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Bulletin issued at 06:02 HKT 31/Aug/2018

At 6 a.m. at the Hong Kong Observatory the air temperature was 28 degrees Celsius and the relative humidity 88 per cent.

Please be reminded that:

The Thunderstorm Warning has been issued. It will remain effective until 7:30 a.m. 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 25 degrees;
Lau Fau Shan 26 degrees;
Tai Po 27 degrees;
Sha Tin 27 degrees;
Tuen Mun 26 degrees;
Tseung Kwan O 27 degrees;
Sai Kung 27 degrees;
Cheung Chau 26 degrees;
Chek Lap Kok 28 degrees;
Tsing Yi 27 degrees;
Shek Kong 27 degrees;
Tsuen Wan Shing Mun Valley 27 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 28 degrees;
Kwun Tong 28 degrees;
Sham Shui Po 27 degrees;
Kai Tak Runway Park 28 degrees;
Yuen Long Park 25 degrees;
Tai Mei Tuk 26 degrees.

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

Tai Po 0 to 35 mm;
North District 1 to 10 mm;
Islands District 0 to 9 mm;
Yuen Long 0 to 6 mm;
Tuen Mun 0 to 6 mm;
Tsuen Wan 0 to 4 mm;
Sai Kung 0 to 3 mm;
Southern District 0 to 1 mm;
Kwai Tsing 1 mm;
Sha Tin 0 to 1 mm.


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


Climatological Information for 31 Aug

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Bulletin updated at 06:30 HKT 31/Aug/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. Locally, more than 10 millimetres of rainfall were recorded over Lantau Island and parts of New Territories.

Weather forecast for today

Mainly cloudy with occasional showers and a few thunderstorms. Showers will ease off with bright periods later. The maximum temperature will be around 30 degrees. Moderate southerly winds, fresh offshore at first.

Outlook : Sunny intervals and one or two showers over the weekend.


(The above forecast period is valid up to 23:59 HKT today, 31/08/2018; 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 30/Aug/2018

N0 WARNING.

GENERAL SITUATION AT 300900 UTC:
TROUGH 21N 106E 23N 112E 24N 115E QSTNR.

MARINE FORECAST FOR 24 HOURS FROM 301300 UTC:

HONG KONG= S 5-6. DOWN TO 1000 M IN SCT HEAVY SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL S TO SW 2 M. TEMP 26-30 C. =
KWANGTUNG= S 5-6, OCNL 7. DOWN TO 1000 M IN SCT HEAVY SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL S TO SW 2-3 M. =
TAIWAN STRAIT= S 5-6, OCNL 7. DOWN TO 1000 M IN SCT HEAVY SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL S TO SW 2-3 M. =
BASHI= S TO SE 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL S TO SW 2-3 M. =
PRATAS= S 5-6, OCNL 7. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL S TO SW 2-3 M. =
BALINTANG= S TO SE 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL S TO SW 2-3 M. =
SCARBOROUGH= S 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL S TO SW 2-3 M. =
PARACEL= S 5-6, OCNL 7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL S TO SW 2-3 M. =
TONKIN= S 6-7. DOWN TO 1000 M IN SCT HEAVY SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL S 2 M. =
DANANG= S 5-6, OCNL 7. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 4 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
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    Bulletin issued at 05:30 HKT 31/Aug/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 5:30 a.m. on 31 August 2018

    Warnings:
    Strong winds in all areas.

    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 5 to 6.
    Scattered heavy squally showers and thunderstorms.
    Moderate to rough seas.

    Nan'ao, Shanwei, South of Hong Kong and Shangchuan Dao:
    South force 5 to 6, occasionally force 7.
    Scattered heavy squally showers and thunderstorms.
    Moderate to rough seas.

    Outlook for the next 48 hours
    Southerly winds of force 4 to 5, occasionally force 6. Isolated squally showers and thunderstorms.

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

    Waglan Island Wind south force 6
      Visibility 12 Kilometres

    Shantou Wind east-northeast force 1
      Visibility 14 Kilometres

    Dongsha Wind south force 3
      Visibility 10 Kilometres

    Huangmaozhou Wind south force 5

    Xisha Wind south force 3
      Visibility 11 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 31/AUG/2018
    (Next update at 9:00-9:30 HKT 31/AUG/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS, SEV TURB AND SEV GUSTS.
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     A TROUGH OF LOW PRESSURE IS BRINGING UNSETTLED
     WEATHER TO 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:  180/10-15
                  TEMPO VRB/20G30 IN TS
       OFFSHORE:  180/20-25                            26-31
   B.   2000 FT:  160/20-25G35                         24
   C.   5000 FT:  190/20                               18
   D.  10000 FT:  220/25                               11
   E.  18000 FT:  220/30                               MS2
   F.  24000 FT:  220/20                               MS13
   G.  30000 FT:  120/10                               MS23
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      CLOUDY WITH ISOLATED SHOWERS AND 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    : 
      8 KM.  TEMPO 4000 M IN SHOWERS. TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 17000 FT    10 DEG. C LEVEL(S) : 11000 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS, 
                      OFFSHORE AND NEAR HILLS
   N. SEA STATE     : 3.0-4.0 M     SEA TEMPERATURE    : 26 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE SOUTHERLY WINDS, FRESH OFFSHORE AT
     FIRST . 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 03:05 HKT on 31 Aug 18

    VHHK SIGMET 3 VALID 301905/302130 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2236 E11700 - N2130 E11424 - N2242 E11418 - N2336 E11636 - N2342 E11654 - N2236 E11700 TOP FL460 MOV NNE 10KT 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 31/Aug/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     28.9 C
Minimum Air Temperature                     26.9 C
Grass Minimum Temperature                   26.2 C
Relative Humidity                        81 - 94 Percent
Rainfall                                     6.3 mm 
Total rainfall since 1st January          1582.8 mm
Against an average of                     1894.2 mm

Other Stations                Min                  Max
King's Park                  26.5 C               28.4 C
Wong Chuk Hang               26.8 C               28.3 C
Ta Kwu Ling                  24.8 C               28.0 C
Lau Fau Shan                 24.5 C               27.0 C
Tai Po                       25.9 C               29.0 C
Sha Tin                      26.3 C               29.2 C
Tuen Mun                     26.0 C               28.0 C
Tseung Kwan O                26.3 C               28.2 C
Sai Kung                     26.7 C               28.8 C
Cheung Chau                  25.6 C               27.2 C
Chek Lap Kok                 27.6 C               29.9 C
Tsing Yi                     27.1 C               29.0 C
Shek Kong                    26.8 C               28.8 C
Tsuen Wan Ho Koon            25.7 C               26.7 C
Tsuen Wan Shing Mun Valley   26.0 C               28.5 C
Hong Kong Park               26.3 C               28.4 C
Shau Kei Wan                 26.9 C               28.5 C
Kowloon City                 26.4 C               28.4 C
Happy Valley                 27.4 C               28.8 C
Wong Tai Sin                 26.4 C               29.0 C
Stanley                      27.2 C               28.9 C
Kwun Tong                    27.1 C               29.0 C
Sham Shui Po                 26.5 C               28.8 C
Kai Tak Runway Park          27.1 C               28.9 C
Yuen Long Park               25.6 C               26.9 C
Tai Mei Tuk               25.5 C               27.3 C

Duration of sunshine (King's Park):              0.0 H
The mean UV index recorded at King's Park yesterday was 0.9,
the UV intensity was Low.
The maximum UV index for yesterday was 3.
 

Yesterday's (30 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                           0.08
Tap Mun                             0.09
Kat O                               0.10
Yuen Ng Fan                         0.12
Tai Mei Tuk                         0.12
Sha Tau Kok                         0.10
Kwun Tong                           0.13
Sai Wan Ho                          0.09
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 30 Aug
     2003copy right image | Important notices | Privacy policy Last revision date: <31 Aug 2018> 

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