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Bulletin issued at 09:02 HKT 17/Aug/2019

At 9 a.m. at the Hong Kong Observatory the air temperature was 30 degrees Celsius and the relative humidity 78 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 has been issued. It will remain effective until noon today. Isolated thunderstorms are expected to occur over Southern Waters and Islands of Hong Kong.

The air temperatures at other places were:

King's Park 30 degrees;
Wong Chuk Hang 30 degrees;
Ta Kwu Ling 29 degrees;
Lau Fau Shan 29 degrees;
Tai Po 30 degrees;
Sha Tin 31 degrees;
Tuen Mun 30 degrees;
Tseung Kwan O 29 degrees;
Sai Kung 30 degrees;
Cheung Chau 29 degrees;
Chek Lap Kok 30 degrees;
Tsing Yi 30 degrees;
Shek Kong 30 degrees;
Tsuen Wan Ho Koon 28 degrees;
Tsuen Wan Shing Mun Valley 30 degrees;
Hong Kong Park 30 degrees;
Shau Kei Wan 30 degrees;
Kowloon City 30 degrees;
Happy Valley 31 degrees;
Wong Tai Sin 31 degrees;
Stanley 30 degrees;
Kwun Tong 30 degrees;
Sham Shui Po 31 degrees;
Kai Tak Runway Park 30 degrees;
Yuen Long Park 31 degrees;
Tai Mei Tuk 31 degrees.

Between 7:45 and 8:45 a.m., the rainfall recorded in various regions were:

North District 0 to 1 mm.

Between midnight and 9 a.m. the minimum temperature was 27.1 degrees Celsius at the Hong Kong Observatory.


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


Climatological Information for 17 Aug

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Bulletin updated at 08:45 HKT 17/Aug/2019

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

A southwesterly airstream is bringing thundery showers to the coast of Guangdong.

Weather forecast for today

Mainly cloudy with a few showers and squally thunderstorms. Sunny intervals in the morning. More showers later. The maximum temperature will be around 31 degrees. Moderate southwesterly winds.

Outlook : Showers and squally thunderstorms in the next couple of days. Showers will be heavy at times.


(The above forecast period is valid up to 23:59 HKT today, 17/08/2019; 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 17/Aug/2019

N0 WARNING.

GENERAL SITUATION AT 162100 UTC:
A SOUTHWESTERLY AIRSTREAM IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 170100 UTC:

HONG KONG= SW 4-5. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL SW 2 M. TEMP 31-26 C. =
KWANGTUNG= SW 4-5. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL SW 2-3 M. =
TAIWAN STRAIT= SW 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL SW 2-3 M. =
BASHI= W TO SW 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL SW 3 M. =
PRATAS= SW 4-5, OCNL 6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 3 M. SWELL SW 3 M. =
BALINTANG= W TO SW 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL SW 3 M. =
SCARBOROUGH= SW 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL SW 3 M. =
PARACEL= SW 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL SW 3 M. =
TONKIN= SW 4-5. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
DANANG= S TO SW 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.


  • 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 17/Aug/2019

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 17 August 2019

    Weather Situation:
    A southwesterly airstream is bringing thundery showers to the coastal waters of Guangdong.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    Southwest force 4 to 5.
    Scattered showers and squally thunderstorms.
    Moderate seas.

    Nan'ao, Shanwei, South of Hong Kong and Shangchuan Dao:
    Southwest force 4 to 5.
    Scattered showers and squally thunderstorms.
    Moderate seas.

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

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

    Waglan Island Wind west-northwest force 2
      Visibility 48 Kilometres

    Shantou Wind west-southwest force 1
      Visibility 14 Kilometres

    Dongsha Wind southwest force 4
      Visibility 10 Kilometres

    Huangmaozhou Wind west force 4

    Xisha Wind south-southwest force 4
      Visibility 18 Kilometres

  • Explanation of Seas or Sea Waves
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  • Visibility Readings in Hong Kong Waters
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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 09:30 HKT 17/AUG/2019
    (Next update at 12:30 HKT 17/AUG/2019)
    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 BRINGING THUNDERY
     SHOWERS TO THE COAST OF GUANGDONG.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  250/10-15
                  TEMPO VRB/15G25 IN TS
       OFFSHORE:  220/15, OCNL 20                      29-33
   B.   2000 FT:  240/15-20                            24
   C.   5000 FT:  250/20-25                            19
   D.  10000 FT:  260/25                               11
   E.  18000 FT:  260/20                               MS2
   F.  24000 FT:  260/10                               MS11
   G.  30000 FT:  350/5-10                             MS23
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      MAINLY CLOUDY, SUNNY INTERVALS IN THE MORNING.
      ISOLATED SHOWERS AND SQUALLY THUNDERSTORMS.
      SHOWERS WILL BE HEAVY AT TIMES.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT  SCT 2500 FT
      TEMPO FEW CB 800 FT SCT 1500 FT BKN 4000 FT
   K. VISIBILITY    : 9 KM. TEMPO 3000 M IN SHOWERS. 
                      TEMPO 1500 M IN TS.
   L. 0 DEG. C LEVEL: 17000 FT      10 DEG. C LEVEL(S) : 11400 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS. 
                      MOD OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 1.5-2.5 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE SOUTHWESTERLY WINDS. CLOUDY WITH
     SHOWERS AND SQUALLY THUNDERSTORMS. SHOWERS WILL
     BE HEAVY AT TIMES.=

    ===================================================================
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 05:56 HKT on 17 Aug 19

    VHHK SIGMET 8 VALID 162200/170200 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2149 E11215 - N2324 E11603 - N2042 E11702 - N1957 E11337 - N2149 E11215 TOP FL420 MOV NE 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 17/Aug/2019 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     32.0 C
Minimum Air Temperature                     27.6 C
Grass Minimum Temperature                   26.9 C
Relative Humidity                        74 - 88 Percent
Rainfall                                     1.1 mm 
Total rainfall since 1st January          1644.6 mm
Against an average of                     1707.4 mm

Other Stations                Min                  Max
King's Park                  27.2 C               32.4 C
Wong Chuk Hang               26.1 C               30.4 C
Ta Kwu Ling                  26.9 C               34.1 C
Lau Fau Shan                 25.5 C               33.6 C
Tai Po                       25.7 C               33.2 C
Sha Tin                      26.8 C               32.6 C
Tuen Mun                     25.9 C               32.8 C
Tseung Kwan O                26.4 C               34.1 C
Sai Kung                     25.7 C               34.1 C
Cheung Chau                  26.4 C               32.1 C
Chek Lap Kok                 26.1 C               33.9 C
Tsing Yi                     25.2 C               32.1 C
Shek Kong                    25.5 C               33.4 C
Tsuen Wan Ho Koon            24.9 C               31.0 C
Tsuen Wan Shing Mun Valley   25.7 C               32.5 C
Hong Kong Park               25.8 C               31.4 C
Shau Kei Wan                 26.9 C               32.8 C
Kowloon City                 26.6 C               32.3 C
Happy Valley                 27.4 C               33.2 C
Wong Tai Sin                 26.0 C               32.2 C
Stanley                      26.4 C               31.3 C
Kwun Tong                    26.5 C               32.2 C
Sham Shui Po                 26.1 C               32.7 C
Kai Tak Runway Park          27.4 C               33.1 C
Yuen Long Park               26.1 C               34.6 C
Tai Mei Tuk               26.2 C               34.5 C

Duration of sunshine (King's Park):              3.8 H
The mean UV index recorded at King's Park yesterday was 3,
the UV intensity was Moderate.
The maximum UV index for yesterday was 9.
 

Yesterday's (16 Aug 2019) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.09 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                               0.11
Yuen Ng Fan                         0.12
Tai Mei Tuk                         0.11
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                        0.12

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 16 Aug
     2003copy right image | Important notices | Privacy policy Last revision date: <17 Aug 2019> 

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