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Bulletin issued at 13:02 HKT 13/Dec/2016

At 1 p.m. at the Hong Kong Observatory the air temperature was 26 degrees Celsius and the relative humidity 58 per cent.
During the past hour the mean UV Index recorded at King's Park was 5. The intensity of UV radiation was moderate.

The air temperatures at other places were:

King's Park 27 degrees;
Wong Chuk Hang 25 degrees;
Ta Kwu Ling 27 degrees;
Lau Fau Shan 25 degrees;
Tai Po 26 degrees;
Sha Tin 26 degrees;
Tuen Mun 27 degrees;
Tseung Kwan O 27 degrees;
Sai Kung 23 degrees;
Cheung Chau 24 degrees;
Chek Lap Kok 26 degrees;
Tsing Yi 27 degrees;
Shek Kong 27 degrees;
Tsuen Wan Ho Koon 27 degrees;
Tsuen Wan Shing Mun Valley 27 degrees;
Hong Kong Park 27 degrees;
Shau Kei Wan 25 degrees;
Kowloon City 28 degrees;
Happy Valley 25 degrees;
Wong Tai Sin 27 degrees;
Stanley 24 degrees;
Kwun Tong 26 degrees;
Sham Shui Po 28 degrees;
Kai Tak Runway Park 26 degrees;
Yuen Long Park 27 degrees.


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


Climatological Information for 13 Dec

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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

Current Weather | Regional Temperature Forecast in HK |  9-day Weather Forecast
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Bulletin updated at 12:45 HKT 13/Dec/2016

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

Pressure over the northern part of southern China is rising. An intense northeast monsoon is expected to reach the south China coastal areas overnight.

Besides, the tropical depression over the southern part of Vietnam has weakened into an area of low pressure.

Weather forecast for this afternoon and tonight

Mainly fine apart from some haze. Warm during the day. Light to moderate northeasterly winds.

Outlook : Temperatures will fall progressively in the next couple of days. The minimum temperature will be about 13 degrees in the urban areas on Friday, and a couple of degrees lower in the New Territories.


(The above forecast period is valid up to 23:59 HKT today, 13/12/2016; 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 13/Dec/2016

N0 WARNING.

GENERAL SITUATION AT 122100 UTC:
THE NORTHEAST MONSOON IS AFFECTING THE FORECAST AREAS. FOR DETAILS ON TROPICAL DEPRESSION OVER SOUTHERN PART OF THE SOUTH CHINA SEA, PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS.

MARINE FORECAST FOR 24 HOURS FROM 130100 UTC:

HONG KONG= NE 4-5, UP TO 6 LATER. DOWN TO 4000 M IN SOME HAZE. SEA 2 M, UP TO 3 M LATER. TEMP 25-18 C. =
KWANGTUNG= NE 5-6, UP TO 7 LATER. RAIN PATCHES. SEA 2-3 M, UP TO 4 M LATER. SWELL E TO NE 2 M. =
TAIWAN STRAIT= NE 4-5, 6-7 LATER. CLD. SEA UP TO 2 M, 3-4 M LATER. SWELL NE 2 M. =
BASHI= NE 5-6, UP TO 7 LATER. RAIN PATCHES. SEA 2-3 M, UP TO 4 M LATER. SWELL NE 2-3 M. =
PRATAS= NE 5-6, UP TO 7 LATER. RAIN PATCHES. SEA 2-3 M, UP TO 4 M LATER. SWELL NE 2-3 M. =
BALINTANG= NE 5-6, UP TO 7 LATER. RAIN PATCHES. SEA 2-3 M, UP TO 4 M LATER. SWELL NE 2-3 M. =
SCARBOROUGH= NE 5-6, UP TO 7 LATER. ISOL SHOWERS. SEA 2-3 M, UP TO 4 M LATER. SWELL NE 2-3 M. =
PARACEL= NE 5-6, UP TO 7 LATER. ISOL SHOWERS. SEA 2-3 M, UP TO 4 M LATER. SWELL NE 2-3 M. =
TONKIN= NE 5-6, UP TO 7 LATER. RAIN PATCHES. SEA 2-3 M, UP TO 4 M LATER. =
DANANG= NE 5-6, UP TO 7 LATER. ISOL SHOWERS AND TS. SEA 2-3 M, UP TO 4 M LATER. SWELL NE 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 12:30 HKT 13/Dec/2016

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 12:30 p.m. on 13 December 2016

    Warnings:
    Strong winds in all areas.

    Weather Situation:
    The northeast monsoon is affecting the south China coastal waters.

    Besides, the tropical depression over the southern part of Vietnam has weakened into an area of low pressure.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    Northeast force 4 to 5, up to force 6 later.
    Some haze.
    Moderate seas, becoming rough later.

    Nan'ao, Shanwei, South of Hong Kong and Shangchuan Dao:
    Northeast force 5 to 6, up to force 7 later.
    Moderate to rough seas.

    Outlook for the next 48 hours
    Northeasterly winds of force 7 to 8.

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

    Waglan Island Wind northeast force 3
      Visibility 10 Kilometres

    Shantou Wind west-southwest force 1
      Visibility 6 Kilometres in haze

    Dongsha Wind east-northeast force 4
      Visibility 10 Kilometres

    Huangmaozhou Wind east-northeast force 4

    Macau Wind north-northeast force 3
      Visibility 6 Kilometres

    Xisha Wind east-northeast force 2
      Visibility 6 Kilometres in showers

  • 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 13/DEC/2016
    (Next update at 17:30 HKT 13/DEC/2016)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     PRESSURE OVER THE NORTHERN PART OF SOUTHERN
     CHINA IS RISING. AN INTENSE NORTHEAST MONSOON IS
     EXPECTED TO REACH THE SOUTH CHINA COASTAL AREAS
     OVERNIGHT.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  080/5-10
       OFFSHORE:  080/10-15                            23-27
   B.   2000 FT:  100/10-15 OCNL 20                    18
   C.   5000 FT:  040/10                               14
   D.  10000 FT:  300/15                               6
   E.  18000 FT:  270/35                               MS4
   F.  24000 FT:  270/40                               MS16
   G.  30000 FT:  300/45                               MS31
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      1000-1800 FT.
   I. WEATHER       : 
      MAINLY FINE WITH SOME HAZE.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 3000 FT.
   K. VISIBILITY    : 8 KM. TEMPO 4000 M IN HAZE.
   L. 0 DEG. C LEVEL: 16500 FT      10 DEG. C LEVEL(S) : 5400 FT
   M. TURBULENCE    : MOD TO SEV OFFSHORE AND NEAR HILLS
   N. SEA STATE     : 1.0-1.5 M     SEA TEMPERATURE    : 21 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH NORTH TO NORTHEASTERLIES,
     OCCASIONALLY STRONG OFFSHORE. MAINLY CLOUDY WITH
     A FEW LIGHT RAIN PATCHES. LOCALIZED MIST.=

    ===================================================================
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 13:10 HKT on 26 Nov 16

    VHHK SIGMET 1 VALID 260110/260510 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1854 E11200 - N1930 E11130 - N2012 E11130 - N2036 E11230 - N1912 E11230 - N1854 E11200 TOP FL420 MOV S 10KT NC= VHHK SIGMET 2 VALID 260510/260910 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1754 E11254 - N1924 E11136 - N2000 E11236 - N1754 E11254 TOP FL420 MOV SSE 15KT 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 13/Dec/2016


    Tropical Cyclone Warning

    At 130000 UTC, the tropical depression over Vietnam with central pressure 1004 hectopascals was centred within 90 nautical miles of one zero point nine degrees north (10.9 N) one zero seven point nine degrees east (107.9 E) and is forecast to move west-southwest slowly 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 over northeast quadrant, 90 nautical miles elsewhere.

    No further warnings on this Tropical Depression will be issued by the Hong Kong Observatory unless it re-enters the Hong Kong area of responsibility.

    Forecast position and intensity at 140000 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 13/Dec/2016 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     23.3 C
Minimum Air Temperature                     19.0 C
Grass Minimum Temperature                   19.5 C
Relative Humidity                        67 - 84 Percent
Rainfall                                      Trace 
Total rainfall since 1st January          3020.2 mm
Against an average of                     2379.8 mm

Other Stations                Min                  Max
King's Park                  18.2 C               25.0 C
Wong Chuk Hang               18.8 C               25.2 C
Ta Kwu Ling                  17.3 C               25.6 C
Lau Fau Shan                 17.1 C               27.2 C
Tai Po                       18.7 C               24.0 C
Sha Tin                      18.8 C               25.1 C
Tuen Mun                     18.2 C               25.8 C
Tseung Kwan O                17.9 C               25.6 C
Sai Kung                     18.8 C               23.5 C
Cheung Chau                  19.0 C               23.3 C
Chek Lap Kok                 19.5 C               27.1 C
Tsing Yi                     18.7 C               26.5 C
Shek Kong                    18.4 C               26.2 C
Tsuen Wan Ho Koon            17.2 C               25.7 C
Tsuen Wan Shing Mun Valley   18.7 C               26.2 C
Hong Kong Park               18.6 C               25.0 C
Shau Kei Wan                 18.3 C               23.1 C
Kowloon City                 18.6 C               26.0 C
Happy Valley                 19.2 C               25.2 C
Wong Tai Sin                 19.0 C               26.8 C
Stanley                      19.2 C               23.6 C
Kwun Tong                    18.3 C               24.0 C
Sham Shui Po                 18.8 C               27.0 C
Kai Tak Runway Park          19.2 C               24.2 C
Yuen Long Park               17.0 C               27.6 C

Duration of sunshine (King's Park):              7.2 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.
Sea surface temperature (Waglan Island):        22.5 C 

Yesterday's (12 Dec 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                               0.10
Yuen Ng Fan                         0.12
Tai Mei Tuk                         0.12
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                        0.15

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 12 Dec
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