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Bulletin issued at 05:02 HKT 29/Nov/2017

At 5 a.m. at the Hong Kong Observatory the air temperature was 22 degrees Celsius and the relative humidity 90 per cent.

The air temperatures at other places were:

King's Park 21 degrees;
Wong Chuk Hang 22 degrees;
Ta Kwu Ling 21 degrees;
Lau Fau Shan 21 degrees;
Tai Po 21 degrees;
Sha Tin 22 degrees;
Tuen Mun 21 degrees;
Tseung Kwan O 21 degrees;
Sai Kung 21 degrees;
Cheung Chau 21 degrees;
Chek Lap Kok 22 degrees;
Tsing Yi 22 degrees;
Shek Kong 21 degrees;
Tsuen Wan Ho Koon 20 degrees;
Tsuen Wan Shing Mun Valley 21 degrees;
Hong Kong Park 22 degrees;
Shau Kei Wan 21 degrees;
Kowloon City 21 degrees;
Happy Valley 22 degrees;
Wong Tai Sin 21 degrees;
Stanley 21 degrees;
Kwun Tong 21 degrees;
Sham Shui Po 22 degrees;
Kai Tak Runway Park 22 degrees;
Yuen Long Park 21 degrees;
Tai Mei Tuk 21 degrees.


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


Climatological Information for 29 Nov

Regional Weather in Hong Kong

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Hong Kong Climatology


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Bulletin updated at 04:45 HKT 29/Nov/2017

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

An easterly airstream is affecting the coastal areas of Guangdong.

Weather forecast for today

Mainly cloudy. Visibility relatively low in some areas. A few light rain patches in the morning and at night. Sunny intervals during the day with a maximum temperature of around 25 degrees. Moderate east to northeasterly winds.

Outlook : Warm during the day tomorrow, while temperatures will fall at night. Cooler in the morning in the following couple of days.


(The above forecast period is valid up to 23:59 HKT today, 29/11/2017; Regular update at : around 45 minutes past each hour, 16:15 HKT and 23:15 HKT)

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MARINE FORECAST
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Marine Forecast

Weather Information for the Marine Community

Bulletin issued at 21:00 HKT 28/Nov/2017

N0 WARNING.

GENERAL SITUATION AT 280900 UTC:
AN EASTERLY AIRSTREAM IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 281300 UTC:

HONG KONG= E TO NE 5-6. LGT RAIN PATCHES LATER. SEA 2-3 M. SWELL NE 2 M. TEMP 22-25 C. =
KWANGTUNG= E TO NE 6-7. LGT RAIN PATCHES. SEA 4-6 M. SWELL NE 2-3 M. =
TAIWAN STRAIT= NE 6-7. FINE. SEA 3-4 M. SWELL NE 2-3 M. =
BASHI= E TO NE 6-7. FINE. SEA 3-4 M. SWELL NE 2-3 M. =
PRATAS= E TO NE 6-7. LGT RAIN PATCHES. SEA 3-4 M. SWELL NE 2-3 M. =
BALINTANG= E TO NE 6-7. FINE. SEA 3-4 M. SWELL NE 2-3 M. =
SCARBOROUGH= E TO NE 5-6. LGT RAIN PATCHES. SEA 2-3 M. SWELL NE 2-3 M. =
PARACEL= E TO NE 5-6. LGT RAIN PATCHES. SEA 2-3 M. SWELL NE 2-3 M. =
TONKIN= NE 5-6. RAIN PATCHES. SEA 2-3 M. SWELL NE 2 M. =
DANANG= E TO NE 5-6. RAIN PATCHES. SEA 2-3 M. 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 05:30 HKT 29/Nov/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 5:30 a.m. on 29 November 2017

    Warnings:
    Strong winds in all areas.

    Weather Situation:
    An easterly airstream is affecting the south China coastal waters.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East to northeast force 5 to 6.
    A few light rain patches. Visibility relatively low in some areas.
    Moderate to rough seas.

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

    South of Hong Kong and Shangchuan Dao:
    Northeast force 5 to 6.
    Moderate to rough seas.

    Outlook for the next 48 hours
    Northeasterly winds of force 6 to 7, becoming north to northeasterly winds up to force 8.

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

    Waglan Island Wind east-northeast force 5
      Visibility 9 Kilometres

    Shantou Wind calm
      Visibility 7 Kilometres in mist

    Dongsha Wind east-northeast force 3
      Visibility 10 Kilometres

    Huangmaozhou Wind east force 5

    Macau Wind north force 2
      Visibility 4900 Metres in mist

    Xisha Wind east-northeast force 1
      Visibility 14 Kilometres

  • Explanation of Seas or Sea Waves
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  • Visibility Readings in Hong Kong Waters
  • Map showing forecast areas
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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 01:30 HKT 29/NOV/2017
    (Next update at 9:00-9:30 HKT 29/NOV/2017)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AN EASTERLY AIRSTREAM IS AFFECTING THE SOUTH
     CHINA COASTAL AREAS.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  050/10
       OFFSHORE:  070/15                               20-25
   B.   2000 FT:  080/15-20                            20
   C.   5000 FT:  120/25                               17
   D.  10000 FT:  160/15                               11
   E.  18000 FT:  230/30                               MS7
   F.  24000 FT:  230/40                               MS16
   G.  30000 FT:  240/35                               MS29
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      1800-2800FT,3400-3800FT
   I. WEATHER       : 
      MAINLY CLOUDY. SUNNY INTERVALS DURING THE DAY.
      A FEW RAIN AND MIST PATCHES.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 3500 FT  SCT 4500 FT BKN 6000 FT
   K. VISIBILITY    : 7 KM. TEMPO 3000 M IN RAIN OR MIST.
   L. 0 DEG. C LEVEL: 15500 FT      10 DEG. C LEVEL(S) : 10600 FT
   M. TURBULENCE    : MOD OFFSHORE AND NEAR HILLS
   N. SEA STATE     : 1.0-1.5 M     SEA TEMPERATURE    : 23 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE EAST TO NORTHEASTERLY WINDS. SUNNY
     INTERVALS DURING THE DAY. MAINLY CLOUDY AT
     NIGHT. A FEW LIGHT RAIN AND MIST PATCHES.=

    ===================================================================
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 10:00 HKT on 15 Nov 17

    VHHK SIGMET Z99 VALID 150200/150210 VHHH- VHHK HONG KONG FIR THIS IS A TEST SIGMET, PLEASE DISREGARD=

    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 29/Nov/2017 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     24.6 C
Minimum Air Temperature                     20.6 C
Grass Minimum Temperature                   18.8 C
Relative Humidity                        70 - 88 Percent
Rainfall                                      Trace 
Total rainfall since 1st January          2571.8 mm
Against an average of                     2370.9 mm

Other Stations                Min                  Max
King's Park                  20.2 C               25.4 C
Wong Chuk Hang               21.0 C               26.1 C
Ta Kwu Ling                  17.2 C               27.0 C
Lau Fau Shan                 18.8 C               25.6 C
Tai Po                       19.6 C               25.6 C
Sha Tin                      20.2 C               26.2 C
Tuen Mun                     18.9 C               26.4 C
Tseung Kwan O                19.9 C               26.7 C
Sai Kung                     19.7 C               24.9 C
Cheung Chau                  20.2 C               24.9 C
Chek Lap Kok                 20.7 C               25.6 C
Tsing Yi                     20.9 C               26.3 C
Shek Kong                    19.7 C               27.8 C
Tsuen Wan Ho Koon            18.3 C               25.5 C
Tsuen Wan Shing Mun Valley   20.2 C               28.1 C
Hong Kong Park               20.6 C               25.3 C
Shau Kei Wan                 20.2 C               25.2 C
Kowloon City                 20.0 C               28.1 C
Happy Valley                 20.8 C               26.1 C
Wong Tai Sin                 20.3 C               27.3 C
Stanley                      20.7 C               24.6 C
Kwun Tong                    20.1 C               26.1 C
Sham Shui Po                 20.3 C               26.6 C
Kai Tak Runway Park          21.1 C               25.7 C
Yuen Long Park               19.2 C               28.2 C
Tai Mei Tuk               19.5 C               26.0 C

Duration of sunshine (King's Park):              2.4 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):        22.2 C 

Yesterday's (28 Nov 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                         0.15
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 1987-2016, 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 28 Nov
     2003copy right image | Important notices | Privacy policy Last revision date: <29 Nov 2017> 

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