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Bulletin issued at 19:02 HKT 05/Oct/2016

At 7 p.m. at the Hong Kong Observatory the air temperature was 29 degrees Celsius and the relative humidity 77 per cent.

The area of low pressure over the Luzon Strait has intensified into a tropical depression this afternoon. It will enter the South China Sea tomorrow (6 October 2016) and will move across the northern part of the South China Sea in the following couple of days. Besides, the northeast monsoon will reach southern China over the weekend. As the circulation of the tropical cyclone is rather small and compact, it will only bring significant impact to local weather when it gets relatively close to Hong Kong. The movement of the tropical cyclone and its intensity change after entering the South China Sea remain uncertain for the time being, and its interaction with the northeast monsoon is also a determining factor. The Hong Kong Observatory will continue to monitor closely the evolution of the tropical cyclone.

The air temperatures at other places were:

King's Park 28 degrees;
Wong Chuk Hang 29 degrees;
Ta Kwu Ling 28 degrees;
Lau Fau Shan 27 degrees;
Tai Po 28 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 29 degrees;
Shek Kong 29 degrees;
Tsuen Wan Ho Koon 27 degrees;
Tsuen Wan Shing Mun Valley 28 degrees;
Hong Kong Park 28 degrees;
Shau Kei Wan 28 degrees;
Kowloon City 28 degrees;
Happy Valley 29 degrees;
Wong Tai Sin 28 degrees;
Stanley 28 degrees;
Kwun Tong 28 degrees;
Sham Shui Po 28 degrees;
Kai Tak Runway Park 29 degrees;
Yuen Long Park 29 degrees.

Here is the information on Tropical Depression at 7 p.m.:
Location: 19.7 degrees north, 124.0 degrees east.


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


Climatological Information for 5 Oct

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


Local Weather Forecast
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Bulletin updated at 18:45 HKT 05/Oct/2016

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

Showers are affecting the coast of Guangdong.

The area of low pressure over the Luzon Strait has intensified into a tropical depression. At 6 p.m., the tropical depression was centred about 800 kilometres east of Dongsha. It is forecast to move west at about 25 kilometres per hour across the Luzon Strait.

Weather forecast for tonight and tomorrow

Mainly cloudy with a few showers. Isolated thunderstorms at first. The minimum temperature will be about 27 degrees tomorrow morning. Hot with sunny periods during the day. The maximum temperature will be about 32 degrees in the urban areas, and one or two degrees higher over the New Territories. Moderate northeasterly winds.

Outlook : Sunny intervals on Friday. Windier with a few rain patches over the weekend and early next week.


(The above forecast period is valid up to 23:59 HKT tomorrow, 06/10/2016; 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 09:00 HKT 05/Oct/2016

GALE WARNING AREAS: TAIWAN STRAIT, BASHI AND BALINTANG.

GENERAL SITUATION AT 042100 UTC:
LOW 1006 HPA 20N 112E SW SLOWLY INTST NC. LOW 1006 HPA 18N 128E WNW 15 KT INTSF.

MARINE FORECAST FOR 24 HOURS FROM 050100 UTC:

HONG KONG= NE 4-5, BEC 6. ISOL SHOWERS AND TS. SEA 2 M, BEC 3 M. TEMP 30-27 C. =
KWANGTUNG= E TO NE 4-5, BEC 6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2 M, BEC 3 M. =
TAIWAN STRAIT= NE 6-7, OCNL 8. ISOL SHOWERS AND TS. SEA UP TO 6 M. SWELL NE 2 M. =
BASHI= NE 6-7, UP TO 8 LATER. DOWN TO 1000 M IN OCNL SQUALLY SHOWERS AND TS. SEA UP TO 6 M LATER. SWELL NE 2-3 M. =
PRATAS= NE 4-5, BEC 6. ISOL SHOWERS AND TS. SEA 2 M, BEC 3 M. =
BALINTANG= NE 6-7, UP TO 8 LATER. DOWN TO 1000 M IN OCNL SQUALLY SHOWERS AND TS. SEA UP TO 6 M LATER. SWELL NE 2-3 M. =
SCARBOROUGH= E TO NE 4-5, BEC 6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2 M, BEC 3 M. =
PARACEL= E TO NE 4-5, BEC 6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2 M, BEC 3 M. =
TONKIN= E TO NE 4-5, BEC 6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2 M, BEC 3 M. =
DANANG= NE 4-5. DOWN TO 4000 M IN ISOL SQUALLY 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
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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
    9-day Weather Forecast | UV Index Forecast | Weather Information for Fishermen

    Bulletin issued at 19:30 HKT 05/Oct/2016

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 7:30 p.m. on 05 October 2016

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

    Weather Situation:
    Unsettled weather is affecting the coastal waters of Guangdong.

    At 7 p.m., the tropical depression over Luzon Strait with maximum sustained winds of about 45 kilometres per hour near its centre was located at 19.7 degrees north, 124.0 degrees east, it is forecast to move west at about 25 kilometres per hour across the Luzon Strait.

    Area forecasts for the next 24 hours

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

    Nan'ao:
    Northeast force 5 to 6, force 7 later.
    Isolated showers and thunderstorms.
    Moderate to rough seas.

    Shanwei and South of Hong Kong:
    Northeast force 5, occasionally force 6.
    Isolated showers and thunderstorms.
    Moderate to rough seas.

    Shangchuan Dao:
    Northeast force 4 to 5.
    Isolated showers and thunderstorms.
    Moderate seas.

    Outlook for the next 48 hours
    Northeasterly winds of force 5 to 6, force 7 in east. Scattered squally showers and thunderstorms.

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

    Waglan Island Wind east-northeast force 5
      Visibility 14 Kilometres

    Shantou Wind east force 2
      Visibility 30 Kilometres

    Dongsha Wind northeast force 3
      Visibility 10 Kilometres

    Huangmaozhou Wind east-northeast force 5

    Macau Wind east force 2
      Visibility 7 Kilometres

    Xisha Wind northeast force 2
      Visibility 26 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
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    • WEATHER FORECAST FOR LOCAL AVIATION
    Traditional Chinese Simplified Chinese

    Weather Forecast for Local Aviation

    Bulletin issued at 19:30 HKT 05/OCT/2016
    (Next update at 01:30 HKT 06/OCT/2016)
    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.
     THE AREA OF LOW PRESSURE OVER THE LUZON STRAIT
     HAS INTENSIFIED INTO A TROPICAL DEPRESSION. 
     AT 7 P.M., THE TROPICAL DEPRESSION WAS CENTRED
     AT 19.7 DEGREES NORTH, 124.0 DEGREES EAST, IT IS
     FORECAST TO MOVE WEST AT ABOUT 14 KNOTS ACROSS
     THE LUZON STRAIT.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  060/5-10
                  TEMPO VRB/15G25 IN TS
       OFFSHORE:  070/15-20                            28-27
   B.   2000 FT:  070/15-20                            22
   C.   5000 FT:  070/15                               18
   D.  10000 FT:  080/15                               12
   E.  18000 FT:  110/10                               MS2
   F.  24000 FT:  140/10                               MS12
   G.  30000 FT:  100/10                               MS27
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      MAINLY CLOUDY WITH A FEW SHOWERS. ISOLATED
      THUNDERSTORMS AT FIRST.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT SCT 3500 FT. 
      TEMPO FEW CB 1000 FT  SCT 2500 FT.
   K. VISIBILITY    : 8 KM. TEMPO 4000 M IN SHOWERS. 
                      TEMPO 2000 M IN THUNDERSTORMS.
   L. 0 DEG. C LEVEL: 17000 FT      10 DEG. C LEVEL(S) : 10800 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS, OFFSHORE AND NEAR HILLS
   N. SEA STATE     : 1.5-2.0 M     SEA TEMPERATURE    : 29 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE NORTHEASTERLY WINDS. 
     SUNNY PERIODS AND 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
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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 16:10 HKT on 05 Oct 16

    VHHK SIGMET 4 VALID 050820/051220 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1730 E11442 - N1642 E11400 - N1930 E11130 - N1930 E11130 - N2000 E11330 - N1824 E11518 - N1730 E11442 TOP FL400 MOV W 05KT 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.

    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

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    Bulletin issued at 18:30 HKT 05/Oct/2016


    Tropical Cyclone Warning

    Tropical depression over the Luzon Strait has entered the area of responsibility of the Hong Kong Observatory.

    An area of low pressure over the Luzon Strait has intensified into a Tropical Depression with central pressure 1000 hectopascals. At 050900 UTC, it was centred within 90 nautical miles of one nine point six degrees north (19.6 N) one two four point six degrees east (124.6 E) and is forecast to move west at about 14 knots for the next 24 hours.

    Maximum winds near the centre are estimated to be 25 knots.

    Radius of over 2 metre waves 120 nautical miles.

    Forecast position and intensity at 060900 UTC
    Two zero point five degrees north (20.5 N)
    One one eight point seven degrees east (118.7 E)
    Maximum winds 35 knots.

    Forecast position and intensity at 070900 UTC
    Two zero point five degrees north (20.5 N)
    One one six point two degrees east (116.2 E)
    Maximum winds 50 knots.

    Forecast position and intensity at 080900 UTC
    Two zero point five degrees north (20.5 N)
    One one five point four degrees east (115.4 E)
    Maximum winds 60 knots.

    Forecast position and intensity at 090900 UTC
    Two zero point two degrees north (20.2 N)
    One one four point five degrees east (114.5 E)
    Maximum winds 55 knots.

    Forecast position and intensity at 100900 UTC
    One nine point zero degrees north (19.0 N)
    One one two point two degrees east (112.2 E)
    Maximum winds 55 knots.



    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 05/Oct/2016 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     29.5 C
Minimum Air Temperature                     26.5 C
Grass Minimum Temperature                   25.8 C
Relative Humidity                        74 - 87 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          2360.2 mm
Against an average of                     2248.4 mm

Other Stations                Min                  Max
King's Park                  25.8 C               29.4 C
Ta Kwu Ling                  23.7 C               32.8 C
Lau Fau Shan                 24.5 C               32.8 C
Tai Po                       25.3 C               29.9 C
Sha Tin                      25.9 C               30.4 C
Tuen Mun                     25.6 C               30.5 C
Tseung Kwan O                25.1 C               30.6 C
Sai Kung                     26.0 C               29.5 C
Cheung Chau                  26.0 C               28.2 C
Chek Lap Kok                 27.0 C               32.5 C
Tsing Yi                     25.9 C               31.4 C
Shek Kong                    25.7 C               32.5 C
Tsuen Wan Ho Koon            24.0 C               30.3 C
Tsuen Wan Shing Mun Valley   25.7 C               30.9 C
Hong Kong Park               26.0 C               28.6 C
Shau Kei Wan                 25.6 C               28.6 C
Kowloon City                 25.9 C               31.0 C
Happy Valley                 26.5 C               30.4 C
Wong Tai Sin                 26.1 C               30.7 C
Stanley                      24.9 C               28.4 C
Kwun Tong                    26.0 C               30.0 C
Sham Shui Po                 26.0 C               30.5 C
Kai Tak Runway Park          26.7 C               29.3 C
Yuen Long Park               25.5 C               31.5 C

Duration of sunshine (King's Park):              4.9 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 5.
 

Yesterday's (04 Oct 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                             0.08
Kat O                               0.09
Yuen Ng Fan                         0.11
Tai Mei Tuk                         0.13
Sha Tau Kok                         0.10
Kwun Tong                           0.11
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 04 Oct
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