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Bulletin issued at 11:02 HKT 28/Jan/2018

At 11 a.m. at the Hong Kong Observatory the air temperature was 18 degrees Celsius and the relative humidity 83 per cent.
During the past hour the mean UV Index recorded at King's Park was 1. The intensity of UV radiation was low.

The air temperatures at other places were:

King's Park 18 degrees;
Wong Chuk Hang 18 degrees;
Ta Kwu Ling 17 degrees;
Lau Fau Shan 17 degrees;
Tai Po 17 degrees;
Sha Tin 17 degrees;
Tuen Mun 18 degrees;
Tseung Kwan O 19 degrees;
Sai Kung 18 degrees;
Cheung Chau 18 degrees;
Chek Lap Kok 18 degrees;
Tsing Yi 18 degrees;
Shek Kong 18 degrees;
Tsuen Wan Ho Koon 17 degrees;
Tsuen Wan Shing Mun Valley 18 degrees;
Hong Kong Park 18 degrees;
Shau Kei Wan 18 degrees;
Kowloon City 18 degrees;
Happy Valley 19 degrees;
Wong Tai Sin 18 degrees;
Stanley 19 degrees;
Kwun Tong 18 degrees;
Sham Shui Po 18 degrees;
Kai Tak Runway Park 19 degrees;
Yuen Long Park 18 degrees;
Tai Mei Tuk 18 degrees.


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


Climatological Information for 28 Jan

Regional Weather in Hong Kong

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Hong Kong Climatology


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Bulletin updated at 10:45 HKT 28/Jan/2018

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

A cold front is moving southwards. It is expected to move across the vicinity of the Pearl River Estuary in the afternoon.

Weather forecast for today

Mainly cloudy. Winds will be light with relatively low visibility at first. Winds will strengthen from the north with a few rain patches in the afternoon. Temperatures will drop appreciably. It will become cold. The minimum temperature tonight will be about 12 degrees in the urban areas, and a couple of degrees lower in the New Territories.

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


(The above forecast period is valid up to 23:59 HKT today, 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 09:00 HKT 28/Jan/2018

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

GENERAL SITUATION AT 272100 UTC:
COLD FRONT 22N 108E 23N 114E 24N 118E S 15KT.

MARINE FORECAST FOR 24 HOURS FROM 280100 UTC:

HONG KONG= NE 5-6, BEC N UP TO 8. RAIN PATCHES. DOWN TO 4000 M IN MIST PATCHES AT FIRST. SEA 2-3 M, BEC 6 M. SWELL E TO NE 2 M. TEMP 19-9 C. =
KWANGTUNG= E TO NE 6-7, BEC N 7-8. RAIN PATCHES. DOWN TO 4000 M IN MIST PATCHES AT FIRST. SEA 3-4 M, BEC 4-6 M. SWELL E TO NE 2-3 M. =
TAIWAN STRAIT= NE 6-7, BEC N 8. RAIN PATCHES. SEA 3-4 M, BEC 6 M. SWELL NE 3 M. =
BASHI= E 6-7, BEC N UP TO 8. RAIN PATCHES. SEA 3-4 M, BEC 6 M. SWELL NE 3-4 M. =
PRATAS= E 6-7, BEC N UP TO 8. RAIN PATCHES. SEA 3-4 M, BEC 6 M. SWELL NE 3 M. =
BALINTANG= E TO SE 6-7, BEC N UP TO 8. RAIN PATCHES. SEA 3-4 M, BEC 6 M. SWELL NE 3 M. =
SCARBOROUGH= E TO NE 5-6, N UP TO 8 LATER. RAIN PATCHES. SEA 2-3 M, 6 M LATER. SWELL NE 3 M. =
PARACEL= E TO NE 5-6, BEC N UP TO 8. RAIN PATCHES. SEA 2-3 M, BEC 6 M. SWELL E TO NE 3 M. =
TONKIN= N 7-8. RAIN PATCHES. SEA 4-6 M. SWELL NE 2-3 M. =
DANANG= E 5-6, BEC N 7-8. RAIN PATCHES. SEA 2-3 M, BEC 4-6 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 09:30 HKT 28/Jan/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 28 January 2018

    Warnings:
    Gale force winds in all areas.

    Weather Situation:
    A cold front will move across the coastal waters of Guangdong during the day.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    Northeast force 5 to 6, becoming north up to force 8.
    A few rain patches. Visibility relatively low in some areas at first.
    Moderate to rough seas, becoming very rough.

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

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

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

    Waglan Island Wind north-northeast force 2
      Visibility 11 Kilometres

    Shantou Wind east force 1
      Visibility 8 Kilometres

    Dongsha Wind northeast force 4
      Visibility 9 Kilometres in rain

    Huangmaozhou Wind northeast force 4

    Macau Wind north force 2
      Visibility 5000 Metres

    Xisha Wind calm
      Visibility 11 Kilometres

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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 09:30 HKT 28/JAN/2018
    (Next update at 17:30 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. MEANWHILE, A COLD FRONT IS
     MOVING SOUTHWARDS. IT IS EXPECTED TO MOVE ACROSS
     THE COAST OF GUANGDONG DURING THE DAY.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  360/10-15
       OFFSHORE:  060/15-20
                  BEC 360/20-25                        18-13
   B.   2000 FT:  100/15-20
                  BEC 020/20-25                        14
   C.   5000 FT:  200/10-15                            13
   D.  10000 FT:  260/25                               6
   E.  18000 FT:  260/60                               MS5
   F.  24000 FT:  260/60                               MS13
   G.  30000 FT:  260/65                               MS27
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      2000-3400 FT
   I. WEATHER       : 
      MAINLY CLOUDY WITH A FEW RAIN PATCHES.
      LOCALISED MIST PATCHES.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1200 FT  SCT 2500 FT.
   K. VISIBILITY    : 7 KM. TEMPO 3500 M IN RAIN/MIST.
   L. 0 DEG. C LEVEL: 14500 FT      10 DEG. C LEVEL(S) : 7600 FT
   M. TURBULENCE    : MOD TO SEV OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 2.0-3.5 M     SEA TEMPERATURE    : 17 DEG
IV.  FURTHER OUTLOOK: 
     FRESH TO STRONG NORTHERLY WINDS. CLOUDY WITH A
     FEW 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.

    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 28/Jan/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     17.1 C
Minimum Air Temperature                     14.0 C
Grass Minimum Temperature                   15.0 C
Relative Humidity                        71 - 89 Percent
Rainfall                                      Trace 
Total rainfall since 1st January            42.6 mm
Against an average of                       22.0 mm

Other Stations                Min                  Max
King's Park                  13.4 C               17.5 C
Wong Chuk Hang               13.7 C               16.7 C
Ta Kwu Ling                  12.1 C               17.9 C
Lau Fau Shan                 12.9 C               20.0 C
Tai Po                       12.8 C               16.8 C
Sha Tin                      13.0 C               17.2 C
Tuen Mun                     13.4 C               18.3 C
Tseung Kwan O                12.7 C               16.0 C
Sai Kung                     12.9 C               16.0 C
Cheung Chau                  13.8 C               17.6 C
Chek Lap Kok                 13.7 C               19.0 C
Tsing Yi                     13.7 C               18.3 C
Shek Kong                    12.7 C               19.0 C
Tsuen Wan Ho Koon            12.4 C               17.7 C
Tsuen Wan Shing Mun Valley   13.3 C               19.1 C
Hong Kong Park               13.6 C               17.4 C
Shau Kei Wan                 12.6 C               15.6 C
Kowloon City                 12.9 C               16.5 C
Happy Valley                 13.8 C               17.5 C
Wong Tai Sin                 13.3 C               16.4 C
Stanley                      13.3 C               15.9 C
Kwun Tong                    12.4 C               16.2 C
Sham Shui Po                 13.5 C               18.8 C
Kai Tak Runway Park          13.7 C               16.6 C
Yuen Long Park               12.4 C               19.2 C
Tai Mei Tuk               12.4 C               18.3 C

Duration of sunshine (King's Park):              1.6 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 (27 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 27 Jan
     2003copy right image | Important notices | Privacy policy Last revision date: <28 Jan 2018> 

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