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Bulletin issued at 23:02 HKT 29/Nov/2017

At 11 p.m. at the Hong Kong Observatory the air temperature was 23 degrees Celsius and the relative humidity 88 per cent.

The air temperatures at other places were:

King's Park 23 degrees;
Wong Chuk Hang 23 degrees;
Ta Kwu Ling 21 degrees;
Lau Fau Shan 22 degrees;
Tai Po 22 degrees;
Sha Tin 22 degrees;
Tuen Mun 22 degrees;
Tseung Kwan O 22 degrees;
Sai Kung 22 degrees;
Cheung Chau 23 degrees;
Chek Lap Kok 25 degrees;
Tsing Yi 23 degrees;
Shek Kong 22 degrees;
Tsuen Wan Ho Koon 21 degrees;
Tsuen Wan Shing Mun Valley 21 degrees;
Hong Kong Park 23 degrees;
Shau Kei Wan 22 degrees;
Kowloon City 23 degrees;
Happy Valley 23 degrees;
Wong Tai Sin 23 degrees;
Stanley 22 degrees;
Kwun Tong 23 degrees;
Sham Shui Po 23 degrees;
Kai Tak Runway Park 23 degrees;
Yuen Long Park 22 degrees;
Tai Mei Tuk 22 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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Bulletin updated at 23:15 HKT 29/Nov/2017

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

An easterly airstream affected the coastal areas of Guangdong today. Locally, there were sunny periods apart from relatively low visibility in some areas. The weather was warm in the afternoon. Temperatures over the territory generally rose to 26 degrees or above. The northeast monsoon is expected to reach the south China coast later tomorrow, it will be cooler over the region in the following couple of days.

Weather forecast for Hong Kong (Thursday, 30 Nov 2017)

Mainly cloudy. Visibility relatively low with one or two light rain patches at first. Sunny periods during the day. Temperatures will range between 21 and 26 degrees. Moderate easterly winds, becoming moderate to fresh northeasterlies later.

Outlook : Cooler morning in the following couple of days. Mainly fine early next week.


(The above forecast period is valid up to 23:59 HKT tomorrow, 30/11/2017; 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 29/Nov/2017

GALE WARNING AREAS: KWANGTUNG, TAIWAN STRAIT, BASHI, PRATAS, BALINTANG AND PARACEL.

GENERAL SITUATION AT 290900 UTC:
AN EASTERLY AIRSTREAM IS AFFECTING THE FORECAST AREAS. AN INTENSE NORTHEAST MONSOON IS EXPECTED TO AFFECT THE FORECAST AREAS LATER.

MARINE FORECAST FOR 24 HOURS FROM 291300 UTC:

HONG KONG= E 5-6, N 7 LATER. DOWN TO 4000 M IN MIST OR LGT RAIN PATCHES. SEA 2-3 M, 4 M LATER. SWELL NE 2 M. TEMP 21-26 C. =
KWANGTUNG= E 6-7, N 8 LATER. DOWN TO 4000 M IN MIST OR LGT RAIN PATCHES. SEA 3-4 M, 6 M LATER. SWELL NE 2 M. =
TAIWAN STRAIT= NE 6-7, BEC 8-9. DOWN TO 4000 M IN MIST OR LGT RAIN PATCHES. SEA 3-4 M, BEC 6-8 M. SWELL NE 2 M. =
BASHI= E 6-7, N 8 LATER. FINE. RAIN PATCHES LATER. SEA 3-4 M, 6 M LATER. SWELL NE 2-3 M. =
PRATAS= E 6-7, N 8 LATER. LGT RAIN PATCHES. SEA 3-4 M, 6 M LATER. SWELL NE 2 M. =
BALINTANG= E TO NE 6-7, UP TO 8 LATER. FINE. RAIN PATCHES LATER. SEA 3-4 M, UP TO 6 M LATER. SWELL NE 2-3 M. =
SCARBOROUGH= NE 6-7. FINE. SEA 3-4 M. SWELL NE 2-3 M. =
PARACEL= E TO NE 5-6, N 7-8 LATER. DOWN TO 4000 M IN MIST OR RAIN PATCHES IN N. SEA 2-3 M, 4-6 M LATER. SWELL NE 2-3 M. =
TONKIN= NE 5-6, N 7 LATER. DOWN TO 4000 M IN MIST OR RAIN PATCHES. SEA 2-3 M, 4 M LATER. SWELL NE 2 M. =
DANANG= NE 5-6, N 7 LATER. DOWN TO 4000 M IN MIST OR RAIN PATCHES. SEA 2-3 M, 4 M LATER. 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
  • 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 29/Nov/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 11:30 p.m. on 29 November 2017

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

    Weather Situation:
    An easterly airstream is affecting the south China coastal waters. An intense northeast monsoon is expected to reach the region later tomorrow.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East force 5 to 6, becoming north force 7 later.
    A few light rain patches, visibility relatively low in some areas.
    Moderate to rough seas.

    Nan'ao, Shanwei and South of Hong Kong:
    East force 6 to 7, becoming north force 8 later.
    Rough seas, becoming very rough later.

    Shangchuan Dao:
    East to northeast force 5 to 6, becoming north force 7 to 8 later.
    Moderate to rough seas, becoming very rough later.

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

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

    Waglan Island Wind northeast force 4
      Visibility 14 Kilometres

    Shantou Wind east-northeast force 2
      Visibility 12 Kilometres

    Dongsha Wind east-northeast force 4
      Visibility 10 Kilometres

    Huangmaozhou Wind east force 4

    Macau Wind east-southeast force 1
      Visibility 3600 Metres in mist

    Xisha Wind east-northeast force 2
      Visibility 16 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 17:30 HKT 29/NOV/2017
    (Next update at 01:30 HKT 30/NOV/2017)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS AND SEV TURB.
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:  080/10-15
       OFFSHORE:  080/20-25                            27-24
   B.   2000 FT:  080/15-20                            20
   C.   5000 FT:  120/15                               16
   D.  10000 FT:  180/8                                8
   E.  18000 FT:  240/30                               MS7
   F.  24000 FT:  240/35                               MS15
   G.  30000 FT:  240/40                               MS31
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      BECOMING CLOUDY WITH ONE OR TWO LIGHT RAIN
      PATCHES OVERNIGHT. LOCALIZED MIST PATCHES.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 3000 FT  SCT 4000 FT.
   K. VISIBILITY    : 7 KM. TEMPO 2500 M IN MIST/HAZE.
   L. 0 DEG. C LEVEL: 15000 FT      10 DEG. C LEVEL(S) : 10800 FT
   M. TURBULENCE    : MOD TO SEV OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 2.0-3.0 M     SEA TEMPERATURE    : 23 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE EAST TO NORTHEASTERLY WINDS, FRESH
     OFFSHORE. A FEW LIGHT RAIN PATCHES. LOCALIZED
     MIST PATCHES AND HAZE.=

    ===================================================================
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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