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Bulletin issued at 01:02 HKT 27/Jan/2018

At 1 a.m. at the Hong Kong Observatory the air temperature was 15 degrees Celsius and the relative humidity 88 per cent.

The air temperatures at other places were:

King's Park 14 degrees;
Wong Chuk Hang 15 degrees;
Ta Kwu Ling 14 degrees;
Lau Fau Shan 14 degrees;
Tai Po 14 degrees;
Sha Tin 14 degrees;
Tuen Mun 15 degrees;
Tseung Kwan O 14 degrees;
Sai Kung 14 degrees;
Cheung Chau 15 degrees;
Chek Lap Kok 16 degrees;
Tsing Yi 15 degrees;
Shek Kong 15 degrees;
Tsuen Wan Ho Koon 14 degrees;
Tsuen Wan Shing Mun Valley 14 degrees;
Hong Kong Park 15 degrees;
Shau Kei Wan 15 degrees;
Kowloon City 14 degrees;
Happy Valley 15 degrees;
Wong Tai Sin 14 degrees;
Stanley 15 degrees;
Kwun Tong 14 degrees;
Sham Shui Po 15 degrees;
Kai Tak Runway Park 15 degrees;
Yuen Long Park 14 degrees;
Tai Mei Tuk 14 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 00:45 HKT 27/Jan/2018

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

A cool northeast monsoon affected the coast of Guangdong gradually yesterday. Locally, it was mainly cloudy with one or two light rain patches, visibility was relatively low. The cool northeast monsoon will continue to affect the coast of Guangdong today. A cold front will cross the south China coast later on Sunday. It will become cold appreciably with a few rain patches over the region. The associated intense winter monsoon will bring persistently cold weather to southern China next week.

Weather forecast for Hong Kong

Cloudy with one or two light rain patches. Visibility relatively low at first. Cool with a minimum temperature of around 15 degrees over the urban areas in the morning, and a couple of degrees lower in the New Territories. The maximum temperature will be about 17 degrees. Moderate to fresh east to northeasterly winds, occasionally strong offshore and on high ground.

Outlook : It will become cold appreciably with a few rain patches later on Sunday. Cold weather will persist next week with minimum temperatures of around 9 degrees over the urban areas.


(The above forecast period is valid up to 23:59 HKT today, 27/01/2018; 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 26/Jan/2018

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

GENERAL SITUATION AT 260900 UTC:
AN INTENSE NORTHEAST MONSOON IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 261300 UTC:

HONG KONG= E TO NE 6-7, OCNL 8. LGT RAIN PATCHES. DOWN TO 4000 M IN MIST PATCHES AT FIRST. SEA UP TO 6 M. SWELL E 2-3 M. TEMP 15-17 C. =
KWANGTUNG= E TO NE 7-8. LGT RAIN PATCHES. SEA 4-6 M. SWELL E TO NE 2-3 M. =
TAIWAN STRAIT= NE 8, OCNL 9. CLD. SEA UP TO 8 M. SWELL NE 3-4 M. =
BASHI= E TO NE 7-8. RAIN PATCHES. SEA 4-6 M. SWELL NE 3-4 M. =
PRATAS= E TO NE 7-8. RAIN PATCHES. SEA 4-6 M. SWELL NE 3-4 M. =
BALINTANG= E TO NE 7-8. RAIN PATCHES. SEA 4-6 M. SWELL NE 3-4 M. =
SCARBOROUGH= NE 6-7, OCNL 8. RAIN PATCHES. SEA UP TO 6 M. SWELL NE 3-4 M. =
PARACEL= E TO NE 6-7, OCNL 8. RAIN PATCHES. SEA UP TO 6 M. SWELL E TO NE 3 M. =
TONKIN= E 5-6, OCNL 7 AT FIRST. DOWN TO 4000 M IN MIST OR RAIN PATCHES. SEA 2-3 M, UP TO 4 M AT FIRST. SWELL E TO NE 2 M. =
DANANG= E 5-6. DOWN TO 4000 M IN MIST OR 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
  • Tidal Information

    • SOUTH CHINA COASTAL WATERS
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    South China Coastal Waters

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    Bulletin issued at 23:30 HKT 26/Jan/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 11:30 p.m. on 26 January 2018

    Warnings:
    Gale force winds in all areas.

    Weather Situation:
    An intense northeast monsoon is affecting the coastal waters of Guangdong.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East to northeast force 6 to 7, occasionally force 8.
    A few light rain patches. Visibility relatively low in some areas at first.
    Rough to very rough seas.

    Nan'ao and Shanwei:
    East to northeast force 7 to 8.
    Rough to very rough seas.

    South of Hong Kong and Shangchuan Dao:
    East to northeast force 6 to 7, occasionally force 8.
    Rough to very rough seas.

    Outlook for the next 48 hours
    Easterly winds of force 6 to 7, becoming northerly winds of force 7 to 8.

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

    Waglan Island Wind east-northeast force 6
      Visibility 8 Kilometres

    Shantou Wind east-northeast force 2
      Visibility 30 Kilometres

    Huangmaozhou Wind east force 5

    Macau Wind north-northeast force 3
      Visibility 7 Kilometres

    Xisha Wind east-northeast force 3
      Visibility 11 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 27/JAN/2018
    (Next update at 9:00-9:30 HKT 27/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 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  040/10-15
       OFFSHORE:  090/20-25, OCNL 30                   15-20
   B.   2000 FT:  090/20-25, OCNL 30 IN S              12
   C.   5000 FT:  160/15-20                            13
   D.  10000 FT:  250/15                               9
   E.  18000 FT:  250/40                               MS4
   F.  24000 FT:  270/45                               MS14
   G.  30000 FT:  250/45                               MS28
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      3400-4200 FT.
   I. WEATHER       : 
      CLOUDY WITH A FEW LIGHT RAIN PATCHES.
      LOCALISED MIST.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT SCT 2500 FT BKN 5000 FT.
   K. VISIBILITY    : 7 KM. TEMPO 4000 M IN RAIN/MIST.
   L. 0 DEG. C LEVEL: 16500 FT      10 DEG. C LEVEL(S) : 3000, 6400, 9000 FT
   M. TURBULENCE    : MOD TO SEV OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 2.5-4.0 M     SEA TEMPERATURE    : 17 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH EAST TO NORTHEASTERLY WINDS,
     STRONG OFFSHORE AND ON HIGH GROUND.  CLOUDY WITH
     A FEW LIGHT RAIN PATCHES.=

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

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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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