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Bulletin issued at 01:02 HKT 01/Jan/2019

At 1 a.m. at the Hong Kong Observatory the air temperature was 12 degrees Celsius and the relative humidity 72 per cent.

Please be reminded that:

The Cold Weather Warning is now in force. Cold weather might cause adverse health effects. Members of the public should take care to keep warm.

The air temperatures at other places were:

King's Park 11 degrees;
Wong Chuk Hang 12 degrees;
Ta Kwu Ling 9 degrees;
Lau Fau Shan 9 degrees;
Tai Po 9 degrees;
Sha Tin 10 degrees;
Tuen Mun 10 degrees;
Tseung Kwan O 9 degrees;
Sai Kung 11 degrees;
Cheung Chau 11 degrees;
Chek Lap Kok 11 degrees;
Tsing Yi 11 degrees;
Shek Kong 9 degrees;
Tsuen Wan Ho Koon 9 degrees;
Tsuen Wan Shing Mun Valley 10 degrees;
Hong Kong Park 12 degrees;
Shau Kei Wan 12 degrees;
Kowloon City 10 degrees;
Happy Valley 12 degrees;
Wong Tai Sin 10 degrees;
Stanley 13 degrees;
Kwun Tong 10 degrees;
Sham Shui Po 10 degrees;
Kai Tak Runway Park 11 degrees;
Yuen Long Park 9 degrees;
Tai Mei Tuk 9 degrees.


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


Climatological Information for 1 Jan

Regional Weather in Hong Kong

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Bulletin updated at 00:45 HKT 01/Jan/2019

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

An intense winter monsoon persisted over Guangdong yesterday. Locally, it was mainly cloudy. The weather was cold in the morning. There were sunny intervals during the day. Under the influence of an intense winter monsoon, it is expected to remain cold with a few rain patches over Guangdong in the next couple of days.

Besides, an area of low pressure over the southern part of the South China Sea intensified into a tropical depression yesterday. At 11 p.m. last night, the tropical depression was centred about 480 kilometres southwest of Nansha Dao. It is forecast to move west-southwest at about 16 kilometres per hour in the general direction of the seas south of Vietnam.

Weather forecast for Hong Kong

Cloudy periods. It will be cold. The minimum temperature will be about 11 degrees in the urban areas, and a couple of degrees lower in the New Territories. Sunny intervals during the day with a maximum temperature of around 16 degrees. One or two rain patches at night. Moderate to fresh northerly winds.

Outlook : Remaining cold in the following couple of days with a few rain patches. Temperatures rising gradually towards the weekend.


(The above forecast period is valid up to 23:59 HKT today, 01/01/2019; 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 31/Dec/2018

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

GENERAL SITUATION AT 310900 UTC:
AN INTENSE NORTHEAST MONSOON IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 311300 UTC:

HONG KONG= N TO NE 6-7, OCNL 8. CLD. RAIN PATCHES LATER. SEA UP TO 6 M. SWELL N TO NE 2-3 M. TEMP 11-16 C. =
KWANGTUNG= N TO NE 7-8. CLD. RAIN PATCHES LATER. SEA 4-6 M. SWELL N TO NE 3-5 M. =
TAIWAN STRAIT= N TO NE 8, OCNL 9. RAIN PATCHES. SEA UP TO 8 M. SWELL N TO NE 3-5 M. =
BASHI= NE 7-8. RAIN PATCHES. SEA 4-6 M. SWELL N TO NE 3-5 M. =
PRATAS= N TO NE 7-8. RAIN PATCHES. SEA 4-6 M. SWELL N TO NE 3-5 M. =
BALINTANG= NE 7-8. RAIN PATCHES. SEA 4-6 M. SWELL N TO NE 3-5 M. =
SCARBOROUGH= NE 6-7, OCNL 8. ISOL SHOWERS AND TS. SEA UP TO 6 M. SWELL N TO NE 3-5 M. =
PARACEL= N TO NE 7-8, OCNL 9. ISOL SHOWERS AND TS. SEA UP TO 8 M. SWELL N TO NE 3-5 M. =
TONKIN= N TO NE 6-7, OCNL 8. RAIN PATCHES. SEA UP TO 6 M. SWELL N TO NE 2-3 M. =
DANANG= N TO NE 7-8, OCNL 9. ISOL SHOWERS AND TS. SEA UP TO 8 M. SWELL N TO NE 3-5 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.


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    • SOUTH CHINA COASTAL WATERS
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    South China Coastal Waters

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    Bulletin issued at 23:30 HKT 31/Dec/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 11:30 p.m. on 31 December 2018

    Warnings:
    Gale force winds in all areas.

    Weather Situation:
    An intense northeast monsoon persists over the south China coastal waters.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    North to northeast force 6 to 7, occasionally force 8.
    A few rain patches later.
    Rough to very rough seas.

    Nan'ao:
    North to northeast force 8.
    Very rough seas.

    Shanwei, South of Hong Kong and Shangchuan Dao:
    North to northeast force 7 to 8.
    Rough to very rough seas.

    Outlook for the next 48 hours
    North to northeasterly winds of force 7 to 8, becoming easterly winds of force 6 to 7 later.

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

    Waglan Island Wind north force 4

    Shantou Wind south-southwest force 1
      Visibility 26 Kilometres

    Huangmaozhou Wind north force 4

    Xisha Wind northeast force 3
      Visibility 14 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 01/JAN/2019
    (Next update at 9:00-9:30 HKT 01/JAN/2019)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS AND SEV TURB.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AN INTENSE NORTHEAST MONSOON PERSISTS OVER THE
     SOUTH CHINA COASTAL AREAS.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  360/10-15, OCNL 20
       OFFSHORE:  010/20, OCNL 25                      10-16
   B.   2000 FT:  050/20-25                            10
   C.   5000 FT:  090/15                               11
   D.  10000 FT:  260/15                               3
   E.  18000 FT:  250/40                               MS6
   F.  24000 FT:  250/55                               MS14
   G.  30000 FT:  260/60                               MS27
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      2400-3100 FT
   I. WEATHER       : 
      CLOUDY PERIODS. SUNNY INTERVALS DURING THE DAY.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2500 FT  SCT 4000 FT  BKN 10000 FT.
   K. VISIBILITY    : 9 KM.
   L. 0 DEG. C LEVEL: 14000 FT      10 DEG. C LEVEL(S) : NEAR SURFACE, 1600, 2600, 6200 FT
   M. TURBULENCE    : MOD TO SEV.
   N. SEA STATE     : 2.0-3.0 M     SEA TEMPERATURE    : 20 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH NORTHERLY WINDS.  SUNNY
     INTERVALS. ONE OR TWO RAIN PATCHES AT NIGHT.=

    ===================================================================
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.

    There is no Significant Weather Information (SIGMET)

    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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     2003copy right image | Important notices | Privacy policy Last revision date: <31 Dec 2018> 
    TROPICAL CYCLONE WARNING FOR SHIPPING
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    Tropical Cyclone Warning for Shipping

    There is no tropical cyclone warning for shipping*.




    *Tropical cyclone warnings for shipping are issued by the Hong Kong Observatory for tropical cyclones located within the area bounded by 105E and 125E , 10N and 30N.




    For other tropical cyclone related information, please visit the World Meteorological Organization Web Site - Severe Weather Information Centre.

    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 01/Jan/2019 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     15.6 C
Minimum Air Temperature                     11.8 C
Grass Minimum Temperature                   11.5 C
Relative Humidity                        60 - 73 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          2162.9 mm
Against an average of                     2398.5 mm

Other Stations                Min                  Max
King's Park                  10.9 C               15.3 C
Wong Chuk Hang               11.7 C               17.3 C
Ta Kwu Ling                   8.8 C               14.3 C
Lau Fau Shan                  8.9 C               12.4 C
Tai Po                        9.2 C               13.3 C
Sha Tin                       9.5 C               14.3 C
Tuen Mun                      9.6 C               13.9 C
Tseung Kwan O                10.1 C               17.5 C
Sai Kung                     10.5 C               14.2 C
Cheung Chau                  10.4 C               17.5 C
Chek Lap Kok                  9.8 C               13.3 C
Tsing Yi                     10.5 C               15.8 C
Shek Kong                     9.3 C               14.8 C
Tsuen Wan Ho Koon             8.3 C               13.5 C
Tsuen Wan Shing Mun Valley   10.2 C               16.2 C
Hong Kong Park               11.9 C               16.8 C
Shau Kei Wan                 11.4 C               16.5 C
Kowloon City                 10.1 C               15.2 C
Happy Valley                 11.9 C               17.0 C
Wong Tai Sin                 10.1 C               14.6 C
Stanley                      12.3 C               16.6 C
Kwun Tong                    10.8 C               16.6 C
Sham Shui Po                 10.5 C               17.2 C
Kai Tak Runway Park          11.4 C               16.1 C
Yuen Long Park                9.1 C               14.4 C
Tai Mei Tuk                9.2 C               15.4 C

Duration of sunshine (King's Park):              4.4 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 4.
 

Yesterday's (31 Dec 2018) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.09 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                           0.09
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                           0.13
Sai Wan Ho                          0.10
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 31 Dec
     2003copy right image | Important notices | Privacy policy Last revision date: <01 Jan 2019> 

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