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Bulletin issued at 04:02 HKT 22/Jan/2018

At 4 a.m. at the Hong Kong Observatory the air temperature was 18 degrees Celsius and the relative humidity 86 per cent.

The air temperatures at other places were:

King's Park 17 degrees;
Wong Chuk Hang 16 degrees;
Ta Kwu Ling 15 degrees;
Lau Fau Shan 16 degrees;
Tai Po 16 degrees;
Sha Tin 16 degrees;
Tuen Mun 16 degrees;
Tseung Kwan O 15 degrees;
Sai Kung 16 degrees;
Cheung Chau 16 degrees;
Chek Lap Kok 18 degrees;
Tsing Yi 16 degrees;
Shek Kong 15 degrees;
Tsuen Wan Ho Koon 16 degrees;
Tsuen Wan Shing Mun Valley 16 degrees;
Hong Kong Park 17 degrees;
Shau Kei Wan 17 degrees;
Kowloon City 17 degrees;
Happy Valley 17 degrees;
Wong Tai Sin 17 degrees;
Stanley 17 degrees;
Kwun Tong 17 degrees;
Sham Shui Po 18 degrees;
Kai Tak Runway Park 18 degrees;
Yuen Long Park 15 degrees;
Tai Mei Tuk 16 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

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Bulletin updated at 03:45 HKT 22/Jan/2018

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

A band of clouds is covering the coast of Guangdong.

Weather forecast for today

Mainly cloudy with relatively low visibility. Sunny periods during the day. Temperatures will range between 17 and 23 degrees. Light to moderate northeasterly winds.

Outlook : Mainly fine on Tuesday. Becoming cloudier with temperatures falling progressively in the middle and latter parts of this week.


(The above forecast period is valid up to 23:59 HKT today, 22/01/2018; 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 21/Jan/2018

GALE WARNING AREAS: TAIWAN STRAIT, BASHI AND BALINTANG.

GENERAL SITUATION AT 210900 UTC:
THE NORTHEAST MONSOON IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 211300 UTC:

HONG KONG= NE 4-5. DOWN TO 2000 M IN MIST PATCHES. SEA UP TO 2 M. TEMP 17-23 C. =
KWANGTUNG= NE 4-5, UP TO 7 IN E LATER. DOWN TO 2000 M IN MIST PATCHES. SEA 2 M, UP TO 4 M LATER. SWELL NE UP TO 2 M. =
TAIWAN STRAIT= NE 5-6, UP TO 8 LATER. DOWN TO 500 M IN FOG OR LGT RAIN PATCHES. SEA 2-3 M, UP TO 6 M LATER. SWELL NE UP TO 2 M. =
BASHI= NE 5-6, 7-8 LATER. DOWN TO 500 M IN FOG OR RAIN PATCHES. SEA 2-3 M, 4-6 M LATER. SWELL NE UP TO 2 M. =
PRATAS= NE 5-6, UP TO 7 LATER. RAIN PATCHES. SEA 2-3 M, UP TO 4 M LATER. SWELL NE UP TO 2 M. =
BALINTANG= NE 5-6, 7-8 LATER. RAIN PATCHES. SEA 2-3 M, 4-6 M LATER. SWELL NE UP TO 2 M. =
SCARBOROUGH= NE 4-5, 6 LATER. RAIN PATCHES. SEA 2 M, 3 M LATER. 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. =
DANANG= E TO NE 4-5. DOWN TO 1000 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

    Current Weather | Local Weather Forecast | Regional Temperature Forecast in HK
    9-day Weather Forecast | UV Index Forecast | Weather Information for Fishermen

    Bulletin issued at 03:30 HKT 22/Jan/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 3:30 a.m. on 22 January 2018

    Warnings:
    Strong winds in Nan'ao and Shanwei.

    Weather Situation:
    The northeast monsoon is affecting the south China coastal waters.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    Northeast force 4 to 5.
    Mist patches.
    Moderate seas.

    Nan'ao:
    Northeast force 4 to 5, becoming force 6 to 7 later.
    Moderate seas, becoming rough seas later.

    Shanwei:
    Northeast force 4 to 5, becoming force 6 later.
    Moderate seas, becoming rough seas later.

    South of Hong Kong and Shangchuan Dao:
    Northeast force 4 to 5.
    Moderate seas.

    Outlook for the next 48 hours
    East to northeasterly 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 4500 Metres

    Shantou Wind east-northeast force 1
      Visibility 7 Kilometres

    Huangmaozhou Wind northeast force 4

    Xisha Wind east-northeast force 2
      Visibility 10 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 01:30 HKT 22/JAN/2018
    (Next update at 9:00-9:30 HKT 22/JAN/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THE EASTERLY AIRSTREAM AFFECTING THE COASTAL
     AREAS OF GUANGDONG IS MODERATING GRADUALLY.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  020/5
       OFFSHORE:  040/5-10                             18-21
   B.   2000 FT:  040/10                               16
   C.   5000 FT:  350/5-10                             13
   D.  10000 FT:  260/25                               5
   E.  18000 FT:  260/50                               MS8
   F.  24000 FT:  270/60                               MS14
   G.  30000 FT:  280/65                               MS30
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      MAINLY CLOUDY WITH MIST/HAZE. SUNNY PERIODS
      DURING THE DAY.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT SCT 5000 FT
   K. VISIBILITY    : 7 KM.  TEMPO 2000 M IN MIST/HAZE.
   L. 0 DEG. C LEVEL: 15500 FT      10 DEG. C LEVEL(S) : 6800 FT
   M. TURBULENCE    : NIL
   N. SEA STATE     : 0.5-1.0 M     SEA TEMPERATURE    : 17 DEG
IV.  FURTHER OUTLOOK: 
     LIGHT TO MODERATE NORTHEASTERLY WINDS. SUNNY
     PERIODS. LOCALIZED 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 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
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