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Bulletin issued at 06:02 HKT 17/Nov/2017

At 6 a.m. at the Hong Kong Observatory the air temperature was 23 degrees Celsius and the relative humidity 87 per cent.

The air temperatures at other places were:

King's Park 23 degrees;
Wong Chuk Hang 23 degrees;
Ta Kwu Ling 22 degrees;
Lau Fau Shan 21 degrees;
Tai Po 22 degrees;
Sha Tin 23 degrees;
Tuen Mun 22 degrees;
Tseung Kwan O 22 degrees;
Sai Kung 23 degrees;
Cheung Chau 22 degrees;
Chek Lap Kok 23 degrees;
Tsing Yi 23 degrees;
Shek Kong 22 degrees;
Tsuen Wan Ho Koon 21 degrees;
Tsuen Wan Shing Mun Valley 22 degrees;
Hong Kong Park 23 degrees;
Shau Kei Wan 22 degrees;
Kowloon City 22 degrees;
Happy Valley 23 degrees;
Wong Tai Sin 22 degrees;
Stanley 23 degrees;
Kwun Tong 22 degrees;
Sham Shui Po 23 degrees;
Kai Tak Runway Park 23 degrees;
Yuen Long Park 21 degrees;
Tai Mei Tuk 22 degrees.


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


Climatological Information for 17 Nov

Regional Weather in Hong Kong

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Hong Kong Climatology


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Bulletin updated at 05:45 HKT 17/Nov/2017

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

The anticyclone aloft is affecting the south China coast. Meanwhile, the area of low pressure near the Philippines is bringing unsettled weather to the region.

Weather forecast for today

Cloudy periods in the morning and at night. Mainly fine during the day with a maximum temperature of around 27 degrees. Moderate easterly winds.

Outlook : Windy with a few rain patches and temperatures falling appreciably later tomorrow and on Sunday. Cool early next week.


(The above forecast period is valid up to 23:59 HKT today, 17/11/2017; 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 16/Nov/2017

N0 WARNING.

GENERAL SITUATION AT 160900 UTC:
AN EASTERLY AIRSTREAM IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 161300 UTC:

HONG KONG= E 4-5. FINE. SEA UP TO 2 M. SWELL NE UP TO 2 M. TEMP 22-27 C. =
KWANGTUNG= E TO NE 5. FINE. SEA 2 M. SWELL NE 2 M. =
TAIWAN STRAIT= NE 5. FINE. SEA 2 M. SWELL NE 2 M. =
BASHI= E 5. FINE. SEA 2 M. SWELL NE 2 M. =
PRATAS= E TO NE 5. FINE. SEA 2 M. SWELL NE 2 M. =
BALINTANG= E 5. ISOL SHOWERS. SEA 2 M. SWELL NE 2 M. =
SCARBOROUGH= E TO NE 5. ISOL SHOWERS AND TS. SEA 2 M. SWELL NE 2 M. =
PARACEL= E TO NE 5. FINE. SEA 2 M. SWELL NE 2 M. =
TONKIN= SE 5. FINE. SEA 2 M. SWELL E UP TO 2 M. =
DANANG= E TO SE 5. FINE. SEA 2 M. SWELL NE 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

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    Bulletin issued at 05:30 HKT 17/Nov/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 5:30 a.m. on 17 November 2017

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

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East force 4 to 5.
    Moderate seas.

    Nan'ao and Shanwei:
    East to northeast force 5.
    Moderate seas.

    South of Hong Kong and Shangchuan Dao:
    East force 5.
    Moderate seas.

    Outlook for the next 48 hours
    Easterly winds of force 4 to 5, becoming northerly winds of up to force 8.

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

    Waglan Island Wind north-northeast force 3
      Visibility 10 Kilometres

    Shantou Wind northeast force 1
      Visibility 12 Kilometres

    Dongsha Wind northeast force 3
      Visibility 10 Kilometres

    Huangmaozhou Wind east-northeast force 3

    Macau Wind east force 1
      Visibility 6 Kilometres

    Xisha Wind east-northeast force 1
      Visibility 20 Kilometres

  • Explanation of Seas or Sea Waves
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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 01:30 HKT 17/NOV/2017
    (Next update at 9:00-9:30 HKT 17/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:  080/5-10
       OFFSHORE:  080/10-15                            22-27
   B.   2000 FT:  120/10-15                            18
   C.   5000 FT:  200/10                               15
   D.  10000 FT:  260/15                               11
   E.  18000 FT:  280/20                               MS5
   F.  24000 FT:  320/25                               MS15
   G.  30000 FT:  320/35                               MS29
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      2600-2900 FT.
   I. WEATHER       : 
      CLOUDY PERIODS OVERNIGHT. MAINLY FINE DURING THE DAY
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT
   K. VISIBILITY    : 9 KM.
   L. 0 DEG. C LEVEL: 16500 FT      10 DEG. C LEVEL(S) : 10200 FT
   M. TURBULENCE    : MOD OFFSHORE AND  NEAR HILLS.
   N. SEA STATE     : 1.0-1.5 M     SEA TEMPERATURE    : 24 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE EASTERLY WINDS. MAINLY FINE=

    ===================================================================
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 17/Nov/2017 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     26.2 C
Minimum Air Temperature                     22.2 C
Grass Minimum Temperature                   21.2 C
Relative Humidity                        70 - 87 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          2568.9 mm
Against an average of                     2358.1 mm

Other Stations                Min                  Max
King's Park                  21.8 C               26.3 C
Wong Chuk Hang               22.6 C               26.7 C
Ta Kwu Ling                  21.8 C               26.8 C
Lau Fau Shan                 20.4 C               28.4 C
Tai Po                       22.5 C               24.8 C
Sha Tin                      22.6 C               26.4 C
Tuen Mun                     21.7 C               27.6 C
Tseung Kwan O                21.8 C               25.7 C
Sai Kung                     22.7 C               25.0 C
Cheung Chau                  21.8 C               26.0 C
Chek Lap Kok                 23.0 C               28.9 C
Tsing Yi                     22.8 C               27.7 C
Shek Kong                    20.9 C               27.9 C
Tsuen Wan Ho Koon            20.7 C               26.6 C
Tsuen Wan Shing Mun Valley   22.2 C               27.6 C
Hong Kong Park               22.2 C               26.4 C
Shau Kei Wan                 22.0 C               25.2 C
Kowloon City                 21.9 C               27.1 C
Happy Valley                 22.3 C               27.0 C
Wong Tai Sin                 21.9 C               26.4 C
Stanley                      22.1 C               25.2 C
Kwun Tong                    21.8 C               25.1 C
Sham Shui Po                 22.6 C               27.9 C
Kai Tak Runway Park          22.8 C               25.4 C
Yuen Long Park               20.4 C               28.6 C
Tai Mei Tuk               21.9 C               26.2 C

Duration of sunshine (King's Park):              7.9 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 6.
Sea surface temperature (Waglan Island):        23.7 C 

Yesterday's (16 Nov 2017) 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                         0.12
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                        0.14

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 16 Nov
     2003copy right image | Important notices | Privacy policy Last revision date: <17 Nov 2017> 

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