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Bulletin issued at 10:16 HKT 23/Aug/2018

At 10 a.m. at the Hong Kong Observatory the air temperature was 29 degrees Celsius and the relative humidity 86 per cent.
During the past hour the mean UV Index recorded at King's Park was 2. The intensity of UV radiation was low.

Please be reminded that:

The Thunderstorm Warning was issued at 10:15 a.m. It will remain effective until 11:30 a.m. today. Isolated thunderstorms are expected to occur over Hong Kong.

The air temperatures at other places were:

King's Park 29 degrees;
Wong Chuk Hang 29 degrees;
Ta Kwu Ling 28 degrees;
Lau Fau Shan 28 degrees;
Tai Po 29 degrees;
Sha Tin 29 degrees;
Tuen Mun 28 degrees;
Tseung Kwan O 29 degrees;
Sai Kung 30 degrees;
Cheung Chau 28 degrees;
Chek Lap Kok 29 degrees;
Tsing Yi 28 degrees;
Shek Kong 28 degrees;
Tsuen Wan Ho Koon 26 degrees;
Tsuen Wan Shing Mun Valley 27 degrees;
Hong Kong Park 28 degrees;
Shau Kei Wan 29 degrees;
Kowloon City 28 degrees;
Happy Valley 30 degrees;
Wong Tai Sin 30 degrees;
Stanley 30 degrees;
Kwun Tong 30 degrees;
Sham Shui Po 28 degrees;
Kai Tak Runway Park 29 degrees;
Yuen Long Park 29 degrees;
Tai Mei Tuk 28 degrees.

Between 8:45 and 9:45 a.m., the rainfall recorded in various regions were:

Tsuen Wan 0 to 7 mm;
Kwai Tsing 0 to 4 mm;
Tai Po 0 to 3 mm;
Sha Tin 0 to 2 mm;
Central & Western District 0 to 1 mm;
Islands District 0 to 1 mm;
Yuen Long 0 to 1 mm.


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


Climatological Information for 23 Aug

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 09:45 HKT 23/Aug/2018

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

Showers are affecting the coast of Guangdong and the northern part of the South China Sea. Besides, the area of low pressure near Taiwan is bringing unsettled weather to the region.

Severe Typhoon Cimaron has weakened into a typhoon. At 10 a.m., Cimaron was centred about 420 kilometres east-southeast of Kagoshima. It is forecast to move north-northwest at about 32 kilometres per hour towards Japan. Meanwhile, Typhoon Soulik was centred about 100 kilometres west of Jeju. It is forecast to move north or north-northeast at about 12 kilometres per hour towards the vicinity of the Korean Peninsula.

Weather forecast for today

Sunny intervals. A few showers and isolated thunderstorms. Light winds.

Outlook : Still some showers in the next few days.


(The above forecast period is valid up to 23:59 HKT today, 23/08/2018; 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 09:00 HKT 23/Aug/2018

N0 WARNING.

GENERAL SITUATION AT 222100 UTC:
A SOUTHWESTERLY AIRSTREAM IS GENERALLY AFFECTING THE FORECAST AREAS. LOW 994 HPA 22N 120E NE SLOWLY INTST NC.

MARINE FORECAST FOR 24 HOURS FROM 230100 UTC:

HONG KONG= W TO SW 3-4. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS.. TEMP 31-27 C. =
KWANGTUNG= W TO SW 4-5, OCNL 6 IN E. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M, UP TO 3 M IN E. SWELL SW UP TO 2 M. =
TAIWAN STRAIT= NE 5-6, BEC SW 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL SW 2 M. =
BASHI= SW 6-7. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL SW 2 M. =
PRATAS= SW 5-6, OCNL 7. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL SW 2 M. =
BALINTANG= SW 6-7. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL SW 2 M. =
SCARBOROUGH= SW 6-7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL SW 2 M. =
PARACEL= SW 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL S TO SW 2 M. =
TONKIN= S TO SW 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL S TO SW 2 M. =
DANANG= SW 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 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 09:30 HKT 23/Aug/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 23 August 2018

    Warnings:
    Strong winds in Nan'ao.

    Weather Situation:
    Showers and thunderstorms are affecting the south China coastal waters. Besides, the area of low pressure near Taiwan is bringing unsettled weather to the region.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    West to southwest force 3 to 4.
    Isolated squally showers and thunderstorms.
    Slight to moderate seas.

    Nan'ao:
    West to southwest force 4 to 5, occasionally force 6.
    Isolated squally showers and thunderstorms.
    Moderate to rough seas.

    Shanwei:
    West to southwest force 4 to 5.
    Isolated squally showers and thunderstorms.
    Moderate seas.

    South of Hong Kong and Shangchuan Dao:
    West to southwest force 4.
    Isolated squally 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-northwest force 3

    Shantou Wind west force 2
      Visibility 28 Kilometres

    Dongsha Wind west force 3
      Visibility 9 Kilometres in rain

    Huangmaozhou Wind west-northwest force 4

    Macau Wind west-northwest force 1
      Visibility 24 Kilometres

    Xisha Wind south-southwest force 4
      Visibility 9 Kilometres

  • Explanation of Seas or Sea Waves
  • Explanation of Swells
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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 09:00 HKT 23/AUG/2018
    (Next update at 12:30 HKT 23/AUG/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     SHOWERS ARE AFFECTING THE COAST OF GUANGDONG AND
     THE NORTHERN PART OF THE SOUTH CHINA SEA.
     BESIDES, THE AREA OF LOW PRESSURE NEAR TAIWAN IS
     BRINGING UNSETTLED WEATHER TO THE REGION.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  250/5-10
                  TEMPO VRB/20G30 IN TS
       OFFSHORE:  250/15                               28-33
   B.   2000 FT:  320/15, OCNL 20                      25
   C.   5000 FT:  330/15                               21
   D.  10000 FT:  340/10                               12
   E.  18000 FT:  080/10                               MS2
   F.  24000 FT:  040/10                               MS11
   G.  30000 FT:  350/10                               MS22
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      SUNNY INTERVALS WITH A FEW SHOWERS AND SQUALLY
      THUNDERSTORMS.  LOCALIZED HAZE/MIST.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1200 FT  SCT 3000 FT  BKN 10000 FT.  TEMPO
      FEW CB 1000 FT  SCT 2000 FT  BKN 4000 FT.
   K. VISIBILITY    : 7 KM.  TEMPO 4000 M IN SHOWERS/HAZE/MIST.
                      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.
                      MOD OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 1.5 M         SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     LIGHT TO MODERATE WEST TO SOUTHWESTERLY WINDS.
     MAINLY CLOUDY WITH A FEW 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.

    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 10:33 HKT on 23 Aug 18

    VHHK SIGMET 1 VALID 230240/230640 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2100 E11730 - N1824 E11518 - N1930 E11300 - N2200 E11554 - N2318 E11730 - N2100 E11730 TOP FL480 STNR NC= VHHK SIGMET 9 VALID 222240/230240 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2100 E11730 - N1906 E11600 - N1948 E11406 - N2200 E11554 - N2248 E11730 - N2100 E11730 TOP FL480 STNR 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 23/Aug/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     31.8 C
Minimum Air Temperature                     24.7 C
Grass Minimum Temperature                   23.9 C
Relative Humidity                        68 - 93 Percent
Rainfall                                    26.4 mm 
Total rainfall since 1st January          1349.1 mm
Against an average of                     1800.0 mm

Other Stations                Min                  Max
King's Park                  24.3 C               32.0 C
Wong Chuk Hang               24.7 C               31.5 C
Ta Kwu Ling                  23.8 C               33.2 C
Lau Fau Shan                 23.3 C               32.1 C
Tai Po                       24.5 C               33.0 C
Sha Tin                      24.5 C               33.6 C
Tuen Mun                     24.4 C               32.9 C
Tseung Kwan O                24.5 C               33.0 C
Sai Kung                     25.2 C               32.5 C
Cheung Chau                  24.3 C               31.9 C
Chek Lap Kok                 24.2 C               33.3 C
Tsing Yi                     24.7 C               32.4 C
Shek Kong                    24.3 C               34.0 C
Tsuen Wan Ho Koon            23.8 C               30.8 C
Tsuen Wan Shing Mun Valley   24.4 C               32.8 C
Hong Kong Park               24.0 C               32.7 C
Shau Kei Wan                 24.7 C               33.2 C
Kowloon City                 23.5 C               33.0 C
Happy Valley                 24.9 C               33.4 C
Wong Tai Sin                 23.9 C               33.5 C
Stanley                      24.9 C               31.1 C
Kwun Tong                    24.3 C               33.3 C
Sham Shui Po                 24.3 C               33.4 C
Kai Tak Runway Park          24.2 C               32.9 C
Yuen Long Park               24.2 C               34.3 C
Tai Mei Tuk               23.2 C               32.4 C

Duration of sunshine (King's Park):              8.5 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 9.
 

Yesterday's (22 Aug 2018) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.09 to
0.15 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                               0.10
Yuen Ng Fan                         0.13
Tai Mei Tuk                         0.13
Sha Tau Kok                         0.11
Kwun Tong                           0.13
Sai Wan Ho                          0.09
King's Park                         0.15
Tsim Bei Tsui                       0.14
Cape D'Aguilar                      0.14
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 22 Aug
     2003copy right image | Important notices | Privacy policy Last revision date: <23 Aug 2018> 

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