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Bulletin issued at 11:02 HKT 31/Dec/2018

At 11 a.m. at the Hong Kong Observatory the air temperature was 14 degrees Celsius and the relative humidity 67 per cent.
During the past hour the mean UV Index recorded at King's Park was 2. The intensity of UV radiation was low.

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 13 degrees;
Wong Chuk Hang 14 degrees;
Ta Kwu Ling 11 degrees;
Lau Fau Shan 11 degrees;
Tai Po 11 degrees;
Sha Tin 11 degrees;
Tuen Mun 12 degrees;
Tseung Kwan O 14 degrees;
Sai Kung 12 degrees;
Cheung Chau 13 degrees;
Chek Lap Kok 11 degrees;
Tsing Yi 13 degrees;
Shek Kong 12 degrees;
Tsuen Wan Ho Koon 10 degrees;
Tsuen Wan Shing Mun Valley 13 degrees;
Hong Kong Park 14 degrees;
Shau Kei Wan 14 degrees;
Kowloon City 13 degrees;
Happy Valley 15 degrees;
Wong Tai Sin 13 degrees;
Stanley 15 degrees;
Kwun Tong 13 degrees;
Sham Shui Po 13 degrees;
Kai Tak Runway Park 13 degrees;
Yuen Long Park 12 degrees;
Tai Mei Tuk 14 degrees.


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


Climatological Information for 31 Dec

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Bulletin updated at 10:45 HKT 31/Dec/2018

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

The winter monsoon is bringing cold weather to Guangdong.

Weather forecast for today

Mainly cloudy with sunny periods. Cold in the morning and at night. Moderate to fresh northerly winds.

Outlook : Cold weather will persist and it will be windier with a few rain patches on New Year's Day and the following couple of days.


(The above forecast period is valid up to 23:59 HKT today, 31/12/2018; Regular update at : around 45 minutes past each hour, 16:15 HKT and 23:15 HKT)

Information on Tropical Cyclones

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MARINE FORECAST
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Marine Forecast

Weather Information for the Marine Community

Bulletin issued at 09:00 HKT 31/Dec/2018

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

GENERAL SITUATION AT 302100 UTC:
AN INTENSE NORTHEAST MONSOON IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 310100 UTC:

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


  • 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 31/Dec/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 31 December 2018

    Warnings:
    Gale force winds in all areas.

    Weather Situation:
    An intense northeast monsoon is affecting the south China coastal waters.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    North to northeast force 7 to 8.
    Rough to very rough seas.

    Nan'ao:
    North to northeast force 8, occasionally force 9.
    Very rough to high seas.

    Shanwei:
    North to northeast force 8.
    Very rough seas.

    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.

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

    Waglan Island Wind north force 5

    Dongsha Wind northeast force 4
      Visibility 10 Kilometres

    Huangmaozhou Wind north-northeast force 4

    Macau Wind north force 3
      Visibility 8 Kilometres

    Xisha Wind northeast force 4
      Visibility 11 Kilometres

  • Explanation of Seas or Sea Waves
  • Explanation of Swells
  • Descriptive Terms of Wind Speeds
  • Visibility Readings in Hong Kong Waters
  • Map showing forecast areas
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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 09:00 HKT 31/DEC/2018
    (Next update at 12:30 HKT 31/DEC/2018)
    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 IS AFFECTING THE
     SOUTH CHINA COASTAL AREAS.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  360/10-15, OCNL 20
       OFFSHORE:  020/20-25                            10-16
   B.   2000 FT:  050/20-25                            10
   C.   5000 FT:  100/15                               10
   D.  10000 FT:  270/20                               7
   E.  18000 FT:  250/45                               MS6
   F.  24000 FT:  250/55                               MS17
   G.  30000 FT:  260/65                               MS26
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      1700-2600, 3100-3800 FT.
   I. WEATHER       : 
      MAINLY CLOUDY.  BRIGHT PERIODS DURING THE DAY.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT  SCT 4000 FT  BKN 8000 FT.
   K. VISIBILITY    : 7 KM.
   L. 0 DEG. C LEVEL: 13500 FT
      10 DEG. C LEVEL(S) : NEAR SURFACE, 2000, 5000 FT
   M. TURBULENCE    : MOD TO SEV.
   N. SEA STATE     : 2.5-3.5 M     SEA TEMPERATURE    : 20 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH NORTHERLY WINDS, 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.

    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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    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 31/Dec/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     15.4 C
Minimum Air Temperature                     10.3 C
Grass Minimum Temperature                   12.2 C
Relative Humidity                        61 - 73 Percent
Rainfall                                      Trace 
Total rainfall since 1st January          2162.9 mm
Against an average of                     2396.8 mm

Other Stations                Min                  Max
King's Park                   9.2 C               15.2 C
Wong Chuk Hang               10.2 C               17.5 C
Ta Kwu Ling                   7.7 C               13.3 C
Lau Fau Shan                  8.5 C               13.1 C
Tai Po                        8.3 C               13.5 C
Sha Tin                       8.9 C               13.9 C
Tuen Mun                      9.3 C               13.9 C
Tseung Kwan O                 9.4 C               16.6 C
Sai Kung                      8.9 C               14.2 C
Cheung Chau                   9.5 C               16.6 C
Chek Lap Kok                  9.4 C               13.9 C
Tsing Yi                      9.8 C               16.0 C
Shek Kong                     8.3 C               14.3 C
Tsuen Wan Ho Koon             7.1 C               13.7 C
Tsuen Wan Shing Mun Valley    9.5 C               16.4 C
Hong Kong Park               10.2 C               17.1 C
Shau Kei Wan                  9.9 C               17.8 C
Kowloon City                  8.8 C               15.2 C
Happy Valley                 10.5 C               17.1 C
Wong Tai Sin                  9.5 C               15.5 C
Stanley                      10.8 C               17.8 C
Kwun Tong                     9.5 C               17.1 C
Sham Shui Po                  9.6 C               17.2 C
Kai Tak Runway Park           9.9 C               16.8 C
Yuen Long Park                8.4 C               14.0 C
Tai Mei Tuk                8.4 C               15.7 C

Duration of sunshine (King's Park):              5.6 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 5.
 

Yesterday's (30 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                          0.10
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 30 Dec
     2003copy right image | Important notices | Privacy policy Last revision date: <31 Dec 2018> 

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