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Bulletin issued at 16:31 HKT 01/Sep/2018

At 4 p.m. at the Hong Kong Observatory the air temperature was 26 degrees Celsius and the relative humidity 96 per cent.
During the past hour the mean UV Index recorded at King's Park was 0.7. The intensity of UV radiation was low.

Please be reminded that:

The Thunderstorm Warning has been issued. It will remain effective until 5:15 p.m. today. Thunderstorms are expected to occur over Lantau.

The air temperatures at other places were:

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

Between 2:45 and 3:45 p.m., lightning was detected within New Territories East, Hong Kong and Kowloon. The rainfall recorded in various regions were:

Eastern District 0 to 2 mm;
Sai Kung 0 to 2 mm;
Islands District 0 to 1 mm;
North District 0 to 1 mm;
Tai Po 0 to 1 mm;
Central & Western District 0 to 1 mm;
Southern District 0 to 1 mm;
Sha Tin 0 to 1 mm;
Wan Chai 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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Bulletin updated at 16:15 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 4 p.m., Super Typhoon Jebi was centred about 1570 kilometres south of Osaka. It is forecast to move northwest at about 20 kilometres per hour across the western North Pacific.

Weather forecast for tonight and tomorrow

Mainly cloudy with occasional showers and isolated thunderstorms. Showers will ease off and there will be sunny intervals later tomorrow. Temperatures will range between 25 and 29 degrees. Light to moderate southerly winds.

Outlook : Sunny periods and one or two showers in the following couple of days.


(The above forecast period is valid up to 23:59 HKT tomorrow, 02/09/2018; 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 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.


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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 16:30 HKT 01/Sep/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 4:30 p.m. on 01 September 2018

    Weather Situation:
    A trough of low pressure is bringing unsettled weather to the south China coastal waters.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    South force 4, occasionally force 5.
    Isolated 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 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 east force 1
      Visibility 7 Kilometres

    Shantou Wind southeast force 2
      Visibility 23 Kilometres

    Dongsha Wind south-southwest force 1
      Visibility 10 Kilometres

    Huangmaozhou Wind southwest force 2

    Macau Wind south-southwest force 1
      Visibility 8 Kilometres

    Xisha Wind south-southwest force 3
      Visibility 18 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 12:30 HKT 01/SEP/2018
    (Next update at 17:30 HKT 01/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 SOUTHERLY AIRSTREAM IS AFFECTING THE SOUTH
     CHINA COASTAL AREAS.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1300 TO 2300 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  160/10
                  TEMPO VRB/15G25 IN TS
       OFFSHORE:  160/15-20                            30-26
   B.   2000 FT:  160/15-20                            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 SHOWERS AND ISOLATED
      THUNDERSTORMS. SHOWERS WILL BE HEAVY AT FIRST.
   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    : 7 KM.  TEMPO 3000 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. MOD OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 26 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE SOUTHERLY WINDS. MAINLY CLOUDY WITH
     ISOLATED SHOWERS AN 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 16:42 HKT on 01 Sep 18

    VHHK SIGMET 2 VALID 010840/011240 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2030 E11448 - N2030 E11130 - N2130 E11130 - N2306 E11518 - N2312 E11548 - N2030 E11448 TOP FL450 MOV NE 05KT NC= VHHK SIGMET 3 VALID 010842/011242 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2030 E11448 - N2030 E11130 - N2130 E11130 - N2306 E11518 - N2312 E11548 - N2030 E11448 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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