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Bulletin issued at 12:02 HKT 11/Dec/2018

At noon at the Hong Kong Observatory the air temperature was 19 degrees Celsius and the relative humidity 63 per cent.
During the past hour the mean UV Index recorded at King's Park was 4. The intensity of UV radiation was moderate.

The air temperatures at other places were:

King's Park 19 degrees;
Wong Chuk Hang 20 degrees;
Ta Kwu Ling 17 degrees;
Lau Fau Shan 17 degrees;
Tai Po 16 degrees;
Sha Tin 17 degrees;
Tuen Mun 18 degrees;
Tseung Kwan O 19 degrees;
Sai Kung 18 degrees;
Cheung Chau 19 degrees;
Chek Lap Kok 17 degrees;
Tsing Yi 18 degrees;
Shek Kong 17 degrees;
Tsuen Wan Ho Koon 17 degrees;
Tsuen Wan Shing Mun Valley 19 degrees;
Hong Kong Park 19 degrees;
Shau Kei Wan 19 degrees;
Kowloon City 19 degrees;
Happy Valley 20 degrees;
Wong Tai Sin 18 degrees;
Stanley 21 degrees;
Kwun Tong 19 degrees;
Sham Shui Po 20 degrees;
Kai Tak Runway Park 19 degrees;
Yuen Long Park 18 degrees;
Tai Mei Tuk 19 degrees.

A trace of rainfall was recorded at the Hong Kong Observatory between midnight last night and midday today.


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


Climatological Information for 11 Dec

Regional Weather in Hong Kong

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Hong Kong Climatology


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Bulletin updated at 11:45 HKT 11/Dec/2018

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

The northeast monsoon is bringing rather cool weather to Guangdong. Meanwhile, pressure is rising over inland Guangdong. Under the influence of a replenishment of the monsoon, temperatures will fall significantly tonight over the south China coastal areas.

Weather forecast for this afternoon and tonight

Bright periods in the afternoon. Mainly cloudy and rather cool with temperatures falling to about 14 degrees tonight. Moderate to fresh northerly winds, occasionally strong offshore.

Outlook : Rather cool tomorrow with a minimum temperature of around 13 degrees in the urban areas, and a couple of degrees lower in the New Territories. Temperatures rising gradually in the latter part of this week.


(The above forecast period is valid up to 23:59 HKT today, 11/12/2018; 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 11/Dec/2018

GALE WARNING AREA: TAIWAN STRAIT.

GENERAL SITUATION AT 102100 UTC:
THE NORTHEAST MONSOON IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 110100 UTC:

HONG KONG= N 5, BEC 6. RAIN PATCHES. SEA UP TO 2 M, BEC 3 M. SWELL NE 2 M. TEMP 19-14 C. =
KWANGTUNG= N TO NE 5-6, BEC 7. RAIN PATCHES. SEA 2-3 M, BEC 4 M. SWELL NE 2 M. =
TAIWAN STRAIT= N TO NE 7-8. RAIN PATCHES. SEA 4-6 M. SWELL NE 3 M. =
BASHI= N TO NE 6-7. CLD. SEA 3-4 M. SWELL NE 2-3 M. =
PRATAS= N TO NE 6-7. RAIN PATCHES. SEA 3-4 M. SWELL NE 2-3 M. =
BALINTANG= N TO NE 6-7. CLD. SEA 3-4 M. SWELL NE 2-3 M. =
SCARBOROUGH= N TO NE 6-7. CLD. SEA 3-4 M. SWELL NE 2-3 M. =
PARACEL= N TO NE 6-7. RAIN PATCHES. SEA 3-4 M. SWELL NE 2-3 M. =
TONKIN= N TO NE 6-7. RAIN PATCHES. SEA 3-4 M. =
DANANG= N TO NE 6-7. RAIN PATCHES. SEA 3-4 M. SWELL 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 12:30 HKT 11/Dec/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 12:30 p.m. on 11 December 2018

    Warnings:
    Strong winds in all areas.

    Weather Situation:
    The northeast monsoon is affecting the south China coastal waters. Meanwhile, pressure is rising over inland Guangdong. The associated replenishment of the northeast monsoon will reach the south China coastal waters today.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    North force 5 to 6.
    Moderate to rough seas.

    Nan'ao, Shanwei, South of Hong Kong and Shangchuan Dao:
    North to northeast force 5 to 6, occasionally force 7.
    Moderate to rough 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 force 4
      Visibility 50 Kilometres or above

    Shantou Wind southeast force 2
      Visibility 30 Kilometres

    Dongsha Wind north-northeast force 4
      Visibility 10 Kilometres

    Huangmaozhou Wind north-northwest force 5

    Macau Wind north force 3
      Visibility 10 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 12:30 HKT 11/DEC/2018
    (Next update at 17:30 HKT 11/DEC/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 SOUTH
     CHINA COASTAL AREAS.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1300 TO 2300 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  360/10-15, OCNL 20
       OFFSHORE:  360/15-20, OCNL 25                   19-14
   B.   2000 FT:  020/15-20, OCNL 25                   13
   C.   5000 FT:  360/10                               14
   D.  10000 FT:  250/10                               7
   E.  18000 FT:  250/40                               MS6
   F.  24000 FT:  250/50                               MS17
   G.  30000 FT:  270/60                               MS28
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      2900 - 3100, 4000 - 4700 FT.
   I. WEATHER       : 
      BRIGHT PERIODS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT  SCT 8000 FT.
   K. VISIBILITY    : 9 KM.
   L. 0 DEG. C LEVEL: 14500 FT      10 DEG. C LEVEL(S) : 8800 FT
   M. TURBULENCE    : MOD TO SEV.
   N. SEA STATE     : 2.0-3.0 M     SEA TEMPERATURE    : 22 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH NORTHERLY WINDS, OCCASIONALLY
     STRONG OFFSHORE.  MAINLY CLOUDY.=

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

    There is no Significant Weather Information (SIGMET)

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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

    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 11/Dec/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     18.3 C
Minimum Air Temperature                     15.1 C
Grass Minimum Temperature                   15.8 C
Relative Humidity                        70 - 84 Percent
Rainfall                                     0.2 mm 
Total rainfall since 1st January          2152.3 mm
Against an average of                     2377.6 mm

Other Stations                Min                  Max
King's Park                  14.3 C               18.5 C
Wong Chuk Hang               15.9 C               19.3 C
Ta Kwu Ling                  11.3 C               16.5 C
Lau Fau Shan                 11.2 C               16.3 C
Tai Po                       11.5 C               15.8 C
Sha Tin                      12.6 C               17.0 C
Tuen Mun                     12.2 C               16.3 C
Tseung Kwan O                14.0 C               18.4 C
Sai Kung                     13.8 C               17.9 C
Cheung Chau                  13.8 C               17.5 C
Chek Lap Kok                 12.8 C               17.1 C
Tsing Yi                     14.4 C               18.3 C
Shek Kong                    11.7 C               16.9 C
Tsuen Wan Ho Koon            11.1 C               16.2 C
Tsuen Wan Shing Mun Valley   13.1 C               17.1 C
Hong Kong Park               15.1 C               18.7 C
Shau Kei Wan                 15.0 C               19.4 C
Kowloon City                 13.6 C               18.2 C
Happy Valley                 15.9 C               19.5 C
Wong Tai Sin                 13.4 C               18.0 C
Stanley                      16.1 C               19.8 C
Kwun Tong                    14.6 C               19.1 C
Sham Shui Po                 13.2 C               17.5 C
Kai Tak Runway Park          14.5 C               19.2 C
Yuen Long Park               11.6 C               16.5 C
Tai Mei Tuk               12.6 C               18.1 C

Duration of sunshine (King's Park):              0.1 H
The mean UV index recorded at King's Park yesterday was 0.8,
the UV intensity was Low.
The maximum UV index for yesterday was 2.
 

Yesterday's (10 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                         0.11
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 10 Dec
     2003copy right image | Important notices | Privacy policy Last revision date: <11 Dec 2018> 

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