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Bulletin issued at 23:02 HKT 22/Jan/2018

At 11 p.m. at the Hong Kong Observatory the air temperature was 20 degrees Celsius and the relative humidity 85 per cent.

The air temperatures at other places were:

King's Park 19 degrees;
Wong Chuk Hang 18 degrees;
Ta Kwu Ling 18 degrees;
Lau Fau Shan 18 degrees;
Tai Po 19 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 21 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 19 degrees;
Shau Kei Wan 18 degrees;
Kowloon City 19 degrees;
Happy Valley 18 degrees;
Wong Tai Sin 19 degrees;
Stanley 19 degrees;
Kwun Tong 19 degrees;
Sham Shui Po 20 degrees;
Kai Tak Runway Park 19 degrees;
Yuen Long Park 19 degrees;
Tai Mei Tuk 18 degrees.


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


Climatological Information for 22 Jan

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Bulletin updated at 23:15 HKT 22/Jan/2018

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

The band of clouds covering southeastern China dissipated gradually today. Locally, it was mainly fine, but winds were light and there was haze with visibility once falling below 3000 metres in many places. A strong easterly airstream is expected to affect the coast of Guangdong in the next couple of days.

Weather forecast for Hong Kong (Tuesday, 23 Jan 2018)

Cloudy periods with relatively low visibility at first. Mainly fine during the day. Temperatures will range between 17 and 22 degrees. Light winds, becoming moderate to fresh easterly winds.

Outlook : Windier in the following couple of days. The weather will be cooler in the latter part of this week, turning cold early next week.


(The above forecast period is valid up to 23:59 HKT tomorrow, 23/01/2018; 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 22/Jan/2018

GALE WARNING AREAS: TAIWAN STRAIT, BASHI AND BALINTANG.

GENERAL SITUATION AT 220900 UTC:
AN EASTERLY AIRSTREAM IS EXPECTED TO AFFECT THE FORECAST AREAS LATER.

MARINE FORECAST FOR 24 HOURS FROM 221300 UTC:

HONG KONG= NE 4-5, BEC 6. DOWN TO 1000 M IN MIST PATCHES AT FIRST. SEA UP TO 3 M. TEMP 16-22 C. =
KWANGTUNG= NE 4-5, BEC 6-7. DOWN TO 2000 M IN MIST PATCHES. SEA UP TO 2 M, 3-4 M LATER. SWELL NE UP TO 2 M. =
TAIWAN STRAIT= NE 7-8. CLD. SEA 4-6 M. SWELL NE 2-3 M. =
BASHI= NE 7-8. RAIN PATCHES. SEA 4-6 M. SWELL NE 2-3 M. =
PRATAS= NE 6-7. RAIN PATCHES. SEA 3-4 M. SWELL NE UP TO 2 M. =
BALINTANG= NE 7-8. RAIN PATCHES. SEA 4-6 M. SWELL NE 2-3 M. =
SCARBOROUGH= NE 5-6. RAIN PATCHES. SEA 2-3 M. SWELL NE UP TO 2 M. =
PARACEL= NE 5. DOWN TO 2000 M IN MIST OR RAIN PATCHES IN N. SEA 2 M. SWELL NE UP TO 2 M. =
TONKIN= E TO NE 4-5. DOWN TO 500 M IN FOG OR RAIN PATCHES. SEA UP TO 2 M. =
DANANG= E TO NE 4-5. DOWN TO 2000 M IN MIST OR RAIN PATCHES. SEA UP TO 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

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    9-day Weather Forecast | UV Index Forecast | Weather Information for Fishermen

    Bulletin issued at 23:30 HKT 22/Jan/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 11:30 p.m. on 22 January 2018

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

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

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East to northeast force 4 to 5, becoming force 6.
    Visibility relatively low in some areas at first.
    Moderate seas, becoming rough.

    Nan'ao:
    East to northeast force 5 to 6, becoming force 7.
    Moderate to rough seas.

    Shanwei and South of Hong Kong:
    East to northeast force 4 to 5, becoming force 6.
    Moderate seas, becoming rough.

    Shangchuan Dao:
    East to northeast force 4 to 5.
    Moderate seas.

    Outlook for the next 48 hours
    Easterly winds of force 5 to 6, occasionally force 7.

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

    Waglan Island Wind north-northeast force 3
      Visibility 3600 Metres

    Shantou Wind northeast force 1
      Visibility 12 Kilometres

    Dongsha Wind northeast force 3
      Visibility 10 Kilometres

    Huangmaozhou Wind east-northeast force 3

    Macau Wind south-southeast force 3
      Visibility 1800 Metres in mist

    Xisha Wind northeast force 3
      Visibility 9 Kilometres

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

    Bulletin issued at 17:30 HKT 22/JAN/2018
    (Next update at 01:30 HKT 23/JAN/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AN EASTERN AIRSTREAM IS AFFECTING THE SOUTH
     CHINA COASTAL AREAS GRADUALLY.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  020/5
       OFFSHORE:  040/5-10
                  BECMG 090/10-15                      22-16
   B.   2000 FT:  040/10                               16
   C.   5000 FT:  240/10                               12
   D.  10000 FT:  270/20                               6
   E.  18000 FT:  270/45                               MS6
   F.  24000 FT:  280/60                               MS13
   G.  30000 FT:  280/60                               MS31
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      200-600 FT
   I. WEATHER       : 
      CLOUDY PERIODS. LOCALISED HAZE/MIST.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT SCT 4000 FT
   K. VISIBILITY    : 6 KM.  TEMPO 1500 M IN MIST/HAZE.
   L. 0 DEG. C LEVEL: 15000 FT      10 DEG. C LEVEL(S) : 6600 FT
   M. TURBULENCE    : NIL
   N. SEA STATE     : 0.5-1.0 M     SEA TEMPERATURE    : 18 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH EASTERLY WINDS. MAINLY FINE.
     LOCALIZED MIST/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.

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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 20:11 HKT on 01 Dec 17

    VHHK SIGMET 4 VALID 010820/011220 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1642 E11400 - N1736 E11312 - N1812 E11512 - N1642 E11400 TOP FL450 MOV W 05KT NC= VHHK SIGMET 5 VALID 011220/011620 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1806 E11506 - N1642 E11400 - N1712 E11330 - N1818 E11448 - N1806 E11506 TOP FL420 MOV W 05KT WKN=

    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
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    Bulletin issued at 15:30 HKT 04/Jan/2018


    Tropical Cyclone Warning

    At 040600 UTC, Tropical Depression Bolaven (1801) has weakened into an area of low pressure.

    No further warnings on this area of low pressure will be issued by the Hong Kong Observatory unless regeneration takes place.



    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 22/Jan/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     21.5 C
Minimum Air Temperature                     16.8 C
Grass Minimum Temperature                   16.4 C
Relative Humidity                        65 - 91 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January            42.6 mm
Against an average of                       14.7 mm

Other Stations                Min                  Max
King's Park                  16.2 C               21.3 C
Wong Chuk Hang               16.4 C               22.4 C
Ta Kwu Ling                  15.7 C               22.9 C
Lau Fau Shan                 16.1 C               21.5 C
Tai Po                       16.6 C               20.3 C
Sha Tin                      16.5 C               21.5 C
Tuen Mun                     16.7 C               22.4 C
Tseung Kwan O                15.7 C               20.9 C
Sai Kung                     16.3 C               19.6 C
Cheung Chau                  16.1 C               20.7 C
Chek Lap Kok                 17.4 C               22.6 C
Tsing Yi                     16.9 C               22.2 C
Shek Kong                    16.4 C               23.2 C
Tsuen Wan Ho Koon            15.3 C               22.6 C
Tsuen Wan Shing Mun Valley   16.6 C               23.4 C
Hong Kong Park               16.6 C               20.8 C
Shau Kei Wan                 15.7 C               19.0 C
Kowloon City                 16.1 C               22.6 C
Happy Valley                 16.6 C               21.2 C
Wong Tai Sin                 16.4 C               22.2 C
Stanley                      16.2 C               18.8 C
Kwun Tong                    15.9 C               21.1 C
Sham Shui Po                 17.0 C               22.8 C
Kai Tak Runway Park          16.7 C               19.9 C
Yuen Long Park               15.4 C               23.2 C
Tai Mei Tuk               16.2 C               21.5 C

Duration of sunshine (King's Park):              4.9 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 6.
Sea surface temperature (Waglan Island):        16.9 C 

Yesterday's (21 Jan 2018) 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 in the
past, the hourly mean ambient gamma radiation dose rate may
vary between 0.06 and 0.3 microsievert per hour. (1
microsievert = 0.000001 sievert = 0.001 millisievert)

    2. Temporal variations are generally caused by changes in
meteorological conditions such as rainfall, wind and
barometric pressure.

    3. Spatial variations are generally caused by differences in
the radioactive content of local rock and soil.

    4. The data displayed is provisional. Only limited data
validation has been carried out.
    Climatological Information for 21 Jan
     2003copy right image | Important notices | Privacy policy Last revision date: <22 Jan 2018> 

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