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Bulletin issued at 10:02 HKT 23/Dec/2018

At 10 a.m. at the Hong Kong Observatory the air temperature was 21 degrees Celsius and the relative humidity 93 per cent.
During the past hour the mean UV Index recorded at King's Park was 0.9. The intensity of UV radiation was low.

The air temperatures at other places were:

King's Park 21 degrees;
Wong Chuk Hang 21 degrees;
Ta Kwu Ling 21 degrees;
Lau Fau Shan 21 degrees;
Tai Po 20 degrees;
Sha Tin 20 degrees;
Tuen Mun 21 degrees;
Tseung Kwan O 20 degrees;
Sai Kung 20 degrees;
Cheung Chau 21 degrees;
Chek Lap Kok 22 degrees;
Tsing Yi 22 degrees;
Shek Kong 20 degrees;
Tsuen Wan Ho Koon 21 degrees;
Tsuen Wan Shing Mun Valley 21 degrees;
Hong Kong Park 21 degrees;
Shau Kei Wan 21 degrees;
Kowloon City 20 degrees;
Happy Valley 21 degrees;
Wong Tai Sin 21 degrees;
Stanley 21 degrees;
Kwun Tong 21 degrees;
Sham Shui Po 21 degrees;
Kai Tak Runway Park 21 degrees;
Yuen Long Park 21 degrees;
Tai Mei Tuk 20 degrees.

Between 8:45 and 9:45 a.m., the rainfall recorded in various regions were:

Wan Chai 1 to 3 mm;
Southern District 0 to 2 mm;
Central & Western District 0 to 2 mm;
Eastern District 0 to 1 mm;
Sham Shui Po 0 to 1 mm;
Sha Tin 0 to 1 mm;
Kwai Tsing 0 to 1 mm;
Yau Tsim Mong 0 to 1 mm;
Tai Po 0 to 1 mm;
Kowloon City 0 to 1 mm.


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


Climatological Information for 23 Dec

Regional Weather in Hong Kong

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Hong Kong Climatology


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Bulletin updated at 09:45 HKT 23/Dec/2018

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

Pressure is rising over inland Guangdong. The northeast monsoon will reach the coastal areas during the day.

Weather forecast for today

Mainly cloudy with a few rain patches. Visibility rather low in some areas at first. Moderate north to northeasterly winds, becoming fresh. It will be cooler. Temperatures over the urban areas falling to about 19 degrees at night, and a couple of degrees lower in the New Territories.

Outlook : Cooler with light rain tomorrow. The weather will be brighter over the Christmas holidays. Temperatures falling significantly in the latter part of this week.


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

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

GENERAL SITUATION AT 222100 UTC:
THE NORTHEAST MONSOON IS EXPECTED TO AFFECT THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 230100 UTC:

HONG KONG= N TO NE 5-6, BEC 7. RAIN PATCHES. DOWN TO 2000 M IN MIST PATCHES AT FIRST. SEA 2-3 M, BEC 4 M. SWELL NE 2 M. TEMP 21-17 C. =
KWANGTUNG= N TO NE 6-7, BEC 8. RAIN PATCHES. SEA 3-4 M, BEC 6 M. SWELL NE 2-3 M. =
TAIWAN STRAIT= NE 7-8, OCNL 9. RAIN PATCHES. SEA UP TO 8 M. SWELL NE 3 M. =
BASHI= E TO NE 6-7, BEC 8. RAIN PATCHES. SEA 3-4 M, BEC 6 M. SWELL NE 2-3 M. =
PRATAS= NE 6-7, BEC 8. RAIN PATCHES. SEA 3-4 M, BEC 6 M. SWELL NE 2-3 M. =
BALINTANG= E TO NE 6-7, BEC 8. RAIN PATCHES. SEA 3-4 M, BEC 6 M. SWELL NE 2-3 M. =
SCARBOROUGH= NE 6-7, BEC 8. RAIN PATCHES. SEA 3-4 M, BEC 6 M. SWELL NE 2-3 M. =
PARACEL= N TO NE 6-7, BEC 8. RAIN PATCHES. SEA 3-4 M, BEC 6 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 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

    Current Weather | Local Weather Forecast | Regional Temperature Forecast in HK
    9-day Weather Forecast | UV Index Forecast | Weather Information for Fishermen

    Bulletin issued at 09:30 HKT 23/Dec/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 23 December 2018

    Warnings:
    Gale force winds in Nan'ao, Shanwei, south of Hong Kong and Shangchuan Dao. Strong winds in Hong Kong adjacent waters.

    Weather Situation:
    Pressure is rising over inland Guangdong. The northeast monsoon is expected to reach the south China coastal waters during the day.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    North to northeast force 5 to 6, becoming force 7.
    A few rain patches, visibility rather low in some areas at first.
    Moderate to rough seas.

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

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

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

    Waglan Island Wind north force 4
      Visibility 2800 Metres

    Shantou Wind east-northeast force 2
      Visibility 2500 Metres in rain

    Dongsha Wind northeast force 3
      Visibility 10 Kilometres

    Huangmaozhou Wind northeast force 4

    Macau Wind north-northeast force 3
      Visibility 5000 Metres

    Xisha Wind northeast force 3
      Visibility 14 Kilometres in showers

  • 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 09:30 HKT 23/DEC/2018
    (Next update at 12:30 HKT 23/DEC/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS AND SEV TURB.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     PRESSURE IS RISING OVER INLAND GUANGDONG. THE
     NORTHEAST MONSOON IS EXPECTED TO REACH THE SOUTH
     CHINA COASTAL AREAS DURING THE DAY.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  040/5-10
                  BECMG 020/10-15
       OFFSHORE:  030/10-15
                  BECMG 020/15-20 OCNL 25              20-23
   B.   2000 FT:  010/15-20
                  BECMG 020/20-25                      16
   C.   5000 FT:  090/10                               15
   D.  10000 FT:  150/15                               9
   E.  18000 FT:  220/25                               MS6
   F.  24000 FT:  240/35                               MS13
   G.  30000 FT:  240/35                               MS25
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      MAINLY CLOUDY WITH A FEW RAIN PATCHES.
      LOCALISED MIST.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT SCT 3500 FT BKN 6000 FT
   K. VISIBILITY    : 7 KM. TEMPO 2500 M IN RAIN/MIST.
   L. 0 DEG. C LEVEL: 15000 FT      10 DEG. C LEVEL(S) : 8800 FT
   M. TURBULENCE    : MOD TO SEV OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 1.0-3.5 M     SEA TEMPERATURE    : 21 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH NORTH TO NORTHEASTERLY WINDS,
     STRONG OFFSHORE. MAINLY 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.

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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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    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 23/Dec/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     25.2 C
Minimum Air Temperature                     20.0 C
Grass Minimum Temperature                   17.8 C
Relative Humidity                        65 - 86 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          2152.3 mm
Against an average of                     2386.7 mm

Other Stations                Min                  Max
King's Park                  19.0 C               26.1 C
Wong Chuk Hang               19.8 C               25.9 C
Ta Kwu Ling                  18.5 C               27.5 C
Lau Fau Shan                 17.5 C               25.2 C
Tai Po                       18.4 C               24.4 C
Sha Tin                      18.8 C               26.3 C
Tuen Mun                     18.9 C               27.2 C
Tseung Kwan O                18.6 C               26.3 C
Sai Kung                     19.3 C               24.0 C
Cheung Chau                  18.2 C               27.0 C
Chek Lap Kok                 20.3 C               26.1 C
Tsing Yi                     20.1 C               27.2 C
Shek Kong                    18.1 C               27.7 C
Tsuen Wan Ho Koon            17.6 C               26.6 C
Tsuen Wan Shing Mun Valley   19.3 C               28.0 C
Hong Kong Park               19.7 C               26.4 C
Shau Kei Wan                 19.1 C               25.7 C
Kowloon City                 18.8 C               27.8 C
Happy Valley                 19.9 C               27.2 C
Wong Tai Sin                 19.3 C               27.5 C
Stanley                      19.4 C               24.6 C
Kwun Tong                    19.0 C               26.3 C
Sham Shui Po                 19.2 C               27.6 C
Kai Tak Runway Park          19.9 C               25.7 C
Yuen Long Park               17.8 C               28.2 C
Tai Mei Tuk               18.6 C               26.9 C

Duration of sunshine (King's Park):              7.1 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 5.
 

Yesterday's (22 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                           0.12
Sai Wan Ho                          0.09
King's Park                         0.14
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 22 Dec
     2003copy right image | Important notices | Privacy policy Last revision date: <23 Dec 2018> 

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