
   F.  24000 FT:  100/20                               MS12
   G.  30000 FT:  080/35                               MS26
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY WITH A FEW SHOWERS. SUNNY PERIODS DURING
      THE DAY. ISOLATED THUNDERSTORMS LATER.
   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 2000 M IN TS.
   L. 0 DEG. C LEVEL: 17500 FT      10 DEG. C LEVEL(S) : 10400 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS.
   N. SEA STATE     : 1.0-1.5 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE SOUTHWESTERLY WINDS. SUNNY PERIODS. ISOLATED 
     SHOWERS AND 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.

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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 16:30 HKT on 03 Sep 18

    VHHK SIGMET 2 VALID 030430/030830 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2142 E11730 - N2000 E11130 - N2130 E11130 - N2300 E11512 - N2342 E11730 - N2142 E11730 TOP FL380 MOV NE 10KT NC= VHHK SIGMET 3 VALID 030830/031130 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2124 E11512 - N2042 E11500 - N2012 E11312 - N2048 E11224 - N2130 E11430 - N2124 E11512 TOP FL350 MOV ENE 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 04/Sep/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     30.5 C
Minimum Air Temperature                     25.6 C
Grass Minimum Temperature                   25.3 C
Relative Humidity                        70 - 93 Percent
Rainfall                                     0.3 mm 
Total rainfall since 1st January          1632.1 mm
Against an average of                     1940.1 mm

Other Stations                Min                  Max
King's Park                  25.5 C               30.2 C
Wong Chuk Hang               24.4 C               29.6 C
Ta Kwu Ling                  23.6 C               31.9 C
Lau Fau Shan                 24.3 C               30.4 C
Sha Tin                      24.8 C               31.5 C
Tuen Mun                     24.9 C               30.0 C
Tseung Kwan O                24.2 C               30.8 C
Sai Kung                     24.9 C               30.3 C
Cheung Chau                  24.3 C               29.1 C
Chek Lap Kok                 26.1 C               32.1 C
Tsing Yi                     24.8 C               30.3 C
Shek Kong                    24.3 C               32.2 C
Tsuen Wan Ho Koon            24.1 C               29.1 C
Tsuen Wan Shing Mun Valley   24.3 C               30.9 C
Hong Kong Park               25.1 C               30.7 C
Shau Kei Wan                 24.9 C               31.3 C
Kowloon City                 25.5 C               31.3 C
Happy Valley                 25.0 C               31.6 C
Wong Tai Sin                 25.3 C               31.7 C
Stanley                      24.9 C               29.1 C
Kwun Tong                    25.9 C               31.6 C
Sham Shui Po                 25.2 C               30.7 C
Kai Tak Runway Park          25.5 C               31.3 C
Yuen Long Park               23.8 C               32.9 C
Tai Mei Tuk               24.9 C               30.0 C

Duration of sunshine (King's Park):              5.1 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 10.
Sea surface temperature (Waglan Island):        25.9 C 

Yesterday's (03 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                             0.09
Kat O                               0.09
Yuen Ng Fan                         0.12
Tai Mei Tuk                         0.11
Sha Tau Kok                         0.10
Kwun Tong                           0.12
Sai Wan Ho                          0.09
King's Park                         0.14
Tsim Bei Tsui                       0.13
Cape D'Aguilar                      0.12
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 03 Sep
     2003copy right image | Important notices | Privacy policy Last revision date: <04 Sep 2018> 

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