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Bulletin issued at 11:02 HKT 01/Jan/2019

At 11 a.m. at the Hong Kong Observatory the air temperature was 14 degrees Celsius and the relative humidity 69 per cent.
During the past hour the mean UV Index recorded at King's Park was 3. The intensity of UV radiation was moderate.

Please be reminded that:

The Fire Danger Warning is Yellow and the fire risk is high.
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 15 degrees;
Wong Chuk Hang 15 degrees;
Ta Kwu Ling 13 degrees;
Lau Fau Shan 11 degrees;
Tai Po 12 degrees;
Sha Tin 13 degrees;
Tuen Mun 12 degrees;
Tseung Kwan O 15 degrees;
Sai Kung 13 degrees;
Cheung Chau 14 degrees;
Chek Lap Kok 12 degrees;
Tsing Yi 14 degrees;
Shek Kong 13 degrees;
Tsuen Wan Ho Koon 13 degrees;
Tsuen Wan Shing Mun Valley 15 degrees;
Hong Kong Park 15 degrees;
Shau Kei Wan 16 degrees;
Kowloon City 14 degrees;
Happy Valley 16 degrees;
Wong Tai Sin 15 degrees;
Stanley 16 degrees;
Kwun Tong 15 degrees;
Sham Shui Po 14 degrees;
Kai Tak Runway Park 15 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 1 Jan

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Bulletin updated at 10:45 HKT 01/Jan/2019

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

An intense winter monsoon persists over Guangdong.

Weather forecast for today

Sunny periods. Cold with one or two rain patches at night. Moderate to fresh northerly winds, occasionally strong on the high ground.

Outlook : Remaining cold in the next 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 09:00 HKT 01/Jan/2019

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

GENERAL SITUATION AT 312100 UTC:
AN INTENSE NORTHEAST MONSOON IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 010100 UTC:

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


  • 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 01/Jan/2019

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 01 January 2019

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

    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.
    A few rain patches.
    Rough seas.

    Nan'ao, 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
    East to northeasterly winds of force 6 to 7, up to force 8 at first.

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

    Waglan Island Wind north force 5

    Shantou Wind southeast force 1
      Visibility 27 Kilometres

    Huangmaozhou Wind north force 5

    Macau Wind north force 3
      Visibility 11 Kilometres

    Xisha Wind northeast force 4
      Visibility 13 Kilometres in showers

  • Explanation of Seas or Sea Waves
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  • 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 01/JAN/2019
    (Next update at 12:30 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 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  360/10-15, OCNL 20
       OFFSHORE:  010/20-25                            10-16
   B.   2000 FT:  050/20-25                            10
   C.   5000 FT:  130/25                               11
   D.  10000 FT:  220/10                               6
   E.  18000 FT:  240/40                               MS6
   F.  24000 FT:  250/50                               MS14
   G.  30000 FT:  250/55                               MS27
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      1200-2200 FT, 2900-4000 FT
   I. WEATHER       : 
      MAINLY CLOUDY. SUNNY INTERVALS IN THE AFTERNOON.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2500 FT  SCT 4000 FT
   K. VISIBILITY    : 9 KM.
   L. 0 DEG. C LEVEL: 13000 FT      10 DEG. C LEVEL(S) : NEAR SURFACE, 2000, 6800 FT
   M. TURBULENCE    : MOD TO SEV.
   N. SEA STATE     : 3.0-4.0 M     SEA TEMPERATURE    : 19 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH NORTHERLY WINDS, OCCASIONALLY
     STRONG OFFSHORE AND ON HIGH GROUND. MAINLY
     CLOUDY WITH ONE OR TWO 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.

    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 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
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