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Bulletin issued at 10:20 HKT 01/Sep/2018

At 10 a.m. at the Hong Kong Observatory the air temperature was 27 degrees Celsius and the relative humidity 95 per cent.
During the past hour the mean UV Index recorded at King's Park was 0.6. The intensity of UV radiation was low.

Widespread heavy rain may affect Hong Kong in a couple of hours. Members of the public should be on the alert.


Please be reminded that:

The Thunderstorm Warning has been issued. It will remain effective until noon today. Isolated thunderstorms are expected to occur over Hong Kong.

The air temperatures at other places were:

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

Between 8:45 and 9:45 a.m., lightning was detected within New Territories East. The rainfall recorded in various regions were:

Tai Po 0 to 21 mm;
Sha Tin 6 to 20 mm;
Wong Tai Sin 14 to 20 mm;
Kowloon City 2 to 16 mm;
Sai Kung 0 to 13 mm;
Islands District 0 to 11 mm;
Tuen Mun 0 to 10 mm;
Kwun Tong 0 to 9 mm;
Yau Tsim Mong 6 to 9 mm;
Sham Shui Po 1 to 4 mm;
Central & Western District 0 to 3 mm;
Wan Chai 1 to 2 mm;
Eastern District 0 to 2 mm;
Southern District 0 to 2 mm;
Tsuen Wan 0 to 2 mm;
North District 0 to 1 mm.


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


Climatological Information for 1 Sep

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Automatic Regional Weather Forecast in Hong Kong & Pearl River Delta Region

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Bulletin updated at 10:20 HKT 01/Sep/2018

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

A trough of low pressure is bringing showers and thunderstorms to the coastal areas of Guangdong.

At 10 a.m., Super Typhoon Jebi was centred about 1680 kilometres south of Osaka. It is forecast to move northwest at about 20 kilometres per hour across the western North Pacific.

Weather forecast for today

Mainly cloudy with showers. Showers will be heavy with thunderstorms at first. Moderate southerly winds.

Outlook : The weather will improve gradually in the next couple of days.


(The above forecast period is valid up to 23:59 HKT today, 01/09/2018; Regular update at : around 45 minutes past each hour, 16:15 HKT and 23:15 HKT)

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Marine Weather Information and Forecast

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MARINE FORECAST
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Marine Forecast

Weather Information for the Marine Community

Bulletin issued at 09:00 HKT 01/Sep/2018

N0 WARNING.

GENERAL SITUATION AT 312100 UTC:
TROUGH 21N 107E 24N 115E QSTNR.

MARINE FORECAST FOR 24 HOURS FROM 010100 UTC:

HONG KONG= S 4, OCNL 5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. TEMP 30-27 C. =
KWANGTUNG= S 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
TAIWAN STRAIT= S TO SW 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
BASHI= E 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL SW UP TO 2 M. =
PRATAS= S TO SE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL SW UP TO 2 M. =
BALINTANG= E 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL SW UP TO 2 M. =
SCARBOROUGH= E TO NE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL S TO SW 2 M. =
PARACEL= S 4-5, OCNL 6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 3 M. SWELL S TO SW 2 M. =
TONKIN= S 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. =
DANANG= S 4-5, OCNL 6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 3 M. SWELL S TO SW 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 10:30 HKT 01/Sep/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 10:30 a.m. on 01 September 2018

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

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    South force 4, occasionally force 5.
    Isolated heavy squally showers and thunderstorms.
    Moderate seas.

    Nan'ao and Shanwei:
    South to southwest force 4 to 5.
    Isolated squally showers and thunderstorms.
    Moderate seas.

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

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

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

    Waglan Island Wind south force 6
      Visibility 3000 Metres

    Shantou Wind east-northeast force 1
      Visibility 10 Kilometres

    Dongsha Wind south-southeast force 2
      Visibility 10 Kilometres

    Huangmaozhou Wind south force 4

    Macau Wind south-southeast force 2
      Visibility 6 Kilometres

    Xisha Wind south force 2
      Visibility 14 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
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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 09:30 HKT 01/SEP/2018
    (Next update at 12:30 HKT 01/SEP/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS AND SEV TURB.
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     A SOUTHERLY AIRSTREAM IS AFFECTING THE SOUTH
     CHINA COASTAL AREAS.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  160/10
                  TEMPO VRB/15G25 IN TS
       OFFSHORE:  160/15-20                            26-30
   B.   2000 FT:  160/20 OCNL 25                       24
   C.   5000 FT:  170/15                               18
   D.  10000 FT:  240/15                               10
   E.  18000 FT:  300/15                               MS3
   F.  24000 FT:  040/5                                MS12
   G.  30000 FT:  350/15                               MS25
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY WITH OCCASIONAL SHOWERS. ISOLATED
      THUNDERSTORMS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1200 FT  SCT 2500 FT  BKN 8000 FT.  TEMPO
      FEW CB 800 FT  SCT 1500 FT  BKN 4000 FT.
   K. VISIBILITY    : 9 KM.  TEMPO 4000 M IN SHOWERS. TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 16000 FT      10 DEG. C LEVEL(S) : 10000 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS AND NEAR HILLS. MOD OFFSHORE.
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE SOUTHERLY WINDS. MAINLY CLOUDY WITH
     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.

    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 08:40 HKT on 01 Sep 18

    VHHK SIGMET 1 VALID 010040/010440 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2230 E11430 - N2142 E11436 - N2030 E11148 - N2124 E11130 - N2212 E11312 - N2236 E11400 - N2230 E11430 TOP FL450 MOV NE 05KT NC=

    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 01/Sep/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     29.0 C
Minimum Air Temperature                     27.0 C
Grass Minimum Temperature                   26.1 C
Relative Humidity                        83 - 94 Percent
Rainfall                                     7.2 mm 
Total rainfall since 1st January          1590.0 mm
Against an average of                     1905.5 mm

Other Stations                Min                  Max
King's Park                  26.5 C               28.8 C
Wong Chuk Hang               27.0 C               28.3 C
Ta Kwu Ling                  25.2 C               29.3 C
Lau Fau Shan                 25.1 C               28.7 C
Tai Po                       26.3 C               28.8 C
Sha Tin                      26.5 C               29.7 C
Tuen Mun                     26.1 C               28.6 C
Tseung Kwan O                26.5 C               27.8 C
Sai Kung                     26.8 C               28.3 C
Cheung Chau                  26.2 C               27.4 C
Chek Lap Kok                 26.9 C               30.3 C
Tsing Yi                     26.3 C               29.2 C
Shek Kong                    25.8 C               29.8 C
Tsuen Wan Shing Mun Valley   26.0 C               28.7 C
Hong Kong Park               26.6 C               28.5 C
Shau Kei Wan                 26.6 C               28.6 C
Kowloon City                 26.3 C               28.5 C
Happy Valley                 27.4 C               29.1 C
Wong Tai Sin                 26.7 C               29.0 C
Stanley                      27.1 C               28.5 C
Kwun Tong                    27.0 C               28.7 C
Sham Shui Po                 25.7 C               29.2 C
Kai Tak Runway Park          26.8 C               28.9 C
Yuen Long Park               25.5 C               29.1 C
Tai Mei Tuk               25.6 C               28.5 C

Duration of sunshine (King's Park):              0.0 H
The mean UV index recorded at King's Park yesterday was 1,
the UV intensity was Low.
The maximum UV index for yesterday was 3.
 

Yesterday's (31 Aug 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                             0.09
Kat O                               0.09
Yuen Ng Fan                         0.12
Tai Mei Tuk                         0.12
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                      0.12
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 31 Aug
     2003copy right image | Important notices | Privacy policy Last revision date: <01 Sep 2018> 

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