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Bulletin issued at 00:02 HKT 11/Mar/2017

At midnight at the Hong Kong Observatory the air temperature was 18 degrees Celsius and the relative humidity 93 per cent.

The air temperatures at other places were:

King's Park 17 degrees;
Wong Chuk Hang 18 degrees;
Ta Kwu Ling 18 degrees;
Lau Fau Shan 19 degrees;
Tai Po 18 degrees;
Sha Tin 19 degrees;
Tuen Mun 19 degrees;
Tseung Kwan O 17 degrees;
Sai Kung 18 degrees;
Cheung Chau 18 degrees;
Chek Lap Kok 19 degrees;
Tsing Yi 19 degrees;
Shek Kong 19 degrees;
Tsuen Wan Ho Koon 18 degrees;
Tsuen Wan Shing Mun Valley 19 degrees;
Hong Kong Park 18 degrees;
Shau Kei Wan 17 degrees;
Kowloon City 17 degrees;
Happy Valley 18 degrees;
Wong Tai Sin 18 degrees;
Stanley 17 degrees;
Kwun Tong 17 degrees;
Sham Shui Po 19 degrees;
Kai Tak Runway Park 18 degrees;
Yuen Long Park 19 degrees;
Tai Mei Tuk 17 degrees.


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


Climatological Information for 11 Mar

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


Local Weather Forecast
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Bulletin updated at 00:00 HKT 11/Mar/2017

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

The northeast monsoon that had affected the coast of Guangdong was replaced by a humid easterly airstream yesterday. Locally, it was mainly cloudy with mist and one or two rain patches. The visibility in the harbour once fell to around 2000 metres in the evening. Under the influence of a humid easterly airstream, there will be fog over the coast of Guangdong in the next couple of days.

Weather forecast for Hong Kong (Saturday, 11 Mar 2017)

Mainly cloudy. Cool and misty with one or two rain patches in the morning and at night. Temperatures will range between 17 and 20 degrees. Moderate easterly winds, fresh offshore at first.

Outlook : Humid in the following couple of days with coastal fog in the morning and at night. Sunny intervals during the day.


(The above forecast period is valid up to 23:59 HKT today, 11/03/2017; 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 10/Mar/2017

N0 WARNING.

GENERAL SITUATION AT 100900 UTC:
AN EASTERLY AIRSTREAM IS GENERALLY AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 101300 UTC:

HONG KONG= E 4-5, OCNL 6. DOWN TO 500 M IN FOG OR RAIN PATCHES. SEA 2 M. SWELL E UP TO 2 M. TEMP 17-20 C. =
KWANGTUNG= E TO SE 4-5, OCNL 6. DOWN TO 500 M IN FOG OR RAIN PATCHES. SEA 2 M. SWELL E 2 M. =
TAIWAN STRAIT= NE 6-7. RAIN PATCHES. SEA 3-4 M. SWELL NE 2 M. =
BASHI= SE 5-6, NE 5 LATER. CLD. SEA 2-3 M. SWELL E 2 M. =
PRATAS= E TO SE 4-5, NE 5 LATER. RAIN PATCHES. SEA UP TO 2 M. SWELL E 2 M. =
BALINTANG= SE 5-6, NE 5 LATER. RAIN PATCHES. SEA 2-3 M. SWELL E 2 M. =
SCARBOROUGH= E TO SE 4-5, N TO NE 5-6 LATER. FINE. SEA 2-3 M. SWELL E TO NE 2 M. =
PARACEL= E TO SE 4-5. DOWN TO 500 M IN FOG OR RAIN PATCHES IN N. SEA UP TO 2 M. SWELL E 2 M. =
TONKIN= SE 4-5. DOWN TO 500 M IN FOG OR RAIN PATCHES. SEA UP TO 2 M. =
DANANG= SE 4-5. DOWN TO 500 M IN FOG OR RAIN PATCHES. SEA UP TO 2 M. SWELL E 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 23:30 HKT 10/Mar/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 11:30 p.m. on 10 March 2017

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

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

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East force 4 to 5, occasionally force 6.
    A few rain patches with some mist.
    Moderate to rough seas.

    Nan'ao:
    East to northeast force 6 to 7.
    Rough seas.

    Shanwei:
    East force 5 to 6.
    Moderate to rough seas.

    South of Hong Kong:
    East to southeast force 4 to 5, occasionally force 6.
    Fog patches.
    Moderate to rough seas.

    Shangchuan Dao:
    Southeast force 4 to 5.
    Fog patches.
    Moderate seas.

    Outlook for the next 48 hours
    East to southeasterly winds of force 4 to 5, occasionally force 6. Fog patches.

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

    Waglan Island Wind east-northeast force 4
      Visibility 3200 Metres

    Shantou Wind east-northeast force 2
      Visibility 6 Kilometres in rain

    Dongsha Wind northwest force 1
      Visibility 10 Kilometres

    Huangmaozhou Wind northeast force 4

    Macau Wind east force 1
      Visibility 1000 Metres in mist

    Xisha Wind south force 1
      Visibility 23 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 17:30 HKT 10/MAR/2017
    (Next update at 01:30 HKT 11/MAR/2017)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS AND SEV TURB. FOG.
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 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  060/5-10, OCNL 15 LATER
       OFFSHORE:  060/15-20, OCNL 25 LATER             21-17
   B.   2000 FT:  230/10-15, OCNL 20
                  BECMG 120/15, OCNL 20                17
   C.   5000 FT:  260/10-15                            13
   D.  10000 FT:  260/35                               8
   E.  18000 FT:  270/50                               MS6
   F.  24000 FT:  270/55                               MS18
   G.  30000 FT:  270/70                               MS33
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      800 - 1800 FT.
   I. WEATHER       : 
      MAINLY CLOUDY WITH A FEW RAIN PATCHES.
      LOCALIZED FOG.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 800 FT  SCT 2000 FT  BKN 5000 FT
   K. VISIBILITY    : 7 KM. TEMPO 3000 M IN RAIN. TEMPO 400 M IN FOG.
   L. 0 DEG. C LEVEL: 13500 FT      10 DEG. C LEVEL(S) : 8000 FT
   M. TURBULENCE    : MOD TO SEV OFFSHORE. MOD NEAR HILLS.
   N. SEA STATE     : 1.5-3.0 M     SEA TEMPERATURE    : 18 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH EASTERLY WINDS, OCCASIONALLY
     STRONG OFFSHORE. MAINLY CLOUDY WITH A FEW 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 05:12 HKT on 22 Feb 17

    VHHK SIGMET 6 VALID 211715/212115 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2345 E11730 - N2100 E11730 - N2100 E11330 - N2200 E11300 - N2245 E11500 - N2345 E11730 TOP FL400 MOV NE 10KT NC= VHHK SIGMET 7 VALID 212115/220115 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2345 E11730 - N2230 E11730 - N2130 E11430 - N2245 E11430 - N2345 E11730 TOP FL400 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 11/Mar/2017 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     19.2 C
Minimum Air Temperature                     16.4 C
Grass Minimum Temperature                   16.5 C
Relative Humidity                        84 - 93 Percent
Rainfall                                      Trace 
Total rainfall since 1st January            30.5 mm
Against an average of                       98.7 mm

Other Stations                Min                  Max
King's Park                  15.6 C               20.5 C
Wong Chuk Hang               16.7 C               22.9 C
Ta Kwu Ling                  16.1 C               20.9 C
Lau Fau Shan                 16.0 C               22.5 C
Tai Po                       16.0 C               18.4 C
Sha Tin                      16.1 C               20.3 C
Tuen Mun                     17.1 C               21.0 C
Tseung Kwan O                15.2 C               18.3 C
Sai Kung                     15.7 C               18.4 C
Cheung Chau                  16.3 C               21.0 C
Chek Lap Kok                 16.6 C               23.9 C
Tsing Yi                     16.7 C               21.5 C
Shek Kong                    17.1 C               25.6 C
Tsuen Wan Ho Koon            15.9 C               20.6 C
Tsuen Wan Shing Mun Valley   16.6 C               21.8 C
Hong Kong Park               16.2 C               19.5 C
Shau Kei Wan                 15.1 C               18.3 C
Kowloon City                 15.6 C               20.5 C
Happy Valley                 16.5 C               21.8 C
Wong Tai Sin                 16.2 C               20.6 C
Stanley                      15.6 C               20.2 C
Kwun Tong                    15.5 C               20.4 C
Sham Shui Po                 16.5 C               22.1 C
Kai Tak Runway Park          16.0 C               18.9 C
Yuen Long Park               16.7 C               23.2 C
Tai Mei Tuk               15.4 C               18.3 C

Duration of sunshine (King's Park):              0.8 H
The mean UV index recorded at King's Park yesterday was 1,
the UV intensity was Low.
The maximum UV index for yesterday was 5.
Sea surface temperature (Waglan Island):        17.4 C 

Yesterday's (10 Mar 2017) 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 1987-2016, 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 10 Mar
     2003copy right image | Important notices | Privacy policy Last revision date: <11 Mar 2017> 

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