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Bulletin issued at 03:02 HKT 20/Sep/2016

At 3 a.m. at the Hong Kong Observatory the air temperature was 24 degrees Celsius and the relative humidity 95 per cent.

The air temperatures at other places were:

King's Park 23 degrees;
Wong Chuk Hang 24 degrees;
Ta Kwu Ling 23 degrees;
Lau Fau Shan 23 degrees;
Tai Po 23 degrees;
Sha Tin 24 degrees;
Tuen Mun 23 degrees;
Tseung Kwan O 23 degrees;
Sai Kung 24 degrees;
Cheung Chau 23 degrees;
Chek Lap Kok 24 degrees;
Tsing Yi 23 degrees;
Shek Kong 23 degrees;
Tsuen Wan Ho Koon 23 degrees;
Tsuen Wan Shing Mun Valley 23 degrees;
Hong Kong Park 23 degrees;
Shau Kei Wan 23 degrees;
Kowloon City 23 degrees;
Happy Valley 24 degrees;
Wong Tai Sin 23 degrees;
Stanley 23 degrees;
Kwun Tong 23 degrees;
Sham Shui Po 23 degrees;
Kai Tak Runway Park 24 degrees;
Yuen Long Park 23 degrees.

Between 1:45 and 2:45 a.m., the rainfall recorded in various regions were:

Eastern District 5 to 10 mm;
Wan Chai 6 to 7 mm;
Central & Western District 3 to 6 mm;
Southern District 1 to 6 mm;
Yau Tsim Mong 2 to 6 mm;
Islands District 0 to 5 mm;
Sha Tin 0 to 4 mm;
Yuen Long 0 to 4 mm;
Sai Kung 0 to 3 mm;
Tsuen Wan 0 to 3 mm;
Tai Po 0 to 3 mm;
Kwun Tong 1 to 3 mm;
Kowloon City 2 to 3 mm;
North District 0 to 2 mm;
Tuen Mun 1 to 2 mm;
Kwai Tsing 0 to 2 mm;
Wong Tai Sin 1 to 2 mm;
Sham Shui Po 2 mm.


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


Climatological Information for 20 Sep

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


Local Weather Forecast
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Bulletin updated at 02:45 HKT 20/Sep/2016

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

An easterly airstream is affecting the coast of Guangdong gradually.

At 2 a.m., Severe Typhoon Malakas was centred about 80 kilometres east of Kagoshima. It is forecast to move east-northeast at about 32 kilometres per hour across the southern part of Japan.

Weather forecast for today

Mainly cloudy with showers. Showers will ease off gradually with sunny periods during the day. Temperatures will range between 24 and 30 degrees. Moderate east to northeasterly winds, fresh offshore.

Outlook : Mainly cloudy with sunny periods in the following couple of days.


(The above forecast period is valid up to 23:59 HKT today, 20/09/2016; 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 21:00 HKT 19/Sep/2016

N0 WARNING.

GENERAL SITUATION AT 190900 UTC:
AN EASTERLY AIRSTREAM IS GENERALLY AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 191300 UTC:

HONG KONG= E TO NE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. TEMP 26-31 C. =
KWANGTUNG= E TO NE 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. =
TAIWAN STRAIT= NE 6-7. ISOL SHOWERS. SEA 3-4 M. SWELL NE 2 M. =
BASHI= E TO NE 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL NE 2 M. =
PRATAS= E TO NE 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. =
BALINTANG= E TO NE 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL NE 2 M. =
SCARBOROUGH= S TO SE 4-5. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
PARACEL= NE 4-5, OCNL 6. ISOL SHOWERS AND TS. SEA 2 M. =
TONKIN= NE 4-5, OCNL 6 LATER. ISOL SHOWERS AND TS. SEA 2 M. =
DANANG= N TO NE 4-5, OCNL 6 LATER. ISOL SHOWERS AND TS. SEA 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 03:30 HKT 20/Sep/2016

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 3:30 a.m. on 20 September 2016

    Warnings:
    Strong winds in Nan'ao, Shanwei, south of Hong Kong and Shangchuan Dao.

    Weather Situation:
    An easterly airstream is affecting the coastal waters of Guangdong gradually.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East to northeast force 4 to 5.
    Isolated showers and thunderstorms.
    Moderate seas.

    Nan'ao, Shanwei, South of Hong Kong and Shangchuan Dao:
    East to northeast force 5 to 6.
    Isolated showers and thunderstorms.
    Moderate to rough seas.

    Outlook for the next 48 hours
    East to northeasterly winds of force 5 to 6. Isolated showers and thunderstorms.

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

    Waglan Island Wind north force 5
      Visibility 4300 Metres

    Shantou Wind east force 3
      Visibility 30 Kilometres

    Dongsha Wind east-northeast force 4
      Visibility 10 Kilometres

    Huangmaozhou Wind north-northeast force 5

    Macau Wind northeast force 4
      Visibility 12 Kilometres

    Xisha Wind northeast force 1
      Visibility 19 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 01:30 HKT 20/SEP/2016
    (Next update at 9:00-9:30 HKT 20/SEP/2016)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AN EASTERLY AIRSTREAM IS AFFECTING THE COASTAL
     AREAS OF GUANGDONG.
     
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  060/10-15
                  TEMPO VRB/20G30 IN TS
       OFFSHORE:  060/15-20                            26-30
   B.   2000 FT:  060/20                               21
   C.   5000 FT:  050/20                               17
   D.  10000 FT:  060/15                               10
   E.  18000 FT:  330/10                               MS2
   F.  24000 FT:  340/15                               MS14
   G.  30000 FT:  030/20                               MS31
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      2300 - 3000 FT
   I. WEATHER       : 
      MAINLY CLOUDY WITH ISOLATED SHOWERS. A FEW
      ISOLATED THUNDERSTORMS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT SCT 3000 FT TEMPO FEW 800 FT SCT CB
      1200 FT BKN 4000 FT
   K. VISIBILITY    : 10 KM.  TEMPO 4000 M IN SHOWERS. TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 18000 FT      10 DEG. C LEVEL(S) : 10000 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS. MOD NEAR HILLS AND AT LOW LEVELS.
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE EAST TO NORTHEASTERLY WINDS, FRESH
     OFFSHORE. SUNNY PERIODS AND 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 17:40 HKT on 19 Sep 16

    VHHK SIGMET 2 VALID 190940/191340 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1718 E11324 - N1854 E11200 - N2054 E11306 - N2048 E11542 - N1718 E11324 TOP FL420 MOV WSW 15KT WKN=

    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.

    The latest report on Tropical Cyclone Meranti broadcast by Ms LAM CHING CHI , Senior Scientific Officer of the Hong Kong Observatory at 6:15 p.m. on 14 Sep 2016.
    Listen Listen

    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 20/Sep/2016 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     32.6 C
Minimum Air Temperature                     25.5 C
Grass Minimum Temperature                   25.0 C
Relative Humidity                        57 - 90 Percent
Rainfall                                     3.8 mm 
Total rainfall since 1st January          2221.8 mm
Against an average of                     2140.7 mm

Other Stations                Min                  Max
King's Park                  24.2 C               31.8 C
Wong Chuk Hang               25.3 C               32.7 C
Ta Kwu Ling                  23.4 C               33.0 C
Lau Fau Shan                 24.2 C               32.2 C
Tai Po                       24.7 C               30.8 C
Sha Tin                      24.6 C               32.0 C
Tuen Mun                     25.8 C               33.5 C
Tseung Kwan O                24.0 C               33.3 C
Sai Kung                     24.5 C               31.2 C
Cheung Chau                  25.1 C               30.5 C
Chek Lap Kok                 26.6 C               32.8 C
Tsing Yi                     24.8 C               33.0 C
Shek Kong                    24.6 C               33.5 C
Tsuen Wan Ho Koon            24.1 C               31.2 C
Tsuen Wan Shing Mun Valley   23.7 C               33.2 C
Hong Kong Park               24.7 C               32.2 C
Shau Kei Wan                 23.6 C               31.9 C
Kowloon City                 23.9 C               31.5 C
Happy Valley                 24.8 C               34.0 C
Wong Tai Sin                 24.2 C               34.1 C
Stanley                      24.2 C               31.6 C
Kwun Tong                    24.1 C               32.1 C
Sham Shui Po                 24.8 C               33.3 C
Kai Tak Runway Park          24.8 C               31.8 C
Yuen Long Park               25.0 C               33.8 C

Duration of sunshine (King's Park):              7.5 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 8.
 

Yesterday's (19 Sep 2016) 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                               0.09
Yuen Ng Fan                         0.12
Tai Mei Tuk                         0.13
Sha Tau Kok                         0.10
Kwun Tong                           0.12
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 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 19 Sep
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