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Bulletin issued at 09:02 HKT 19/Aug/2016

At 9 a.m. at the Hong Kong Observatory the air temperature was 28 degrees Celsius and the relative humidity 90 per cent.
During the past hour the mean UV Index recorded at King's Park was 2. The intensity of UV radiation was low.

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 29 degrees;
Tai Po 27 degrees;
Sha Tin 28 degrees;
Tuen Mun 28 degrees;
Tseung Kwan O 28 degrees;
Sai Kung 28 degrees;
Cheung Chau 27 degrees;
Chek Lap Kok 29 degrees;
Tsing Yi 30 degrees;
Shek Kong 31 degrees;
Tsuen Wan Ho Koon 27 degrees;
Tsuen Wan Shing Mun Valley 30 degrees;
Hong Kong Park 28 degrees;
Shau Kei Wan 29 degrees;
Kowloon City 29 degrees;
Happy Valley 31 degrees;
Wong Tai Sin 29 degrees;
Stanley 29 degrees;
Kwun Tong 29 degrees;
Sham Shui Po 30 degrees;
Kai Tak Runway Park 29 degrees;
Yuen Long Park 29 degrees.

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

Wan Chai 0 to 1 mm.

Between midnight and 9 a.m. the minimum temperature was 26.5 degrees Celsius at the Hong Kong Observatory.

Here is the information on Tropical Storm Dianmu at 9 a.m.:
Location: 20.4 degrees north, 107.6 degrees east.


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


Climatological Information for 19 Aug

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


Local Weather Forecast
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Local Weather Forecast

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

Current Weather | Regional Temperature Forecast in HK |  9-day Weather Forecast
UV Index Forecast |  Weather Information for South China Coastal Waters

Bulletin updated at 08:45 HKT 19/Aug/2016

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

The outer rainbands of Tropical Storm Dianmu are bringing squally showers to the vicinity of Pearl River Estuary and the northern part of the South China Sea.

At 8 a.m., Dianmu was centred about 220 kilometres east-southeast of Hanoi. It is forecast to move west at about 20 kilometres per hour across Beibu Wan.

Weather forecast for today

Sunny intervals and a few showers. The maximum temperature will be about 30 degrees. Moderate to fresh east to southeasterly winds. There will be swells.

Outlook : Sunny periods and isolated showers in the next few days.


(The above forecast period is valid up to 23:59 HKT today, 19/08/2016; Regular update at : around 45 minutes past each hour, 16:15 HKT and 23:15 HKT)

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MARINE FORECAST
Traditional Chinese Simplified Chinese

Marine Forecast

Weather Information for the Marine Community

Bulletin issued at 09:05 HKT 19/Aug/2016

GALE WARNING AREA: TONKIN.

GENERAL SITUATION AT 182100 UTC:
FOR DETAILS ON TROPICAL STORM DIANMU (1608), PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS.

MARINE FORECAST FOR 24 HOURS FROM 190105 UTC:

HONG KONG= SE 5-6, SW 4-5 LATER. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL S TO SW 2 M. TEMP 30-28 C. =
KWANGTUNG= S TO SE 6-7, SW 4-5 LATER. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-4 M. SWELL S TO SW 2-3 M. =
TAIWAN STRAIT= S TO SW 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL SW 2 M. =
BASHI= W TO SW 4-5, OCNL 6 AT FIRST. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2 M, UP TO 3 M AT FIRST. SWELL SW 2 M. =
PRATAS= S TO SW 5-6, OCNL 7 AT FIRST. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M, UP TO 4 M AT FIRST. SWELL S TO SW 2-3 M. =
BALINTANG= W TO SW 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL SW 2 M. =
SCARBOROUGH= S TO SW 5-6, UP TO 7 AT FIRST. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M, UP TO 4 M AT FIRST. SWELL SW 2-3 M. =
PARACEL= S TO SW 5-6, 7 AT FIRST. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M, 4 M AT FIRST. SWELL SW 2-3 M. =
TONKIN= CYCLONIC 8-9, S 6-7 LATER. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 3-8 M. SWELL S 2 M. =
DANANG= SW 6-7, 4-5 LATER. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 2-4 M. SWELL S 2-3 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 19/Aug/2016

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 19 August 2016

    Warnings:
    Strong winds in all areas.

    Weather Situation:
    At 9 a.m., Tropical Storm Dianmu with maximum sustained winds of about 85 kilometres per hour near its centre was located at 20.4 degrees north, 107.6 degrees east. It is forecast to move west at about 20 kilometres per hour crossing Beibu Wan.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    Southeast force 5 to 6, becoming southwest force 4 to 5 later.
    Scattered squally showers and thunderstorms.
    Moderate to rough seas.

    Nan'ao, Shanwei and South of Hong Kong:
    South to southeast force 5 to 6, becoming southwest force 4 to 5 later.
    Scattered squally showers and thunderstorms.
    Moderate to rough seas.

    Shangchuan Dao:
    South to southeast force 6 to 7, becoming southwest force 4 to 5 later.
    Scattered squally showers and thunderstorms.
    Rough seas.

    Outlook for the next 48 hours
    Southwesterly winds of force 5 to 6, becoming easterly winds of force 4 to 5 later. Scattered squally showers and thunderstorms.

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

    Waglan Island Wind east force 3
      Visibility 13 Kilometres

    Shantou Wind east force 1
      Visibility 15 Kilometres in showers

    Dongsha Wind south force 2
      Visibility 10 Kilometres

    Huangmaozhou Wind east-southeast force 4

    Macau Wind east force 3
      Visibility 12 Kilometres

    Xisha Wind south-southwest force 4
      Visibility 13 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
  • Tidal Information

    • WEATHER FORECAST FOR LOCAL AVIATION
    Traditional Chinese Simplified Chinese

    Weather Forecast for Local Aviation

    Bulletin issued at 09:30 HKT 19/AUG/2016
    (Next update at 17:30 HKT 19/AUG/2016)
    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 :
     THE OUTER RAINBANDS OF TROPICAL STORM DIANMU ARE
     BRINGING SQUALLY SHOWERS TO THE VICINITY OF
     PEARL RIVER ESTUARY AND THE NORTHERN PART OF THE
     SOUTH CHINA SEA.
     AT 9 A.M., DIANMU WAS CENTRED NEAR 20.4 DEGREES
     NORTH, 107.6 DEGREES EAST. IT IS FORECAST TO
     MOVE WEST AT ABOUT 11 KNOTS ACROSS BEIBU WAN.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  140/10-15
                  TEMPO VRB/20G30 IN TS
       OFFSHORE:  140/20 OCNL 25                       29-31
   B.   2000 FT:  140/20 OCNL 25                       24
   C.   5000 FT:  160/20                               20
   D.  10000 FT:  160/20                               12
   E.  18000 FT:  120/15                               MS2
   F.  24000 FT:  090/15                               MS11
   G.  30000 FT:  080/10                               MS27
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY WITH A FEW SHOWERS AND ISOLATED
      THUNDERSTORMS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT  SCT 3000 FT. TEMPO FEW CB 800 FT
      SCT 2000 FT  BKN 4000 FT.
   K. VISIBILITY    : 9 KM.  TEMPO 3000 M IN SHOWERS.  TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 17000 FT      10 DEG. C LEVEL(S) : 12000 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS, OFFSHORE AND  NEAR HILLS
   N. SEA STATE     : 2.0-3.5 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE EAST TO SOUTHEASTERLY WINDS. MAINLY
     CLOUDY WITH A FEW 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
    Traditional Chinese Simplified Chinese

    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 06:57 HKT on 19 Aug 16

    VHHK SIGMET 13 VALID 182300/190300 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1754 E11254 - N1930 E11130 - N2124 E11130 - N2230 E11342 - N2312 E11606 - N2012 E11600 - N1754 E11254 TOP FL450 MOV W 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

    Tropical Cyclone Warning |  Track and Positions of Tropical Cyclones
    Current Weather |  Local Weather Forecast |  9-day Weather Forecast
    South China Coastal Waters |  Marine Forecast
    Severe Weather Information Centre

    Bulletin issued at 09:30 HKT 19/Aug/2016


    Tropical Cyclone Warning

    At 190000 UTC, Tropical Storm Dianmu (1608) with central pressure 982 hectopascals was centred within 60 nautical miles of two zero point four degrees north (20.4 N) one zero seven point eight degrees east (107.8 E) and is forecast to move west at about 12 knots for the next 24 hours.

    Maximum winds near the centre are estimated to be 45 knots.

    Radius of over 33 knot winds 60 nautical miles over southern semicircle, 30 nautical miles elsewhere.
    Radius of over 2 metre waves 180 nautical miles.

    Forecast position and intensity at 200000 UTC
    Dissipated over land.



    The Hong Kong Observatory's tropical cyclone warnings for shipping are issued about one and a half hours after the time of observation. They incorporate additional information derived from surface and upper-air data and may therefore be slightly different from the real-time satellite or radar-based positions given in the hourly bulletins for public.

    While the forecast positions and track indicate the most likely future path of the tropical cyclone, they may deviate from the actual path taken by the storm.

    Tropical Cyclone Track
    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 19/Aug/2016 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     28.7 C
Minimum Air Temperature                     25.9 C
Grass Minimum Temperature                   25.3 C
Relative Humidity                        89 - 98 Percent
Rainfall                                    50.9 mm 
Total rainfall since 1st January          1874.8 mm
Against an average of                     1727.8 mm

Other Stations                Min                  Max
King's Park                  25.3 C               29.2 C
Wong Chuk Hang               25.9 C               29.2 C
Ta Kwu Ling                  25.8 C               29.9 C
Lau Fau Shan                 25.2 C               29.3 C
Tai Po                       25.6 C               27.9 C
Sha Tin                      26.4 C               29.8 C
Tuen Mun                     25.9 C               29.1 C
Tseung Kwan O                25.7 C               28.1 C
Sai Kung                     25.6 C               28.6 C
Cheung Chau                  25.0 C               26.9 C
Chek Lap Kok                 26.5 C               30.6 C
Tsing Yi                     26.0 C               29.9 C
Shek Kong                    25.8 C               30.3 C
Tsuen Wan Ho Koon            24.9 C               26.8 C
Tsuen Wan Shing Mun Valley   25.6 C               29.6 C
Hong Kong Park               25.6 C               29.0 C
Shau Kei Wan                 25.2 C               28.3 C
Kowloon City                 25.4 C               29.1 C
Happy Valley                 26.3 C               30.5 C
Wong Tai Sin                 25.6 C               28.8 C
Stanley                      25.6 C               29.0 C
Kwun Tong                    25.8 C               28.7 C
Sham Shui Po                 25.8 C               29.6 C
Kai Tak Runway Park          25.8 C               28.9 C
Yuen Long Park               26.0 C               31.0 C

Duration of sunshine (King's Park):              1.3 H
The mean UV index recorded at King's Park yesterday was 2,
the UV intensity was Low.
The maximum UV index for yesterday was 7.
Sea surface temperature (Waglan Island):        26.1 C 

Yesterday's (18 Aug 2016) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.08 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                           0.08
Tap Mun                             0.09
Kat O                               0.09
Yuen Ng Fan                         0.12
Tai Mei Tuk                         0.13
Sha Tau Kok                         0.10
Kwun Tong                           0.12
Sai Wan Ho                          0.10
King's Park                         0.15
Tsim Bei Tsui                       0.13
Cape D'Aguilar                      0.13
Chek Lap Kok                        0.15

Note

      

    1. From readings taken at various locations in Hong Kong during
the period 1987-2015, the background ambient gamma radiation
levels may vary between 0.06 and 0.30 microsievert per hour.

    2. The extent of health effects to a person as a result of
exposure to radiation is expressed by a physical quantity
called equivalent dose, in unit of sievert.  Protective
action may be required if there is an increase in the
ambient gamma dose rate above background such that the total
additional dose is expected to exceed 5000 microsieverts in
a relatively short period of time. For example, a dose of
5000 microsieverts may be reached when the ambient gamma
dose rate is 1000 microsieverts per hour (several thousand
times above background) and lasts for 5 hours.

    3. The readings of ambient gamma radiation level from
instrument are expressed in unit of gray, which is
numerically equal to the gamma dose expressed in sievert.
    Climatological Information for 18 Aug
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