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Bulletin issued at 22:02 HKT 27/Jan/2018

At 10 p.m. at the Hong Kong Observatory the air temperature was 16 degrees Celsius and the relative humidity 84 per cent.

The air temperatures at other places were:

King's Park 15 degrees;
Wong Chuk Hang 16 degrees;
Ta Kwu Ling 16 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 17 degrees;
Tsing Yi 17 degrees;
Shek Kong 17 degrees;
Tsuen Wan Ho Koon 15 degrees;
Tsuen Wan Shing Mun Valley 16 degrees;
Hong Kong Park 16 degrees;
Shau Kei Wan 15 degrees;
Kowloon City 16 degrees;
Happy Valley 16 degrees;
Wong Tai Sin 16 degrees;
Stanley 16 degrees;
Kwun Tong 15 degrees;
Sham Shui Po 17 degrees;
Kai Tak Runway Park 16 degrees;
Yuen Long Park 17 degrees;
Tai Mei Tuk 15 degrees.


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


Climatological Information for 27 Jan

Regional Weather in Hong Kong

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Bulletin updated at 21:45 HKT 27/Jan/2018

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

A cool northeast monsoon is affecting the coast of Guangdong. A cold front is expected to form over the northern part of southern China and move southwards. It will move across the south China coast tomorrow.

Weather forecast for tonight and tomorrow

Mainly cloudy with relatively low visibility. Sunny intervals during the day tomorrow with a maximum temperature of around 19 degrees. Moderate to fresh easterly winds, strengthening from the north with a few rain patches later tomorrow. It will become cold appreciably. The minimum temperature tomorrow night will be about 12 degrees in the urban areas, and a couple of degrees lower in the New Territories.

Outlook : Cold weather will persist next week. The minimum temperatures will be generally 9 degrees or below. The weather will begin to improve next Thursday.


(The above forecast period is valid up to 23:59 HKT tomorrow, 28/01/2018; 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 27/Jan/2018

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

GENERAL SITUATION AT 270900 UTC:
AN INTENSE NORTHEAST MONSOON IS EXPECTED TO AFFECT THE FORECAST AREAS LATER.

MARINE FORECAST FOR 24 HOURS FROM 271300 UTC:

HONG KONG= E 6-7, N UP TO 8 LATER. DOWN TO 4000 M IN MIST OR RAIN PATCHES. SEA 3-4 M, UP TO 6 M LATER. SWELL E 2 M. TEMP 19-12 C. =
KWANGTUNG= E TO NE 6-7, N 7-8 LATER. DOWN TO 4000 M IN MIST OR RAIN PATCHES. SEA 3-4 M, UP TO 6 M LATER. SWELL E TO NE 2-3 M. =
TAIWAN STRAIT= E TO NE 6-7, N 8 LATER. DOWN TO 4000 M IN MIST OR RAIN PATCHES. SEA 3-4 M, 6 M LATER. SWELL NE 3 M. =
BASHI= E 6-7, N UP TO 8 LATER. DOWN TO 4000 M IN MIST OR RAIN PATCHES. SEA 3-4 M, UP TO 6 M LATER. SWELL NE 3-4 M. =
PRATAS= E 6-7, N UP TO 8 LATER. RAIN PATCHES. SEA 3-4 M, UP TO 6 M LATER. SWELL NE 3 M. =
BALINTANG= E 6-7, OCNL 8. RAIN PATCHES. SEA UP TO 6 M. SWELL NE 3 M. =
SCARBOROUGH= E TO NE 6-7. RAIN PATCHES. SEA 3-4 M. SWELL NE 3 M. =
PARACEL= E 6-7, N UP TO 8 LATER. RAIN PATCHES. SEA 3-4 M, UP TO 6 M LATER. SWELL E TO NE 3 M. =
TONKIN= SE 5-6, BEC N 7-8. DOWN TO 4000 M IN MIST OR RAIN PATCHES. SEA 2-3 M, BEC 4-6 M. SWELL NE 2 M, 3 M LATER. =
DANANG= E 5-6. RAIN PATCHES. SEA 2-3 M. SWELL E TO 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
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    • SOUTH CHINA COASTAL WATERS
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    South China Coastal Waters

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    Bulletin issued at 19:30 HKT 27/Jan/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 7:30 p.m. on 27 January 2018

    Warnings:
    Gale force winds in all areas.

    Weather Situation:
    A cold front is expected to move across the south China coastal waters tomorrow.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East force 6 to 7, becoming north up to force 8 later.
    A few rain patches and misty.
    Rough seas, becoming very rough later.

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

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

    Outlook for the next 48 hours
    Northerly 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 south-southeast force 1
      Visibility 30 Kilometres

    Dongsha Wind east-northeast force 4
      Visibility 10 Kilometres

    Huangmaozhou Wind east force 5

    Macau Wind north-northeast force 2
      Visibility 7 Kilometres

    Xisha Wind east-northeast force 3
      Visibility 17 Kilometres

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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 17:30 HKT 27/JAN/2018
    (Next update at 01:30 HKT 28/JAN/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS AND SEV TURB.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THE NORTHEAST MONSOON 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:  070/10
       OFFSHORE:  080/20-25                            17-15
   B.   2000 FT:  080/20-25                            13
   C.   5000 FT:  180/15                               12
   D.  10000 FT:  270/20                               6
   E.  18000 FT:  250/55                               MS7
   F.  24000 FT:  250/55                               MS14
   G.  30000 FT:  250/55                               MS31
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      2600-4600 FT.
   I. WEATHER       : 
      MAINLY CLOUDY.  LOCALISED MIST/HAZE.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT SCT 3000 FT
   K. VISIBILITY    : 7 KM. TEMPO 4000 M IN HAZE/MIST.
   L. 0 DEG. C LEVEL: 14500 FT      10 DEG. C LEVEL(S) : 1400,3200,6200 FT
   M. TURBULENCE    : MOD TO SEV OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 3.0-4.0 M     SEA TEMPERATURE    : 17 DEG
IV.  FURTHER OUTLOOK: 
     LIGHT TO TO MODERATE EASTERLY WINDS, FRESH
     OFFSHORE BECOMING FRESH TO STRONG NORTHERLY
     WINDS.  CLOUDY WITH MIST AND A FEW RAIN PATCHES.
     SUNNY INTERVALS DURING THE DAY.=

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

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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 27/Jan/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     18.3 C
Minimum Air Temperature                     15.6 C
Grass Minimum Temperature                   16.2 C
Relative Humidity                        80 - 89 Percent
Rainfall                                      Trace 
Total rainfall since 1st January            42.6 mm
Against an average of                       21.3 mm

Other Stations                Min                  Max
King's Park                  14.7 C               17.7 C
Wong Chuk Hang               15.1 C               18.2 C
Ta Kwu Ling                  14.4 C               20.5 C
Lau Fau Shan                 14.8 C               23.6 C
Tai Po                       15.0 C               19.3 C
Sha Tin                      15.1 C               18.6 C
Tuen Mun                     15.6 C               20.5 C
Tseung Kwan O                14.7 C               17.5 C
Sai Kung                     14.9 C               17.4 C
Cheung Chau                  15.3 C               19.7 C
Chek Lap Kok                 16.2 C               22.7 C
Tsing Yi                     15.3 C               20.0 C
Shek Kong                    14.8 C               21.1 C
Tsuen Wan Ho Koon            13.9 C               20.0 C
Tsuen Wan Shing Mun Valley   14.7 C               21.3 C
Hong Kong Park               14.8 C               18.4 C
Shau Kei Wan                 14.0 C               16.6 C
Kowloon City                 14.4 C               18.1 C
Happy Valley                 14.9 C               18.4 C
Wong Tai Sin                 14.4 C               17.8 C
Stanley                      14.9 C               17.2 C
Kwun Tong                    14.0 C               17.2 C
Sham Shui Po                 15.1 C               20.6 C
Kai Tak Runway Park          15.2 C               17.7 C
Yuen Long Park               15.0 C               21.2 C
Tai Mei Tuk               14.2 C               18.7 C

Duration of sunshine (King's Park):              0.2 H
The mean UV index recorded at King's Park yesterday was 1,
the UV intensity was Low.
The maximum UV index for yesterday was 3.
Sea surface temperature (Waglan Island):        17.0 C 

Yesterday's (26 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                         0.15
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 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 26 Jan
     2003copy right image | Important notices | Privacy policy Last revision date: <27 Jan 2018> 

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